阅读说明：本技术 一种具有缓释挥发性中草药有效成分的功能高分子发泡材料、制备方法和用途 (Functional polymer foaming material with slow-release volatile Chinese herbal medicine effective components, preparation method and application ) 是由 左娟 朱君秋 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种具有缓释挥发性中草药有效成分的功能高分子发泡材料、制备方法和用途。其以可发泡聚合物为基础形成的由内往外分为内芯和壳层的高分子发泡材料,其中内芯的孔隙率高密度低,壳层的孔隙率低密度高,内芯具有无数泡孔,泡孔以闭孔为主,同时泡孔内均匀填充有挥发性中草药有效成分。还可用于制备成枕类产品或香囊或发泡垫类产品。(The invention discloses a functional polymer foaming material with slow-release volatile Chinese herbal medicine effective components, a preparation method and application thereof. The high-molecular foaming material is formed by taking a foaming polymer as a base and is divided into an inner core and a shell layer from inside to outside, wherein the porosity of the inner core is high, the density is low, the porosity of the shell layer is low, the inner core is provided with countless foam holes, the foam holes are mainly closed, and simultaneously, volatile Chinese herbal medicine active ingredients are uniformly filled in the foam holes. Can also be used for preparing pillow products, sachets or foaming pads.)

1. A functional polymer foaming material with slow release of volatile Chinese herbal medicine active ingredients is characterized in that the functional polymer foaming material is formed by taking a foamable polymer as a base and is divided into an inner core and a shell layer from inside to outside, wherein the porosity of the inner core is high, the density is low, the porosity of the shell layer is low, the density is high, the inner core is provided with countless foam holes, the foam holes are mainly closed, the volatile Chinese herbal medicine active ingredients are uniformly filled in the foam holes, and preferably, the thickness of the shell layer is 10-500 micrometers.

2. The functional polymer foam material with slow release of active ingredients of volatile Chinese herbal medicines according to claim 1, wherein the foamable polymer is at least one of PE, PP, PS, PC, PVC, ABS, EVA, PU, thermoplastic elastomers, rubber, and biodegradable plastics.

3. The functional polymer foam material with the slow release of the effective components of the volatile Chinese herbal medicines as claimed in claim 2, wherein the thermoplastic elastomer is a styrene elastomer, a polyolefin elastomer or a thermoplastic polyurethane elastomer; preferably, the styrenic elastomer is TPE, TPR, SBS, SEBS, SIS or SEPS; the polyolefin elasticity is POE, OBC, TPV or TPO; the thermoplastic polyurethane elastomer is TPU;

optionally, the rubber is natural rubber or synthetic rubber; preferably, the synthetic rubber is silica gel, styrene-butadiene rubber, nitrile rubber, chlorinated nitrile rubber, butadiene rubber, chloroprene rubber, butyl rubber, isoprene rubber, acrylate rubber, fluororubber, ethylene propylene diene monomer rubber, ethylene propylene rubber or chlorosulfonated polyethylene rubber;

optionally, the biodegradable plastic is selected from polylactic acid, polycaprolactone, poly (butylene adipate-co-terephthalate), poly (butylene succinate) and its copolymers, polyhydroxyalkanoate, aliphatic aromatic copolyester or polyvinyl alcohol biodegradable plastic, and at least one of starch modified (or filled) polyethylene, polypropylene, polyvinyl chloride and polystyrene.

4. The functional polymer foam material with the slow release of the effective components of the volatile Chinese herbal medicines according to claim 1 is prepared by adopting the following scheme one or scheme two;

the first scheme is as follows:

step S11, preparing a Chinese herbal prescription: weighing Chinese herbal materials or Chinese herbal extracts containing volatile Chinese herbal components according to the prescription to obtain Chinese herbal prescription;

step S12, preparing a material to be foamed: blending and plasticizing one or more foamable polymer raw materials and an auxiliary agent uniformly, and then carrying out screw extrusion granulation or extrusion molding to obtain a blank body with a specific shape, namely preparing a material A to be foamed;

step S13, supercritical fluid extraction: putting the Chinese herbal medicine formula prepared in the step S11 and the material A to be foamed prepared in the step S12 into a supercritical reaction kettle, adding water, introducing a supercritical fluid with the pressure of 3.5-30 MPa, and adjusting the temperature in the reaction kettle to 35-T_mExtracting volatile Chinese medicinal components;

step S14, supercritical fluid foaming: after extraction, the temperature in the supercritical reaction kettle is adjusted to (T)_s－5)℃～T_mDEG C; when the extraction temperature is just above (T)_s－5)℃～T_mBetween DEG C, can be (T)_s－5)℃～T_mAdjusting the temperature or keeping the temperature unchanged at the temperature of DEG C; continuously maintaining the pressure until the supercritical fluid is dissolved and saturated in the material A to be foamed, quickly removing the pressure in the supercritical reaction kettle, and quickly expanding the supercritical fluid dissolved in the polymer body to form a polymer foaming material with countless cells; the supercritical fluid in the polymer is decompressed into high-pressure gas and volatile traditional Chinese medicine components which are stored in foam pores of the polymer foam material, and the functional polymer foam material with granular or special shape and the function of slowly releasing the active ingredients of the volatile traditional Chinese medicine is obtained after cooling;

the second scheme is as follows:

step S21, preparing a Chinese herbal prescription: weighing Chinese herbal medicine raw materials or Chinese herbal medicine extract containing volatile Chinese herbal medicine components according to the prescription to obtain a Chinese herbal medicine prescription;

step S22, preparing a material to be foamed: blending and plasticizing the Chinese herbal medicine formula prepared in the step S21, one or more foamable polymer raw materials and an auxiliary agent uniformly according to a formula, and then carrying out screw extrusion granulation or shaping to obtain a blank body with a specific shape, namely preparing a material B to be foamed;

step S23, supercritical fluid extraction and foaming: the material B to be foamed prepared in the step S22 is put into a supercritical reaction kettle, water is added, high-pressure supercritical fluid with the pressure of 3.5-30 MPa is introduced, and the temperature in the supercritical reaction kettle is adjusted to (T)_s－5)℃～(T_m+5) DEG C, keeping the pressure until the supercritical fluid is dissolved and saturated in the material A to be foamed, then quickly removing the pressure in the supercritical reaction kettle, and quickly expanding the supercritical fluid and the volatile traditional Chinese medicine components dissolved in the polymer body to form a countless foamed polymer material with foam holes, thus obtaining the granular or special-shaped functional polymer foaming material with the slow-release volatile traditional Chinese medicine components;

wherein, T_sIs the actual softening point, T, of the material to be foamed under the holding pressure_mThe actual melting point of the material to be foamed under the pressure keeping pressure is obtained;

preferably, the supercritical fluid is carbon dioxide, nitrogen, or a mixture of carbon dioxide and nitrogen or air;

the processing aid comprises a plasticizer, a heat stabilizer, an antioxidant, a light stabilizer, a flame retardant, an antistatic agent, a bacteriostatic mildew inhibitor, a coloring agent, a whitening agent, a filler, a cross-linking agent, a lubricant or a mold release agent.

5. A method for preparing the functional polymer foaming material with the slow release of the volatile Chinese herbal medicine effective components in the claim 1 is characterized by being prepared by adopting the following scheme I or scheme II;

the first scheme is as follows:

step S11, preparing a Chinese herbal prescription: weighing Chinese herbal materials or Chinese herbal extracts containing volatile Chinese herbal components according to the prescription to obtain Chinese herbal prescription;

step S12, preparing a material to be foamed: blending and plasticizing one or more foamable polymer raw materials and an auxiliary agent uniformly, and then carrying out screw extrusion granulation or extrusion molding to obtain a blank body with a specific shape, namely preparing a material A to be foamed;

step S13, supercritical fluid extraction: putting the Chinese herbal medicine formula prepared in the step S11 and the material A to be foamed prepared in the step S12 into a supercritical reaction kettle, adding water, introducing a supercritical fluid with the pressure of 3.5-30 MPa, and adjusting the temperature in the reaction kettle to 35-T_mExtracting volatile Chinese medicinal components;

step S14, supercritical fluid foaming: after extraction, the temperature in the supercritical reaction kettle is adjusted to (T)_s－5)℃～T_mDEG C; when the extraction temperature is just above (T)_s－5)℃～T_mBetween DEG C, can be (T)_s－5)℃～T_mAdjusting the temperature or keeping the temperature unchanged at the temperature of DEG C; continuously maintaining the pressure until the supercritical fluid is dissolved and saturated in the material A to be foamed, quickly removing the pressure in the supercritical reaction kettle, and quickly expanding the supercritical fluid dissolved in the polymer body to form a polymer foaming material with countless cells; the supercritical fluid in the polymer is decompressed into high-pressure gas and volatile traditional Chinese medicine components which are stored in the foam pores of the polymer foam material, and the functional polymer foam material with granular or special shape and slow-release volatile traditional Chinese medicine components is obtained after coolingFeeding;

the second scheme is as follows:

step S21, preparing a Chinese herbal prescription: weighing Chinese herbal materials or Chinese herbal extracts containing volatile Chinese herbal components according to the prescription to obtain Chinese herbal prescription;

step S22, preparing a material to be foamed: blending and plasticizing the Chinese herbal medicine formula prepared in the step S21, one or more foamable polymer raw materials and an auxiliary agent uniformly according to a formula, and then carrying out screw extrusion granulation or shaping to obtain a blank body with a specific shape, namely preparing a material B to be foamed;

step S23, supercritical fluid extraction and foaming: the material B to be foamed prepared in the step S22 is put into a supercritical reaction kettle, a proper amount of water is added, a high-pressure supercritical fluid with the pressure of 3.5-30 MPa is introduced, and the temperature in the supercritical reaction kettle is adjusted to (T)_s－5)℃～(T_m+5) DEG C, keeping the pressure until the supercritical fluid is dissolved and saturated in the material A to be foamed, then quickly removing the pressure in the supercritical reaction kettle, and quickly expanding the supercritical fluid and the volatile traditional Chinese medicine components dissolved in the polymer body to form a countless foamed polymer material with foam holes, thus obtaining the granular or special-shaped functional polymer foaming material with the slow-release volatile traditional Chinese medicine components;

wherein, T_sIs the actual softening point, T, of the material to be foamed under the holding pressure_mThe actual melting point of the material to be foamed under the pressure keeping pressure is obtained;

preferably, the supercritical fluid is carbon dioxide, nitrogen, or a mixture of carbon dioxide and nitrogen or air;

optionally, the processing aid comprises a plasticizer, a heat stabilizer, an antioxidant, a light stabilizer, a flame retardant, an antistatic agent, a bacteriostatic and mildewproof agent, a coloring agent, a whitening agent, a filler, a crosslinking agent, a lubricant or a mold release agent.

6. Use of the functional polymer material with slow release of volatile herbal ingredients as claimed in any one of claims 1 to 4 in pillow products or sachets or foam pads.

7. A pillow product containing the high molecular functional material with the slow release of the volatile Chinese herbal medicine effective components according to any one of claims 1 to 4, which comprises a pillowcase and a pillow core, and is characterized in that the pillow core completely or partially adopts the high molecular functional material with the slow release of the volatile Chinese herbal medicine components according to claim 1 as a filler.

8. A sachet product containing the high molecular functional material with the slow release of the volatile Chinese herbal medicine effective components according to any one of claims 1 to 4, which is characterized in that the high molecular functional material with the slow release of the volatile Chinese herbal medicine components according to claim 1 is adopted in the whole or part of the sachet.

9. A foaming pad product containing the high molecular functional material with the slow release of the volatile Chinese herbal medicine effective components according to any one of claims 1 to 4, characterized in that the high molecular functional material with the slow release of the volatile Chinese herbal medicine components according to claim 1 is adopted wholly or partially when the foaming pad product is prepared.

10. The foam mat product of claim 9, wherein the foam mat product is a floor mat, a crawling mat, a yoga mat, an insole, a seat cushion, a mattress, a mouse mat.

Technical Field

The invention relates to the field of functional materials, in particular to a functional polymer foaming material with slow-release volatile Chinese herbal medicine effective components, a preparation method and application.

Background

The book Huangdi's classic on medicine: the "the former is treating the disease before the disease is treated, but not treating the disease, this is also called. "treating" means treating and managing. The disease prevention is realized by taking corresponding measures to prevent the occurrence and development of the disease. The main idea of the traditional Chinese medicine is as follows: preventing diseases before and after the disease. Advocate to prevent diseases and strengthen the body through health care and health preservation.

With the development of society and the improvement of living standard, people pay more and more attention to health, and more people urgently want to obtain healthy life and keep the healthy state of the body. Meanwhile, the working pressure and the living pressure of people are high at present, more and more people have sub-health status, and many people have various symptoms such as anxiety, headache, neurasthenia, visual deterioration, liver and kidney function deterioration and the like due to over-high pressure. Therefore, health care and health preservation are increasingly focused and acted upon by many people. For example, purchase various health products for external application and oral administration. And burning incense, placing essential oil or sachet, and providing an environment for concentrating spirit, calming the mind, nourishing the heart and benefiting the brain through volatile smell. The incense stick and the essential oil release speed are high, and the taste is heavy, so that discomfort of a part of people can be caused. Therefore, the incense and the essential oil can be ignited at home; however, in public places such as outdoors and gymnasiums, it is inconvenient to do the things according to their own preference, and the application scenarios are limited.

The traditional Chinese medicine in China contains a lot of volatile components, is widely applied in clinic, has the efficacies of relieving cough and asthma, eliminating phlegm, sweating, relieving exterior syndrome, expelling wind, easing pain, killing insects, resisting bacteria, disinfecting and the like, and is widely applied to disease prevention and treatment. The effective components of the Chinese herbal medicines are very small in specific weight, and the effective components of the Chinese herbal medicines are stored in cell membranes in plants, so that the dried Chinese herbal medicines can be stored for a long time without losing effectiveness. However, due to this, the effective components of the Chinese herbal medicine need to be extracted from the plants by decocting, extracting and other methods, so as to exert the efficacy well.

The polymer foam material is widely used for preparing various cushion products, such as crawling mats, ground mats, seat cushions, yoga mats, insoles, soles of sports shoes and the like; and as a filler for pillows, headrests, throw pillows, U-shaped pillows and the like. The products are closely contacted with people, and if the polymer foaming material can slowly release volatile Chinese herbal medicine components into the air, the functions of health preservation, health care and the like of the products can be realized.

In order to realize the function of slowly releasing volatile Chinese herbal medicine components of the high polymer foaming material, firstly, the effective components of the volatile Chinese herbal medicine are stored in the high polymer foaming material and can be slowly released. The traditional way is to grind the Chinese herbal medicines into powder, mix the powder into polymer, and then prepare the foaming material containing the Chinese herbal medicine particles by a chemical foaming way, for example, the patent CN201710832787.1 discloses a health care type body-building pad, which is prepared by mixing the Chinese herbal medicine powder, the polymer, a chemical foaming agent and other necessary processing aids and then carrying out chemical foaming. However, this method has serious disadvantages: firstly, after the Chinese herbal medicines are ground into powder, the Chinese herbal medicines are not decocted or extracted, the active ingredients of various Chinese herbal medicines still remain in the Chinese herbal medicine particles and are wrapped by cell walls, and the active ingredients are not fused with each other, so that the synergistic effect among various medicinal materials is hindered, and the drug effect is greatly reduced; secondly, because the effective components are still locked in the Chinese herbal medicine powder and are wrapped by the cell walls, the Chinese herbal medicine powder is also wrapped by the polymer, so the effective components of the Chinese herbal medicine are difficult to release. In addition, the chemical foaming temperature is high, the processing process is a non-completely closed environment, volatile traditional Chinese medicine components are easy to lose due to high-temperature volatilization, and heat-sensitive medicines can be damaged in a high-temperature environment; moreover, chemical foaming requires chemical foaming agents, auxiliary foaming agents and other chemical substances, and after foaming, toxic and harmful substances such as ammonia gas, formamide and the like are generated and remain in the foaming material, so that the foaming material is not green enough. Because of the disadvantages, the traditional method of grinding the Chinese herbal medicines into powder and then mixing the powder with the polymer for chemical foaming is adopted to prepare the foaming material, and the effect is poor, so the foaming material is not widely accepted in the market.

If the traditional method of taking the medicament by external application and internal administration is used for achieving the health-preserving and health-care effect, the method is called as heavy health care; the way of realizing health-preserving and health-care effects by smelling the smell can be called light health care. The volatile smell of Chinese herbal medicines is widely adopted to refresh brain, relieve emotion and relax mood. For example, various plant essential oils sold in the market have become a great preference of health-care people. A bottle of essential oil is placed in the working or living space, and has the effects of refreshing brain, relieving emotion, relaxing mood and the like. The essential oil is very volatile and is very volatile once contactedThe air will volatilize quickly, so essential oil must be usedSeal for a motor vehicleThe controlled release speed is difficult to be controlled easily by storing the capsule in a dark bottle. In addition, the Chinese herbal medicine sachet is a favorite product for health-care people. Packaging Chinese herbal medicine or material soaked with Chinese herbal medicine essential oil in woven bag to obtain the Chinese herbal medicine sachet. The sachet is placed or hung indoors, and has effects of refreshing brain, relieving emotion, relaxing mood, and promoting health. Such products also suffer from slow volatilization rates (for pure herbal sachets) or too fast volatilization rates (for essential oil impregnated herbal sachets). The volatilization speed of the volatile substances of the Chinese herbal medicines is controlled, and the technology key point of the slow-release product is formed.

Disclosure of Invention

The invention aims to provide a high polymer foaming material with slow-release volatile Chinese herbal medicine effective components.

In order to achieve the purpose, the invention provides a functional polymer foaming material with slow release of volatile Chinese herbal medicine active ingredients, which is characterized in that the functional polymer foaming material is formed on the basis of a foamable polymer and is divided into an inner core and a shell layer from inside to outside, wherein the porosity of the inner core is high, the density is low, the porosity of the shell layer is low, the density is high, the inner core is provided with countless foam holes, the foam holes are mainly closed, the volatile Chinese herbal medicine active ingredients are uniformly filled in the foam holes, and preferably, the thickness of the shell layer is 10-500 micrometers.

Further, the foamable polymer is at least one of PE, PP, PS, PC, PVC, ABS, EVA, PU, thermoplastic elastomer, rubber, and biodegradable plastic.

Further, the thermoplastic elastomer is a styrene elastomer, a polyolefin elastomer or a thermoplastic polyurethane elastomer; preferably, the styrenic elastomer is TPE, TPR, SBS, SEBS, SIS or SEPS; the polyolefin elasticity is POE, OBC, TPV or TPO; the thermoplastic polyurethane elastomer is TPU;

optionally, the rubber is natural rubber or synthetic rubber; preferably, the synthetic rubber is silica gel, styrene-butadiene rubber, nitrile rubber, chlorinated nitrile rubber, butadiene rubber, chloroprene rubber, butyl rubber, isoprene rubber, acrylate rubber, fluororubber, ethylene propylene diene monomer rubber, ethylene propylene rubber or chlorosulfonated polyethylene rubber;

optionally, the biodegradable plastic is selected from polylactic acid, polycaprolactone, poly (butylene adipate-co-terephthalate), poly (butylene succinate) and its copolymers, polyhydroxyalkanoate, aliphatic aromatic copolyester or polyvinyl alcohol biodegradable plastic, and at least one of starch modified (or filled) polyethylene, polypropylene, polyvinyl chloride and polystyrene.

Further, the compound is characterized by being prepared by adopting the following scheme one or scheme two;

the first scheme is as follows:

step S11, preparing a Chinese herbal prescription: weighing Chinese herbal materials or Chinese herbal extracts containing volatile Chinese herbal components according to the prescription to obtain Chinese herbal prescription;

step S12, preparing a material to be foamed: blending and plasticizing one or more foamable polymer raw materials and an auxiliary agent uniformly, and then carrying out screw extrusion granulation or extrusion molding to obtain a blank body with a specific shape, namely preparing a material A to be foamed;

step S13, supercritical fluid extraction: the Chinese herbal medicine formula prepared in the step S11 and the material A to be foamed prepared in the step S12 are put into a supercritical reaction kettle, water is added to serve as an extracting agent and a quenching agent, a supercritical fluid with the pressure of 3.5-30 MPa is introduced, and the temperature in the reaction kettle is adjusted to 35-T_mExtracting volatile Chinese medicinal components;

step S14, supercritical fluid foaming: after extraction, the temperature in the supercritical reaction kettle is adjusted to (T)_s－5)℃～T_mDEG C; when the extraction temperature is just above (T)_s－5)℃～T_mBetween DEG C, can be (T)_s－5)℃～T_mAdjusting the temperature or keeping the temperature unchanged at the temperature of DEG C; continuously maintaining the pressure until the supercritical fluid is dissolved and saturated in the material A to be foamed, quickly removing the pressure in the supercritical reaction kettle, and quickly expanding the supercritical fluid dissolved in the polymer body to form a polymer foaming material with countless cells; depressurization of supercritical fluid in polymer into high-pressure gasStoring the volatile Chinese medicinal components and the body in polymer foam material cells, and cooling to obtain granular or special-shaped functional polymer foam material with slow release of volatile Chinese medicinal effective components;

the second scheme is as follows:

step S21, preparing a Chinese herbal prescription: weighing Chinese herbal medicine raw materials or Chinese herbal medicine extract containing volatile Chinese herbal medicine components according to the prescription to obtain a Chinese herbal medicine prescription;

step S22, preparing a material to be foamed: blending and plasticizing the Chinese herbal medicine formula prepared in the step S21, one or more foamable polymer raw materials and an auxiliary agent uniformly according to a formula, and then carrying out screw extrusion granulation or shaping to obtain a blank body with a specific shape, namely preparing a material B to be foamed;

step S23, supercritical fluid extraction and foaming: the material B to be foamed prepared in the step S22 is put into a supercritical reaction kettle, water is added, high-pressure supercritical fluid with the pressure of 3.5-30 MPa is introduced, and the temperature in the supercritical reaction kettle is adjusted to (T)_s－5)℃～(T_m+5) DEG C, keeping the pressure until the supercritical fluid is dissolved and saturated in the material A to be foamed, then quickly removing the pressure in the supercritical reaction kettle, and quickly expanding the supercritical fluid and the volatile traditional Chinese medicine components dissolved in the polymer body to form a countless foamed polymer material with foam holes, thus obtaining the granular or special-shaped functional polymer foaming material with the slow-release volatile traditional Chinese medicine components;

wherein, T_sIs the actual softening point, T, of the material to be foamed under the holding pressure_mThe actual melting point of the material to be foamed under the pressure keeping pressure is obtained;

preferably, the supercritical fluid is carbon dioxide, nitrogen, or a mixture of carbon dioxide and nitrogen or air;

the processing aid comprises a plasticizer, a heat stabilizer, an antioxidant, a light stabilizer, a flame retardant, an antistatic agent, a bacteriostatic mildew inhibitor, a coloring agent, a whitening agent, a filler, a cross-linking agent, a lubricant or a mold release agent.

The invention also provides a preparation method of the functional polymer foaming material with the slow-release volatile Chinese herbal medicine effective components, which is characterized by being prepared by adopting the following scheme one or scheme two;

the first scheme is as follows:

step S11, preparing a Chinese herbal prescription: weighing Chinese herbal materials or Chinese herbal extracts containing volatile Chinese herbal components according to the prescription to obtain Chinese herbal prescription;

step S12, preparing a material to be foamed: blending and plasticizing one or more foamable polymer raw materials and an auxiliary agent uniformly, and then carrying out screw extrusion granulation or extrusion molding to obtain a blank body with a specific shape, namely preparing a material A to be foamed;

step S13, supercritical fluid extraction: putting the Chinese herbal medicine formula prepared in the step S11 and the material A to be foamed prepared in the step S12 into a supercritical reaction kettle, adding water, introducing a supercritical fluid with the pressure of 3.5-30 MPa, and adjusting the temperature in the reaction kettle to 35-T_mExtracting volatile Chinese medicinal components;

step S14, supercritical fluid foaming: after extraction, the temperature in the supercritical reaction kettle is adjusted to (T)_s－5)℃～T_mDEG C; when the extraction temperature is just above (T)_s－5)℃～T_mBetween DEG C, can be (T)_s－5)℃～T_mAdjusting the temperature or keeping the temperature unchanged at the temperature of DEG C; continuously maintaining the pressure until the supercritical fluid is dissolved and saturated in the material A to be foamed, quickly removing the pressure in the supercritical reaction kettle, and quickly expanding the supercritical fluid dissolved in the polymer body to form a polymer foaming material with countless cells; the supercritical fluid in the polymer is decompressed into high-pressure gas and volatile traditional Chinese medicine components which are stored in foam pores of the polymer foam material, and the functional polymer foam material with granular or special shape and the function of slowly releasing the volatile traditional Chinese medicine components is obtained after cooling;

the second scheme is as follows:

step S21, preparing a Chinese herbal prescription: weighing Chinese herbal materials or Chinese herbal extracts containing volatile Chinese herbal components according to the prescription to obtain Chinese herbal prescription;

step S22, preparing a material to be foamed: blending and plasticizing the Chinese herbal medicine formula prepared in the step S21, one or more foamable polymer raw materials and an auxiliary agent uniformly according to a formula, and then carrying out screw extrusion granulation or shaping to obtain a blank body with a specific shape, namely preparing a material B to be foamed;

step S23, supercritical fluid extraction and foaming: the material B to be foamed prepared in the step S22 is put into a supercritical reaction kettle, a proper amount of water is added, a high-pressure supercritical fluid with the pressure of 3.5-30 MPa is introduced, and the temperature in the supercritical reaction kettle is adjusted to (T)_s－5)℃～(T_m+5) DEG C, keeping the pressure until the supercritical fluid is dissolved and saturated in the material A to be foamed, then quickly removing the pressure in the supercritical reaction kettle, and quickly expanding the supercritical fluid and the volatile traditional Chinese medicine components dissolved in the polymer body to form a countless foamed polymer material with foam holes, thus obtaining the granular or special-shaped functional polymer foaming material with the slow-release volatile traditional Chinese medicine components;

wherein, T_sIs the actual softening point, T, of the material to be foamed under the holding pressure_mThe actual melting point of the material to be foamed under the pressure keeping pressure is obtained;

preferably, the supercritical fluid is carbon dioxide, nitrogen, or a mixture of carbon dioxide and nitrogen or air;

optionally, the processing aid comprises a plasticizer, a heat stabilizer, an antioxidant, a light stabilizer, a flame retardant, an antistatic agent, a bacteriostatic and mildewproof agent, a coloring agent, a whitening agent, a filler, a crosslinking agent, a lubricant or a mold release agent.

The invention also provides application of the polymer functional material with the slow-release volatile Chinese herbal medicine effective components in pillow products or sachets or foaming pads.

The invention also provides a pillow product containing the high molecular functional material with the slow-release volatile Chinese herbal medicine effective components, which comprises a pillowcase and a pillow core, and is characterized in that the pillow core completely or partially adopts the high molecular functional material with the slow-release volatile Chinese herbal medicine effective components as a filler.

The invention also provides a sachet product containing the high molecular functional material with the slow release of the volatile Chinese herbal medicine effective components, which is characterized in that the whole or part of the sachet adopts the high molecular functional material with the slow release of the volatile Chinese herbal medicine components.

The invention also provides a foaming cushion product containing the high molecular functional material with the slow release of the volatile Chinese herbal medicine effective components, which is characterized in that the high molecular functional material with the slow release of the volatile Chinese herbal medicine components is adopted wholly or partially when the foaming cushion product is prepared.

Furthermore, the foaming pad products are ground mats, crawling pads, yoga mats, insoles, seat cushions, mattresses and mouse pads.

The scientific principle of the invention is as follows: supercritical fluid means a fluid in a supercritical state when the temperature and pressure of the pure fluid are above its critical temperature and critical pressure, and is referred to as a supercritical fluid, SCF for short. For example, the supercritical fluid of carbon dioxide has a critical temperature of 31.1 ℃ and a critical pressure of 7.39 MPa; the critical temperature and critical pressure of the nitrogen supercritical fluid are-147.0 deg.C and 3.39MPa, respectively. Supercritical fluid cannot be obtained when either of the temperature and pressure parameters is below a critical value. The supercritical fluid has strong solubility and permeability, the supercritical fluid extraction technology developed based on the excellent performance of the supercritical fluid is listed as the optimal extraction and separation technology of the effective components of the traditional Chinese medicine, and has the characteristics of rectification and liquid-liquid extraction, the operation parameters are easy to control, the solvent can be recycled, and the method is particularly suitable for separating heat-sensitive substances. In the technical scheme of the invention, firstly, volatile traditional Chinese medicine active ingredients in traditional Chinese medicine decoction, traditional Chinese medicine powder or traditional Chinese medicine extract are extracted by utilizing the extraction function of supercritical fluid and are dissolved in the supercritical fluid; because the supercritical fluid has strong permeability and dissolubility, the effective components of the Chinese herbal medicines dissolved in the supercritical fluid are dissolved into the high polymer material to be foamed along with the supercritical fluid; in the supercritical extraction process, the addition of water can improve the extraction rate of volatile components which are easily dissolved in water in the Chinese herbal medicine components; meanwhile, a large amount of supercritical fluid is dissolved in water, when the pressure in the reaction kettle is released, the water dissolved with the supercritical fluid is rapidly expanded and gasified, and a large amount of heat needs to be absorbed in the water gasification process. For example, 1mol of water, at 50 ℃ vaporizes with a heat of vaporization of 42780 joules, and at 100 ℃ vaporizes with a heat of vaporization of 40680 joules. Because the heat conduction effect of water is good, the water gasification process can quickly absorb the heat on the surface of the polymer, so that the temperature on the surface of the polymer is suddenly reduced, the material of the polymer surface layer is contracted, and the solubility of the supercritical fluid is quickly reduced; the temperature in the polymer body is still kept unchanged in a short time, the supercritical fluid in the polymer body is rapidly expanded due to the reduction of the ambient pressure around the polymer, the interior of the polymer is expanded into a foaming material with cells with countless closed cell structures, the supercritical fluid is changed into high-pressure gas which is uniformly distributed in the cells of the foaming material together with the effective ingredients of the traditional Chinese medicine dissolved in the supercritical fluid, and the pressure in the cells is higher than the external ambient pressure, namely positive pressure; and the polymer surface layer is shrunk and hardened due to the sudden temperature drop, the dissolving amount of the supercritical fluid is reduced and exceeds the optimal foaming condition, so that the micro-foaming or non-foaming shell layer with low porosity and high density is formed in the area of the polymer surface layer. Because the foam pores of the polymer foaming material are similar to a plurality of small air bags, the pore walls of the small air bags (similar to a high molecular film material) have certain air permeability; under the action of positive pressure, gas in the foam pores, including volatile traditional Chinese medicine components, slowly permeate through the pore walls of the foam pores and gradually permeate outwards. For the same material, the thickness and foaming ratio of the outer shell layer directly determine the release rate of the volatile Chinese herbal medicine components to the environment. The thickness of the formed shell layer is related to the temperature reduction amplitude of the surface of the polymer, and the temperature reduction amplitude is related to the heat absorbed by water. Therefore, the heat absorption amount can be controlled by adjusting the adding amount of water according to actual requirements in production, and the thickness of the shell layer is further adjusted, so that the required permeation speed of the volatile Chinese herbal medicine components is obtained. Therefore, in actual production, the polymer foaming functional materials with different slow release speeds can be flexibly prepared according to the application scene requirements, and the design and manufacture of abundant and diversified products are met.

The functional polymer foaming material with the slow-release volatile traditional Chinese medicine component has a similar core-shell structure without secondary processing, namely the foaming density of the surface layer and the inner core of the foaming material is different, the porosity of the surface layer is low, the density is high, and the slow-release effect is good and controllable; the inner core has high porosity and low density, and has good gas storage effect.

The invention has the beneficial effects that:

the preparation method has the advantages that:

(1) volatile effective components of the Chinese herbal medicines are extracted from the Chinese herbal medicines and dissolved in the polymer foaming material, and form positive pressure mixed gas together with the supercritical fluid gas to be stored in the foaming cells, so that the slow release of the volatile Chinese herbal medicines is realized.

(2) Reduce the damage to the effective components of the traditional Chinese medicine and prevent the loss of the effective components of the traditional Chinese medicine. Chemical foaming requires the use of a blowing agent and a crosslinking agent, which should be used at temperatures above 150 ℃. Therefore, regardless of the softening point and melting point of the polymer, the chemical foaming temperature is 150 ℃ or higher and higher than the melting point of the polymer. Such as the polymer EVA, has a melting point between 60-100 c, while the usual chemical foaming temperature is 165-175 c. For materials with melting points below 150 ℃, the typical chemical foaming temperature of the polymer is between 165 ℃ and 180 ℃. The chemical foaming mold is not completely sealed, so that volatile traditional Chinese medicine components are easy to volatilize and run off at high temperature, and the high temperature can cause damage to the traditional Chinese medicine components sensitive to heat. The foaming temperature of the supercritical fluid foaming is much lower than that of the chemical foaming for the same material, and the foaming temperature of the supercritical fluid is usually selected between the softening point temperature and the melting point temperature of the polymer material, and the deviation is not more than 5 ℃, so that the supercritical fluid foaming has good protection effect on heat-sensitive Chinese herbal medicine components. In addition, the supercritical kettle pressure foaming is carried out in a completely sealed environment, and the supercritical fluid can be recycled, so that the loss of traditional Chinese medicine components and the environmental pollution can not be caused.

Secondly, the polymer functional material with the slow release of the volatile traditional Chinese medicine components has the following advantages:

(1) the volatile Chinese herbal medicine effective components are uniformly dispersed in closed cell structure cells of the foaming material and form positive pressure in the cells together with the supercritical fluid gas; can slowly permeate through the pore walls of the cells under the action of positive pressure and is released into the environment at a relatively uniform speed.

(2) The release speed of the effective components of the volatile Chinese herbal medicines can be flexibly regulated and controlled according to the application scene requirements: the materials are selected and matched according to the air permeability characteristics of different polymer film materials, the foaming multiplying power of the polymer and the wall thickness of the foam holes are adjusted, and the release speed of the volatile traditional Chinese medicine components can be flexibly adjusted and controlled.

(3) The foaming material is green, environment-friendly, recyclable and reusable: by foaming by a physical foaming method, the polymer does not need crosslinking or only needs micro-crosslinking, so the polymer can be recycled and reused. In contrast, in the prior art, a chemical foaming material forms a rigid three-dimensional network structure after complete crosslinking reaction, and the crosslinked structure cannot be repeatedly processed and molded and cannot be recycled in the polymerization process.

(4) Green and environmental protection without pollution: the supercritical fluid is adopted for foaming, no chemical foaming agent or auxiliary foaming agent is required to be added, no toxic and harmful substances or gas is generated, and the preparation method is green and environment-friendly and is very suitable for preparing traditional Chinese medicine health-care products which are closely contacted with human bodies. In contrast, chemical foaming of polymers in the prior art requires the addition of blowing agents, which are mostly azo-type blowing agents. N is released when the foaming agent is decomposed at high temperature₂、CO₂The gas causes the polymer to foam, while NH is also produced₃And formamide noxious gases. Therefore, the traditional Chinese medicine health-care foaming material prepared by the chemical foaming mode has pungent smell and is not environment-friendly enough.

Thirdly, the functional product prepared by adopting the high molecular functional material with the slow release of the volatile traditional Chinese medicine components has the advantages that:

because the product is prepared by adopting the high molecular functional material with excellent performance and sustained release of volatile traditional Chinese medicine components, the product has proper release speed of the effective components of the traditional Chinese medicine, and is green, environment-friendly and pollution-free.

Drawings

FIG. 1 is a microscopic structure of EVA foam.

FIG. 2 is a microscopic structure of the TPU foamed material.

FIG. 3 is a microscopic structure of PP foam.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.

Example 1:

s11, preparing Chinese herbal medicine formulas: the ginseng, the pinellia ternate, the jujube kernel, the poria with hostwood, the angelica, the exocarpium citri rubrum, the red paeony root, the schisandra chinensis and the liquorice are taken according to the prescription, water is added for decoction, dregs are filtered after the decoction, and the residual Chinese herbal medicine decoction is the required Chinese herbal medicine prescription.

S12, preparing a material to be foamed: taking 100 parts of EVA; 10 parts of processing aids, specifically 3 parts of antistatic agent, 5 parts of flame retardant, 1 part of bacteriostatic mildew inhibitor and 1 part of crosslinking agent; and (3) uniformly mixing the materials in an internal mixer, and then granulating by adopting a double-screw granulator to obtain the EVA composite material particles to be foamed.

S13, supercritical fluid extraction: taking 50ml of the Chinese herbal medicine prescription obtained in the step S11 and 200g of the EVA composite material particles to be foamed obtained in the step S12, putting the Chinese herbal medicine prescription and the EVA composite material particles into a supercritical reaction kettle together, adding 50ml of water, introducing carbon dioxide supercritical fluid, controlling the pressure of the supercritical fluid to be 8MPa, and adjusting the temperature in the reaction kettle to be 45 ℃ to extract volatile traditional Chinese medicine components;

s14, supercritical fluid foaming: after extraction, adjusting the temperature in the supercritical reaction kettle to 70 ℃; keeping the temperature and the pressure until the supercritical fluid is dissolved and saturated in the EVA composite material particles to be foamed, quickly releasing the pressure in the reaction kettle, and taking out the EVA foamed particles, namely the granular functional polymer foamed material with the slow-release volatile traditional Chinese medicine components. It has an average density of 0.2g/cm³. As a result, referring to the microscopic structure of the EVA foam of FIG. 1, it can be seen that the shell layer is a low porosity and high density layerThe shell layer has a thickness of 79 μm, the core has low porosity and high density, and the cells have a closed cell structure.

Because of the addition of the bacteriostatic mildew-proof agent, the functional material also has bacteriostatic mildew-proof function. The EVA functional material particle can be used for preparing filling materials with traditional Chinese medicine slow release function for products such as sachet, pillow, cushion, etc. with light health promotion effect.

Because different grades of EVA materials have different softening points and melting points, the addition of processing aids can also affect the softening point and melting point of the polymer composite. In the technical scheme of the invention, the heat preservation temperature is controlled to be (T)_s－5)℃～(T_m+5) DEG C, T_sIs the actual softening point of the material to be foamed, T_mIs the actual melting point of the material to be foamed. Therefore, when the heat preservation temperature parameter is set, the actual measurement value is used as the standard. In this example, the softening point of the blended EVA composite ion was 56 ℃ and the melting point was 72 ℃. Therefore, the holding temperature can be selected from 46 ℃ to 82 ℃. In this example, the temperature was set to 70 ℃.

In actual production, increasing the temperature allows to obtain a foamed material of relatively low density. Can meet the requirements of practical application on performance indexes such as the density of the foaming material, the slow release speed of the volatile traditional Chinese medicine and the like in (T)_s－5)℃～(T_mAdjusting at +5) deg.C. Therefore, in the subsequent examples, the heat preservation temperature is not described one by one.

Example 2:

the difference from the embodiment 1 is that the traditional Chinese medicine formula comprises radix paeoniae alba, dried orange peel, radix rehmanniae recen, cortex phellodendri, cyperus rotundus, rhizoma anemarrhenae, angelica sinensis, hovenia dulcis thunb, poria alba and liquorice, and the formula has the effects of concentrating the mind and calming the mind. Can be used for preparing sachet, pillow, cushion, etc. with light health promotion function.

Example 2 differs from example 1 in that different herbal formulations are used. In fact, the Chinese herbal formulation does not affect the subsequent supercritical extraction and foaming. The average density of the functional polymer foaming material with the slow release of the volatile traditional Chinese medicine components is 0.2g/cm³。

The technical scheme adopted in the embodiment 1 is widely suitable for various Chinese herbal medicine formulas, which is a great advantage of the technical scheme of the invention, namely the application is wide, and different Chinese herbal medicine formulas can be adjusted according to market demands to obtain the polymer foaming material capable of slowly releasing different Chinese herbal medicine components and different functions.

Example 3:

the difference from the embodiment 1 is that: the supercritical fluid has pressure of 15MPa and temperature of 80 deg.C, and the average density of the functional polymer foam material with slow release of volatile Chinese medicinal components is 0.08g/cm³. That is, the expansion ratio of the EVA composite material can be increased by increasing the pressure of the supercritical fluid as compared with example 1.

Example 4

The difference from the embodiment 1 is that: the pressure of the supercritical fluid is 20MPa, and the average density of the functional polymer foaming material with the slow-release volatile traditional Chinese medicine components is 0.068g/cm³. That is, the expansion ratio of the EVA composite material can be increased by increasing the pressure of the supercritical fluid as compared with example 1.

Example 5

The difference from the embodiment 1 is that: the supercritical fluid has pressure of 25MPa and temperature of 50 deg.C, and the average density of the functional polymer foam material with slow release of volatile Chinese medicinal components is 0.06g/cm³. That is, the expansion ratio of the EVA composite material can be increased by increasing the pressure of the supercritical fluid as compared with example 1.

Examples 3 to 5 are different from example 1 in that the foaming is performed by using supercritical fluids of different pressures. The supercritical fluid has strong solubility and can be well dissolved in the foamable polymer. In general, the solubility of the supercritical fluid in the polymer is in a proportional relationship with the pressure, so that the solubility of the supercritical fluid in the polymer to be foamed can be regulated and controlled by changing the holding pressure, and the foamed high-molecular functional materials with different densities can be obtained.

Example 6

The difference from the embodiment 1 is that: the polymer to be foamed is polyolefin elastic and is selected from any one of POE, OBC, TPV and TPO. Super-superThe critical fluid is a supercritical fluid of carbon dioxide and air. The average density of the functional polymer foaming material with the slow release of the volatile traditional Chinese medicine components is 0.176g/cm³、0.181g/cm³、0.25g/cm³、0.22g/cm³。

Example 7

The difference from the embodiment 1 is that: the polymer to be foamed is any one of PP, PE, PS, PC, PVC, ABS or PU materials. The average density of the functional polymer foaming material with the slow release of the volatile traditional Chinese medicine components is 0.33g/cm³、0.21g/cm³、0.25g/cm³、0.25g/cm³、0.19g/cm³、0.28g/cm³、0.188g/cm³。

FIG. 3 is a microscopic structure of PP foam, in which the thickness of the shell layer is about 225 μm, and there are a few pores, and no cells are formed; the foam holes of the core layer are more dense and uniform, and the foam holes are mainly of closed-cell structures.

Example 8

The difference from the embodiment 1 is that: the polymer to be foamed is a TPU material. The average density of the functional polymer foaming material with the slow-release volatile traditional Chinese medicine components is 0.13g/cm 3.

The microstructure of the resulting TPU foam of fig. 2 can be seen as a shell layer of low porosity and high density (as depicted in fig. 2 a); the core porosity is low and the density is high, and the cells are closed cell structures (as shown in figure 2 b).

Example 9

The difference from the embodiment 1 is that: the polymer to be foamed is styrene elastomer, and is selected from TPE, TPR, SIS, SEPS and the like. The average density of the functional polymer foaming material with the slow release of the volatile traditional Chinese medicine components is 0.11g/cm³、0.098g/cm³、0.07/cm³、0.12g/cm³。

Example 10

The difference from the embodiment 1 is that: the polymer to be foamed is a mixed material of EVA and rubber, wherein the EVA accounts for 60-80 parts by weight, and the rubber accounts for 20-40 parts by weight; the rubber is silica gelThe rubber composition is any one of styrene butadiene rubber, nitrile rubber, chlorinated nitrile rubber, butadiene rubber, chloroprene rubber, butyl rubber, isoprene rubber, acrylate rubber, fluororubber, ethylene propylene diene monomer rubber, ethylene propylene rubber and chlorosulfonated polyethylene rubber. According to different rubber materials, the average density of the prepared functional polymer foaming material with the slow-release volatile traditional Chinese medicine components is 0.05-0.53 g/cm³In the meantime.

Examples 6 to 10 are different from example 1 in that different polymer materials are used as base materials of the high molecular functional material.

The technical scheme of the invention has the advantages that the supercritical fluid is adopted for foaming, has strong dissolubility and can be well dissolved in various foamable polymers to form high-pressure fluid in the polymer body, and the supercritical fluid in the polymer body is rapidly expanded after external pressure is rapidly removed to obtain various foamable polymer foaming materials. Due to the different solubility, thermal stability and mechanical strength of different polymers in supercritical fluids, it is possible to obtain foams of different densities at the same foaming pressure. Of course, the required density of the foamed material can be obtained by adjusting parameters such as temperature and pressure.

The functional polymer foaming material with the slow-release volatile traditional Chinese medicine components prepared in the embodiment is continuously prepared into a sheet material with the thickness of 50cm x 70cm x 3 mm. Can be used for manufacturing yoga mats, ground mats, seat cushions and the like.

Example 11

S11, preparing a Chinese herbal medicine prescription. The ginseng, the pinellia ternate, the jujube kernel, the poria with hostwood, the angelica, the exocarpium citri rubrum, the red paeony root, the schisandra chinensis and the liquorice are taken according to the prescription.

And S12, preparing the material to be foamed. And (2) taking 30 parts of SEBS, 20 parts of EPDM, 50 parts of EVA, 1 part of bacteriostatic mildew-proof agent and 0.5 part of crosslinking agent, putting the SEBS, the EPDM, the EVA and the crosslinking agent into an internal mixer, uniformly mixing, and then granulating by adopting a double screw to obtain the SEBS/EPDM/EVA composite material particles.

S13, supercritical fluid extraction: putting 30g of prepared Chinese herbal medicine prescription and 200g of SEBS/EPDM/EVA composite material particles to be foamed into a supercritical reaction kettle together, adding a proper amount of water to prevent the polymer particles from being bonded, introducing nitrogen supercritical fluid, and controlling the pressure of the supercritical fluid to be 10 MPa; adjusting the temperature in the reaction kettle to 35 ℃ to extract volatile traditional Chinese medicine components;

s14, supercritical fluid foaming: after extraction, adjusting the temperature in the supercritical reaction kettle to 84 ℃; keeping the temperature and the pressure until the supercritical fluid is dissolved and saturated in the SEBS/EPDM/EVA composite material particles to be foamed, releasing the pressure in the reaction kettle, and taking out the SEBS/EPDM/EVA foamed particles, namely the SEBS/EPDM/EVA functional material particles with the slow-release volatile traditional Chinese medicine components, wherein the average density of the foamed particles is about 0.075g/cm³。

In this embodiment, the supercritical fluid first extracts the Chinese herbal medicine components, including volatile Chinese herbal medicine components, and then dissolves into the polymer material to be foamed.

Example 12

The difference from example 11 is that: the Chinese herbal medicine prescription adopts wormwood essential oil, and the dosage is 0.1 g. The density was the same as in example 11.

In this embodiment, the supercritical fluid first dissolves the wormwood essential oil in the supercritical fluid, and then the wormwood essential oil and the wormwood essential oil are blended into the polymer body to be foamed, and after the polymer is foamed, the wormwood essential oil is filled in the cells in the polymer body.

Example 13

S21, preparing a Chinese herbal medicine prescription. The ginseng, the pinellia ternate, the jujube kernel, the poria with hostwood, the angelica, the exocarpium citri rubrum, the red paeony root, the schisandra chinensis and the liquorice are taken according to the prescription and ground into powder.

And S22, preparing the material to be foamed. And (2) taking 90 parts of EVA, 10 parts of the Chinese herbal medicine powder prepared in the first step, 1 part of the antibacterial mildew inhibitor, 10 parts of filler diatomite and 0.5 part of the cross-linking agent, putting into an internal mixer, mixing uniformly, and then granulating by adopting a double screw to prepare the EVA composite material particles.

S23, supercritical fluid extraction and foaming: 200g of prepared EVA composite material particles are put into a supercritical reaction kettle, a proper amount of water is added to prevent the polymer particles from being bonded, and then carbon dioxide and nitrogen mixed supercritical fluid is introduced. The carbon dioxide accounts for 70 percentControlling the pressure of the supercritical fluid to be 15 MPa; when the supercritical fluid is dissolved and saturated in the EVA composite material particles to be foamed, releasing the pressure in the reaction kettle, and taking out the EVA foamed particles, namely the functional polymer foamed material particles with the slow-release volatile traditional Chinese medicine components, wherein the average density of the functional polymer foamed material particles is about 0.05g/cm³。

In this embodiment, the supercritical fluid is first blended into the polymer to be foamed, and is also blended into the Chinese herbal medicine powder in the polymer, so as to extract the Chinese herbal medicine components in the Chinese herbal medicine powder. When the pressure in the supercritical reaction kettle is released, the supercritical fluid in the polymer body to be foamed rapidly expands, and the extracted traditional Chinese medicine components are filled in the foam pores of the foaming material.

Due to the addition of the filler diatomite with certain porosity, the pores of the diatomite can be used as a storage space of the supercritical fluid, so that the solubility of the supercritical fluid in the polymer to be foamed is increased, and the foamed particles with ultralow density are obtained. One of the advantages of the technical scheme of the invention is that the dissolving amount of the supercritical fluid in the polymer to be foamed can be changed by adding the filling agent, and the required foaming density is obtained. The density of the foaming materials is different, and the thicknesses of the pore walls of the corresponding cells of the foaming materials are different, so that the speed of releasing the volatile traditional Chinese medicine components in the cells into the air through the pore walls of the cells is different.

The result is the same after the Chinese herbal medicine powder is replaced by the wormwood powder.

Example 14

The difference from example 12 is that: preparing the EVA composite material to be foamed into a sole shape, and preparing the foamed shoe material insole after supercritical foaming. The insole can be used for preparing sports shoes, sandals, etc., and has mosquito repellent effect. The density was the same as in example 11.

Example 15

The difference from the examples 1 to 11 is that the traditional Chinese medicine prescription is wormwood and mint, and volatile traditional Chinese medicine components emitted by the wormwood and the mint have antibacterial and mosquito-repellent effects, so that the prepared foaming polymer functional material with mosquito-repellent and insect-repellent effects can be used.

The functional polymer foaming material with the slow release of the volatile traditional Chinese medicine components prepared in the embodiment is used as a filling substance, and pillow products or sachet products with the light health care function of slow release of the traditional Chinese medicine components, such as throw pillows, back pillows and the like, can be prepared.

The polymer expanded particles prepared in the above examples 12, 14 and 15 were used as a pillow core of a pillow to prepare a pillow having mosquito repellent and insect repellent functions.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.