阅读说明：本技术 一种玻璃纤维聚丙烯界面横晶结构的诱导方法 (Inducing method of glass fiber polypropylene interface transverse crystal structure ) 是由 皮林 吴津田 陈星佑 于 2020-12-17 设计创作，主要内容包括：本发明属于聚合材料技术领域,公开了一种玻璃纤维聚丙烯界面横晶结构的诱导方法,所述玻璃纤维聚丙烯界面横晶结构的诱导方法包括以下步骤：将制备的玻璃纤维进行改性；将改性后的玻璃纤维置于含碳纳米管和聚丙烯成核剂的稳定水性分散液中进行浸泡,得到表面有碳纳米管和聚丙烯成核剂涂层的玻璃纤维；置于干燥箱中干燥,得到聚丙烯/玻璃纤维界面横晶结构。本发明通过对玻璃纤维的处理实现对其改性,然后利用湿法研磨制备碳纳米管和成核剂稳定分散的分散液,采用浸润法将碳纳米管和成核剂同时引入玻璃纤维表面,制备的表面有碳纳米管和聚丙烯成核剂涂层的玻璃纤维的性能更佳；通过对其诱导实现横晶结构的形成,实现诱导的高效性和有效性。(The invention belongs to the technical field of polymer materials, and discloses a method for inducing a glass fiber polypropylene interface transverse crystal structure, which comprises the following steps: modifying the prepared glass fiber; soaking the modified glass fiber in stable aqueous dispersion containing carbon nano tubes and a polypropylene nucleating agent to obtain the glass fiber with the surface coated with the carbon nano tubes and the polypropylene nucleating agent; and (5) drying in a drying oven to obtain the polypropylene/glass fiber interface transverse crystal structure. According to the invention, the glass fiber is modified by treatment, then the dispersion liquid with stably dispersed carbon nanotubes and nucleating agent is prepared by wet grinding, the carbon nanotubes and the nucleating agent are simultaneously introduced to the surface of the glass fiber by an infiltration method, and the prepared glass fiber with the carbon nanotubes and the polypropylene nucleating agent coating on the surface has better performance; the formation of a transverse crystal structure is realized by inducing the transverse crystal structure, and the high efficiency and effectiveness of induction are realized.)

1. The method for inducing the glass fiber polypropylene interface transverse crystal structure is characterized by comprising the following steps of:

step one, preparing glass fiber; soaking the prepared glass fiber in the mixed solution, and performing ultrasonic dispersion with ultrasonic frequency of 50-60kHz and ultrasonic time of 10-25 min; obtaining a dispersion liquid after the ultrasonic treatment is finished, filtering the dispersion liquid, filtering out solid substances, and discarding filtrate; cleaning solid substances for 2-3 times, cleaning surface impurities, putting into a drying box, setting the drying temperature to be 50-65 ℃, and drying for 20-30 min;

the method for preparing the glass fiber comprises the following steps:

(1) weighing 8-12 parts of fly ash, 5-6 parts of red mud, 2-5 parts of blast furnace slag, 2-3 parts of steel fiber, 1-2 parts of borax and 4-5 parts of calcium hydroxide according to parts by mass;

(2) pulverizing, sieving and mixing fly ash, red mud, blast furnace slag, steel fiber, borax and calcium hydroxide to obtain a mixture;

(3) placing the mixture in a reaction kettle, setting the temperature to be 800-950 ℃, carrying out high-temperature melting, cooling at the speed of 100 ℃/min, and cooling to room temperature to obtain a solid substance;

(4) clarifying, homogenizing, molding and cooling the solid substances to obtain glass fibers;

step two, preparing modified nano diatomite; adding the dried substance into an ethanol solution with the volume concentration of 65%, adding vinyl tri-tert-butylperoxysilane, and fully stirring to obtain a dispersion liquid; heating the dispersion, adding modified nano diatomite into the dispersion when the temperature of the dispersion reaches 50 ℃, stirring by using a stirrer at a speed of 80-90r/min, continuously heating while stirring until solid substances in the dispersion are completely dispersed, stopping stirring and stopping heating to obtain a blended solution;

regulating the pH of the blending liquid by using a sodium hydroxide solution, and regulating the pH of the blending liquid to 9-10; standing the blending solution at room temperature for 2-3h to separate out a precipitate; cleaning the precipitate with clear water for 3-5 times, placing the precipitate in a drying box, and drying at 60-65 deg.C for 45-55min to obtain treated fiber glass;

step four, preparing a modifier; soaking the treated glass fiber in a modifier for 2-4 h; heating the glass fiber and the modifier at 35-40 ℃ for 8-15min after soaking, cooling to room temperature, filtering to obtain a solid, and cleaning the solid to obtain the modified glass fiber;

step five, preparing stable aqueous dispersion liquid containing carbon nano tubes and a polypropylene nucleating agent, soaking the modified glass fiber in the dispersion liquid for 16-18h at the soaking temperature of 35-40 ℃, and taking out the glass fiber after soaking to obtain the glass fiber with the carbon nano tubes and the polypropylene nucleating agent coating on the surface;

and sixthly, placing the glass fiber with the carbon nano tube and the polypropylene nucleating agent coating on the surface in a drying box, setting the drying temperature to be 28-35 ℃, and drying for 8-10 hours to obtain the polypropylene/glass fiber interface transverse crystal structure.

2. The method for inducing the transverse crystal structure of the glass fiber polypropylene interface as claimed in claim 1, wherein in the first step, the mixed solution comprises 8-16 parts by mass of lanthanum chloride solution, 2-3 parts by mass of surfactant and 1-2 parts by mass of dispersant.

3. The method for inducing the transverse crystal structure of the glass fiber polypropylene interface as claimed in claim 2, wherein the surfactant is one or a mixture of alkyl glycoside and sodium dodecyl benzene sulfonate.

4. The method for inducing the transverse crystalline structure of the glass fiber polypropylene interface as claimed in claim 2, wherein the dispersing agent is one or more of stearamide, butyl stearate and calcium stearate.

5. The method for inducing the transverse crystalline structure of the glass fiber polypropylene interface according to claim 1, wherein in the second step, the preparation of the modified nano diatomite comprises the following steps:

(1) weighing 30-35 parts of nano kieselguhr, 3-4 parts of disodium ethylene diamine tetraacetate and 50-80 parts of water according to the mass parts;

(2) dispersing disodium ethylene diamine tetraacetate into water to obtain disodium ethylene diamine tetraacetate water solution;

(3) dispersing nano diatomite in an ethylene diamine tetraacetic acid disodium solution, and stirring for 1-2 hours at 40-50 ℃;

(4) and adding zinc sulfate into the dispersion, stirring for 10-15min, filtering, and drying to obtain the modified nano diatomite.

6. The method for inducing the transverse crystalline structure of the glass fiber polypropylene interface according to claim 1, wherein in the second step, the modified nano-diatomite is ball-milled before the modified nano-diatomite is added into the dispersion liquid.

7. The method for inducing the transverse crystalline structure of the glass fiber polypropylene interface according to claim 1, wherein in the third step, after the treated fiber glass is obtained, the treated fiber glass is further subjected to surface treatment by a treatment method comprising:

(1) treating with a coupling agent: carrying out surface treatment on fiber glass by adopting a coupling agent, wherein the structural formula of the coupling agent is as follows: (RO)_X-M-A_yRO is a chain group alkoxy of an inorganic-philic group and reacts with the fiber glass chemically; m represents a central atom; a represents an organic long-chain molecular group which can be stably combined with a central atom and is tangled or reacted with a polymer chain;

(2) acid and alkali candling treatment: the acid-base solution and the surface of the fiber glass are subjected to chemical reaction to form pits or micropores, and when the fiber glass is compounded with a polymer matrix, some molecular chain segments of the polymer can enter the pits or micropores, so that the bonding force between the polymer matrix and a polymer interface is increased;

(3) plasma treatment: the plasma energetic particles and active ions are utilized to react with the surface of the fiber glass, so that the surface components are changed, and slight candling is generated on the surface of the fiber glass, thereby increasing the effective contact surface with the matrix, improving the infiltration condition of the matrix on the surface, and improving the mechanical property of the composite material.

8. The method for inducing the transverse crystalline structure of the glass fiber polypropylene interface according to claim 1, wherein in the fourth step, the preparation of the modifier comprises:

(1) weighing 2-5 parts of sodium oxypropylene sulfonate, 1-2 parts of anhydride and 8-12 parts of deionized water according to the mass parts;

(2) dissolving sodium oxypropylsulfonate in deionized water, and stirring to obtain sodium oxypropylsulfonate water solution;

(3) adding anhydride into the sodium oxypropylene sulfonate aqueous solution, and performing ultrasonic dispersion to obtain a mixed solution;

(4) standing the mixed solution, centrifuging, and taking supernatant, namely the modifier.

9. The method for inducing the transverse crystalline structure of the glass fiber polypropylene interface as claimed in claim 1, wherein in the fifth step, the preparation of the stable aqueous dispersion liquid containing the carbon nanotubes and the polypropylene nucleating agent comprises:

(1) weighing 10-12 parts of carbon nano tube, 3-5 parts of surfactant, 2-4 parts of polypropylene nucleating agent, 4-6 parts of solvent and 15-25 parts of deionized water according to the mass parts;

(2) mixing the weighed raw materials, and placing the mixture in wet grinding equipment;

(3) adding zircon into the grinding equipment, setting the grinding rotation speed at 900-;

(4) and collecting the grinding fluid, and centrifuging to obtain the stable aqueous dispersion containing the carbon nano tube and the polypropylene nucleating agent.

10. The method for inducing the transverse crystalline structure of the glass fiber polypropylene interface according to claim 9, wherein in the step (1), the surfactant is one or a combination of cetyl trimethyl ammonium bromide, sodium dodecyl sulfonate, sodium dodecyl benzene sulfonate and tween 80.

Technical Field

The invention belongs to the technical field of polymer materials, and particularly relates to an induction method of a transverse crystal structure of a glass fiber polypropylene interface.

Background

At present: the glass fiber reinforced polymer composite material is widely applied to the fields of electricity, electronics, energy, automobiles and the like. Modification studies on fiber reinforced polymers have been mainly developed around three aspects of polymer matrix, improvement of the properties of the fiber reinforcement itself, and improvement of the fiber/polymer matrix interface properties. Wherein the fiber/resin interface acts as a bridge between the matrix resin and the fiber, affecting the force transmitted from the matrix to the fiber. The polypropylene is a low-density and semi-crystalline polymer, and with the development of the automobile industry and the improvement of the requirement of automobile light weight, the glass fiber reinforced polypropylene is widely concerned and applied. For the glass fiber reinforced polypropylene material, because polypropylene is a nonpolar polymer and active functional groups are lacked on a macromolecular chain, the interface bonding between the polypropylene and the glass fiber is poor.

The interface improvement of the polypropylene/glass fiber can be realized by inducing the polypropylene to crystallize at the interface of the glass fiber and form a transverse crystal structure. The existence of the transverse crystal structure of the polypropylene/glass fiber interface can improve the combination of the matrix and the fiber and improve the shearing strength of the interface. Commercial glass fibers do not have the ability to induce a transverse crystalline structure in themselves, and nucleating agents may be introduced to the surface of the glass fiber in order to form the transverse crystalline structure. The nucleating agent is a processing aid and can accelerate polypropylene crystallization, increase the density of heterogeneous nucleation points, reduce the crystal size and refine grains. However, the scheme for improving the interface of polypropylene/glass fiber by inducing polypropylene to crystallize at the interface of glass fiber and forming a transverse crystal structure is complex to operate, large-scale production cannot be realized, and the use of the process is limited.

Through the above analysis, the problems and defects of the prior art are as follows: the scheme for realizing the interface improvement of the polypropylene/glass fiber by inducing the polypropylene to crystallize at the glass fiber interface and forming a transverse crystal structure is complex to operate, cannot realize large-scale production, and limits the use of the process.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a method for inducing a transverse crystal structure of a glass fiber polypropylene interface.

The invention is realized in such a way that the method for inducing the glass fiber polypropylene interface transverse crystal structure comprises the following steps:

step one, preparing glass fiber; soaking the prepared glass fiber in the mixed solution, and performing ultrasonic dispersion with ultrasonic frequency of 50-60kHz and ultrasonic time of 10-25 min; obtaining a dispersion liquid after the ultrasonic treatment is finished, filtering the dispersion liquid, filtering out solid substances, and discarding filtrate; cleaning solid substances for 2-3 times, cleaning surface impurities, putting into a drying box, setting the drying temperature to be 50-65 ℃, and drying for 20-30 min;

step two, preparing modified nano diatomite; adding the dried substance into an ethanol solution with the volume concentration of 65%, adding vinyl tri-tert-butylperoxysilane, and fully stirring to obtain a dispersion liquid; heating the dispersion, adding modified nano diatomite into the dispersion when the temperature of the dispersion reaches 50 ℃, stirring by using a stirrer at a speed of 80-90r/min, continuously heating while stirring until solid substances in the dispersion are completely dispersed, stopping stirring and stopping heating to obtain a blended solution;

regulating the pH of the blending liquid by using a sodium hydroxide solution, and regulating the pH of the blending liquid to 9-10; standing the blending solution at room temperature for 2-3h to separate out a precipitate; cleaning the precipitate with clear water for 3-5 times, placing the precipitate in a drying box, and drying at 60-65 deg.C for 45-55min to obtain treated fiber glass;

step four, preparing a modifier; soaking the treated glass fiber in a modifier for 2-4 h; heating the glass fiber and the modifier at 35-40 ℃ for 8-15min after soaking, cooling to room temperature, filtering to obtain a solid, and cleaning the solid to obtain the modified glass fiber;

step five, preparing stable aqueous dispersion liquid containing carbon nano tubes and a polypropylene nucleating agent, soaking the modified glass fiber in the dispersion liquid for 16-18h at the soaking temperature of 35-40 ℃, and taking out the glass fiber after soaking to obtain the glass fiber with the carbon nano tubes and the polypropylene nucleating agent coating on the surface;

and sixthly, placing the glass fiber with the carbon nano tube and the polypropylene nucleating agent coating on the surface in a drying box, setting the drying temperature to be 28-35 ℃, and drying for 8-10 hours to obtain the polypropylene/glass fiber interface transverse crystal structure.

Further, in the first step, the preparing of the glass fiber comprises:

(1) weighing 8-12 parts of fly ash, 5-6 parts of red mud, 2-5 parts of blast furnace slag, 2-3 parts of steel fiber, 1-2 parts of borax and 4-5 parts of calcium hydroxide according to parts by mass;

(2) pulverizing, sieving and mixing fly ash, red mud, blast furnace slag, steel fiber, borax and calcium hydroxide to obtain a mixture;

(3) placing the mixture in a reaction kettle, setting the temperature to be 800-950 ℃, carrying out high-temperature melting, cooling at the speed of 100 ℃/min, and cooling to room temperature to obtain a solid substance;

(4) and clarifying, homogenizing, molding and cooling the solid substances to obtain the glass fiber.

Further, in the first step, the mixed solution is composed of 8-16 parts by mass of lanthanum chloride solution, 2-3 parts by mass of surfactant and 1-2 parts by mass of dispersant.

Further, the surfactant is one of alkyl glycoside or sodium dodecyl benzene sulfonate or a mixture of the two.

Further, the dispersing agent is one or a mixture of more of stearamide, butyl stearate and calcium stearate.

Further, in the second step, the preparation of the modified nano diatomite comprises:

(1) weighing 30-35 parts of nano kieselguhr, 3-4 parts of disodium ethylene diamine tetraacetate and 50-80 parts of water according to the mass parts;

(2) dispersing disodium ethylene diamine tetraacetate into water to obtain disodium ethylene diamine tetraacetate water solution;

(3) dispersing nano diatomite in an ethylene diamine tetraacetic acid disodium solution, and stirring for 1-2 hours at 40-50 ℃;

(4) and adding zinc sulfate into the dispersion, stirring for 10-15min, filtering, and drying to obtain the modified nano diatomite.

Further, in the second step, before the modified nano-diatomite is added into the dispersion liquid, ball milling is carried out on the modified nano-diatomite.

Further, in step four, the preparation of the modifier comprises:

(1) weighing 2-5 parts of sodium oxypropylene sulfonate, 1-2 parts of anhydride and 8-12 parts of deionized water according to the mass parts;

(2) dissolving sodium oxypropylsulfonate in deionized water, and stirring to obtain sodium oxypropylsulfonate water solution;

(3) adding anhydride into the sodium oxypropylene sulfonate aqueous solution, and performing ultrasonic dispersion to obtain a mixed solution;

(4) standing the mixed solution, centrifuging, and taking supernatant, namely the modifier.

Further, in step five, the preparation of the stable aqueous dispersion containing the carbon nanotubes and the polypropylene nucleating agent comprises:

(1) weighing 10-12 parts of carbon nano tube, 3-5 parts of surfactant, 2-4 parts of polypropylene nucleating agent, 4-6 parts of solvent and 15-25 parts of deionized water according to the mass parts;

(2) mixing the weighed raw materials, and placing the mixture in wet grinding equipment;

(3) adding zircon into the grinding equipment, setting the grinding rotation speed at 900-;

(4) and collecting the grinding fluid, and centrifuging to obtain the stable aqueous dispersion containing the carbon nano tube and the polypropylene nucleating agent.

Further, in the step (1), the surfactant is one or a combination of more of cetyl trimethyl ammonium bromide, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and tween 80.

Further, in the third step, after the treated fiber glass is obtained, the treated fiber glass is further subjected to surface treatment, and the adopted treatment method comprises the following steps:

(1) treating with a coupling agent: carrying out surface treatment on fiber glass by adopting a coupling agent, wherein the structural formula of the coupling agent is as follows: (RO)_X-M-A_yRO is a chain group alkoxy of an inorganic-philic group and reacts with the fiber glass chemically; m represents a central atom; a represents an organic long-chain molecular group which can be stably combined with a central atom and is tangled or reacted with a polymer chain;

(2) acid and alkali candling treatment: the acid-base solution and the surface of the fiber glass are subjected to chemical reaction to form pits or micropores, and when the fiber glass is compounded with a polymer matrix, some molecular chain segments of the polymer can enter the pits or micropores, so that the bonding force between the polymer matrix and a polymer interface is increased;

(3) plasma treatment: the plasma energetic particles and active ions are utilized to react with the surface of the fiber glass, so that the surface components are changed, and slight candling is generated on the surface of the fiber glass, thereby increasing the effective contact surface with the matrix, improving the infiltration condition of the matrix on the surface, and improving the mechanical property of the composite material.

By combining all the technical schemes, the invention has the advantages and positive effects that: according to the invention, the glass fiber is modified by treatment, then the dispersion liquid with stably dispersed carbon nanotubes and nucleating agent is prepared by wet grinding, the carbon nanotubes and the nucleating agent are simultaneously introduced to the surface of the glass fiber by an infiltration method, and the prepared glass fiber with the carbon nanotubes and the polypropylene nucleating agent coating on the surface has better performance; the formation of a transverse crystal structure is realized by inducing the transverse crystal structure, and the high efficiency and effectiveness of induction are realized. The induction method is simple and feasible, and can realize large-scale production.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.

Fig. 1 is a flowchart of a method for inducing a transverse crystalline structure at an interface of a glass fiber polypropylene according to an embodiment of the present invention.

FIG. 2 is a flow chart for carrying out the preparation of glass fibers as provided by an embodiment of the present invention.

Fig. 3 is a flow chart for preparing modified nano diatomite according to the embodiment of the present invention.

FIG. 4 is a flow chart for carrying out the preparation of the modifier provided by the example of the present invention.

FIG. 5 is a flow chart for conducting the preparation of a stable aqueous dispersion containing carbon nanotubes and a polypropylene nucleating agent as provided by an embodiment of the present invention.

Fig. 6 is a flow chart of a method for further surface treatment of the treated fiberglass according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Aiming at the problems in the prior art, the invention provides a method for inducing a transverse crystal structure of a glass fiber polypropylene interface, and the invention is described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the method for inducing the transverse crystalline structure of the glass fiber polypropylene interface provided by the embodiment of the present invention includes the following steps:

s101, preparing glass fibers; soaking the prepared glass fiber in the mixed solution, and performing ultrasonic dispersion with ultrasonic frequency of 50-60kHz and ultrasonic time of 10-25 min; obtaining a dispersion liquid after the ultrasonic treatment is finished, filtering the dispersion liquid, filtering out solid substances, and discarding filtrate; cleaning solid substances for 2-3 times, cleaning surface impurities, putting into a drying box, setting the drying temperature to be 50-65 ℃, and drying for 20-30 min;

s102, preparing modified nano diatomite; adding the dried substance into an ethanol solution with the volume concentration of 65%, adding vinyl tri-tert-butylperoxysilane, and fully stirring to obtain a dispersion liquid; heating the dispersion, adding modified nano diatomite into the dispersion when the temperature of the dispersion reaches 50 ℃, stirring by using a stirrer at a speed of 80-90r/min, continuously heating while stirring until solid substances in the dispersion are completely dispersed, stopping stirring and stopping heating to obtain a blended solution;

s103, adjusting the pH of the blending liquid by using a sodium hydroxide solution, and adjusting the pH of the blending liquid to 9-10; standing the blending solution at room temperature for 2-3h to separate out a precipitate; cleaning the precipitate with clear water for 3-5 times, placing the precipitate in a drying box, and drying at 60-65 deg.C for 45-55min to obtain treated fiber glass;

s104, preparing a modifier; soaking the treated glass fiber in a modifier for 2-4 h; heating the glass fiber and the modifier at 35-40 ℃ for 8-15min after soaking, cooling to room temperature, filtering to obtain a solid, and cleaning the solid to obtain the modified glass fiber;

s105, preparing a stable aqueous dispersion liquid containing the carbon nano tubes and the polypropylene nucleating agent, soaking the modified glass fiber in the dispersion liquid for 16-18h at the soaking temperature of 35-40 ℃, and taking out the glass fiber after soaking to obtain the glass fiber with the carbon nano tubes and the polypropylene nucleating agent coating on the surface;

s106, placing the glass fiber with the carbon nano tube and the polypropylene nucleating agent coating on the surface in a drying box, setting the drying temperature to be 28-35 ℃, and drying for 8-10 hours to obtain the polypropylene/glass fiber interface transverse crystal structure.

As shown in fig. 2, in step S101, the preparation of the glass fiber according to the embodiment of the present invention includes:

s201, weighing 8-12 parts of fly ash, 5-6 parts of red mud, 2-5 parts of blast furnace slag, 2-3 parts of steel fiber, 1-2 parts of borax and 4-5 parts of calcium hydroxide according to parts by weight;

s202, crushing, screening and mixing the fly ash, the red mud, the blast furnace slag, the steel fiber, the borax and the calcium hydroxide to obtain a mixture;

s203, placing the mixture in a reaction kettle, setting the temperature to be 800-;

and S204, clarifying, homogenizing, molding and cooling the solid substances to obtain the glass fiber.

In step S101, the mixed solution provided in the embodiment of the present invention is composed of, by mass, 8 to 16 parts of a lanthanum chloride solution, 2 to 3 parts of a surfactant, and 1 to 2 parts of a dispersant.

The surfactant provided by the embodiment of the invention is one or a mixture of two of alkyl glycoside or sodium dodecyl benzene sulfonate.

The dispersing agent provided by the embodiment of the invention is one or a mixture of more of stearamide, butyl stearate and calcium stearate.

As shown in fig. 3, in step S102, the preparation of the modified nano-diatomaceous earth provided by the embodiment of the present invention includes:

s301, weighing 30-35 parts of nano kieselguhr, 3-4 parts of disodium ethylene diamine tetraacetate and 50-80 parts of water according to the mass parts;

s302, dispersing disodium ethylene diamine tetraacetate into water to obtain a disodium ethylene diamine tetraacetate water solution;

s303, dispersing the nano kieselguhr into an ethylene diamine tetraacetic acid disodium water solution, and stirring for 1-2 hours at the temperature of 40-50 ℃;

s304, adding zinc sulfate into the dispersion liquid, stirring for 10-15min, filtering, and drying to obtain the modified nano kieselguhr.

In step S102, before adding the modified nano-diatomaceous earth into the dispersion liquid provided in the embodiment of the present invention, ball milling is performed on the modified nano-diatomaceous earth.

As shown in fig. 4, in step S104, the preparation of the modifier provided in the embodiment of the present invention includes:

s401, weighing 2-5 parts of sodium oxypropylene sulfonate, 1-2 parts of anhydride and 8-12 parts of deionized water in parts by mass;

s402, dissolving sodium oxypropylene sulfonate in deionized water, and uniformly stirring to obtain a sodium oxypropylene sulfonate aqueous solution;

s403, adding acid anhydride into the sodium oxypropylene sulfonate aqueous solution, and performing ultrasonic dispersion to obtain a mixed solution;

s404, standing and centrifuging the mixed solution, and taking supernatant, namely the modifier.

As shown in fig. 5, in step S105, the preparation of the stable aqueous dispersion containing carbon nanotubes and a polypropylene nucleating agent provided by the embodiment of the present invention includes:

s501, weighing 10-12 parts of carbon nano tubes, 3-5 parts of surfactant, 2-4 parts of polypropylene nucleating agent, 4-6 parts of solvent and 15-25 parts of deionized water according to parts by mass;

s502, mixing the weighed raw materials, and placing the mixture in wet grinding equipment;

s503, adding zircon into the grinding equipment, setting the grinding rotating speed at 900-;

s504, collecting the grinding fluid, and centrifuging to obtain the stable aqueous dispersion containing the carbon nano tube and the polypropylene nucleating agent.

In step S501, the surfactant provided in the embodiment of the present invention is one or a combination of more of cetyltrimethylammonium bromide, sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, and tween 80.

As shown in fig. 6, in step S103 according to the embodiment of the present invention, after the treated fiber glass is obtained, the treated fiber glass is further subjected to surface treatment by a treatment method including:

s601, coupling agent treatment: carrying out surface treatment on fiber glass by adopting a coupling agent, wherein the structural formula of the coupling agent is as follows: (RO)_X-M-A_yRO is a chain group alkoxy of an inorganic-philic group and reacts with the fiber glass chemically; m represents a central atom; a represents an organic long-chain molecular group which can be stably combined with a central atom and is tangled or reacted with a polymer chain;

s602, acid-base candle etching treatment: the acid-base solution and the surface of the fiber glass are subjected to chemical reaction to form pits or micropores, and when the fiber glass is compounded with a polymer matrix, some molecular chain segments of the polymer can enter the pits or micropores, so that the bonding force between the polymer matrix and a polymer interface is increased;

s603, plasma treatment: the plasma energetic particles and active ions are utilized to react with the surface of the fiber glass, so that the surface components are changed, and slight candling is generated on the surface of the fiber glass, thereby increasing the effective contact surface with the matrix, improving the infiltration condition of the matrix on the surface, and improving the mechanical property of the composite material.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention disclosed herein, which is within the spirit and principle of the present invention, should be covered by the present invention.