阅读说明：本技术 一种再生抑菌纤维非织造布及其制备方法与应用 (Regenerated antibacterial fiber non-woven fabric and preparation method and application thereof ) 是由 张力平 王天浩 张甲戌 朱颖 于 2021-05-06 设计创作，主要内容包括：本发明涉及一种再生抑菌纤维非织造布及其制备方法与应用。该方法以纤维素浆粕、纳米氧化锌与各类天然抑菌剂为原料,所述纤维素浆粕和纳米氧化锌的重量比为20:1-3,所述纤维素浆粕和儿茶素的重量比为20:1-2,所述纤维素浆粕和苦参碱的重量比为20:1-2,所述纤维素浆粕和α-薄荷醇的重量比为20:1-2。本发明采用纤维素为原料,可以实现农业废弃物的可再生利用,减少环境污染、资源浪费等问题,同时,再生纤维素纤维属于可降解材料,可以有效减轻环境压力,并且通过掺杂纳米氧化锌与天然抑菌剂,大大提高了再生纤维的抑菌性能,可以广泛应用于医护防护领域。(The invention relates to a regenerated antibacterial fiber non-woven fabric and a preparation method and application thereof. The method takes cellulose pulp, nano zinc oxide and various natural bacteriostatic agents as raw materials, the weight ratio of the cellulose pulp to the nano zinc oxide is 20:1-3, the weight ratio of the cellulose pulp to catechin is 20:1-2, the weight ratio of the cellulose pulp to matrine is 20:1-2, and the weight ratio of the cellulose pulp to alpha-menthol is 20: 1-2. The invention adopts cellulose as raw material, can realize the renewable utilization of agricultural wastes, reduce the problems of environmental pollution, resource waste and the like, simultaneously, the regenerated cellulose fiber belongs to degradable material, can effectively reduce the environmental pressure, greatly improves the bacteriostatic performance of the regenerated fiber by doping nano zinc oxide and natural bacteriostatic agent, and can be widely applied to the field of medical care protection.)

1. A regenerated antibacterial fiber spinning solution comprises cellulose pulp, nanometer zinc oxide, catechin, matrine, alpha-menthol and ionic liquid;

preferably, in the raw materials of the spinning dope of the regenerated antibacterial fiber, the weight ratio of the cellulose pulp to the nano-zinc oxide is 20:1-3, the weight ratio of the cellulose pulp to the catechin is 20:1-2, the weight ratio of the cellulose pulp to the matrine is 20:1-2, and the weight ratio of the cellulose pulp to the alpha-menthol is 20: 1-2; the weight ratio of the cellulose pulp to the ionic liquid is 1: 9-24.

2. The regenerated bacteriostatic fiber spinning dope of claim 1, wherein said cellulose pulp is a bamboo cellulose pulp; and/or the presence of a gas in the gas,

the cellulose content in the cellulose pulp is not lower than 90%, and the lignin content is not lower than 1%; among them, the content of α -cellulose in the cellulose is preferably not less than 80%.

3. The regenerated bacteriostatic fiber spinning dope of claim 1 or 2, wherein,

the purity of the catechin is more than or equal to 99 percent; and/or the presence of a gas in the gas,

the purity of the matrine is more than or equal to 98 percent; and/or the presence of a gas in the gas,

the purity of the alpha-menthol is more than or equal to 98 percent; and/or the presence of a gas in the gas,

the cation in the ionic liquid is alkyl imidazole ion, and the anion is CF₃COO^-。

4. A method of preparing a regenerated bacteriostatic fibre spinning dope according to any one of claims 1 to 3, comprising: mixing nano zinc oxide, catechin, matrine, alpha-menthol and ionic liquid according to a ratio to form a cellulose solvent; the cellulose pulp is then mixed with the cellulose solvent.

5. The preparation method according to claim 4, wherein the nano zinc oxide, catechin, matrine, alpha-menthol and ionic liquid are mixed and then subjected to ultrasonic treatment at room temperature for 1-2h to prepare a cellulose solvent; and/or the presence of a gas in the gas,

when the cellulose pulp and the cellulose solvent are mixed, stirring for 6-10h at the speed of 400-600r/min at the temperature of 30-60 ℃; preferably, the cellulose pulp and the cellulose solvent are mixed and stirred for 5-8h at the temperature of 50-60 ℃ and the speed of 450-550 r/min; and/or the presence of a gas in the gas,

the preparation method of the regenerated antibacterial fiber spinning solution further comprises the step of carrying out ultrasonic defoaming treatment after the cellulose pulp and the cellulose solvent are mixed, wherein the temperature of the ultrasonic defoaming treatment is preferably 30-60 ℃, the power is preferably 175-225W, and the time is preferably 18-30 h; more preferably, the temperature of the ultrasonic defoaming treatment is 50-60 ℃, the power is 180-200W, and the time is 18-24 h.

6. A regenerated bacteriostatic fibre spinning dope prepared according to the method of claim 4 or 5.

7. A regenerated bacteriostatic fiber prepared from the spinning dope of the regenerated bacteriostatic fiber according to any one of claims 1 to 3 and 6.

8. A method for preparing regenerated antibacterial fiber, which comprises the steps of carrying out dry-jet wet spinning on the spinning solution of the regenerated antibacterial fiber according to any one of claims 1-3 and 6 to prepare the regenerated antibacterial fiber;

preferably, the spinning temperature is 40-70 ℃, more preferably 50-60 ℃.

9. A regenerated bacteriostatic non-woven fabric made from the regenerated bacteriostatic fiber of claim 8.

10. A preparation method of a regenerated antibacterial fiber non-woven fabric comprises the following steps:

opening, carding, lapping, pre-wetting, high pressure hydroentangling, drying and sizing the regenerated bacteriostatic fiber of claim 8, and slitting and winding.

Technical Field

The invention relates to a regenerated cellulose fiber, in particular to a regenerated antibacterial fiber non-woven fabric and a preparation method and application thereof.

Background

With the improvement of science and technology and the improvement of living standard, people have higher and higher requirements on comfort, air permeability, safety, antibacterial property and the like of textiles. The traditional bacteriostatic fiber product is generally made of non-renewable and non-degradable petroleum base, and the long-term use of the traditional bacteriostatic fiber product in large quantities causes great environmental stress. Therefore, the regenerated antibacterial fiber and the regenerated antibacterial fiber non-woven fabric are strongly concerned in the field of medical protection. The regenerated antibacterial fiber has the characteristics of wide raw material source, high strength, easy degradation, no pollution and the like. However, the regenerated antibacterial fiber also has the defects of short antibacterial aging, easy falling of the antibacterial agent, weak antibacterial performance and the like. Therefore, it is necessary to continue research on regenerated bacteriostatic fibers.

Disclosure of Invention

The invention firstly provides a regenerated antibacterial fiber spinning solution, which comprises cellulose pulp, nano zinc oxide, catechin, matrine, alpha-menthol and ionic liquid.

In the case of bacteriostatic fiber products, some bacteriostatic agents can play a bacteriostatic role, but are difficult to be compatible with other aspects of regenerated cellulose fiber materials. If the bamboo charcoal is added, the strength of the antibacterial fiber product is obviously reduced, which affects the mechanical property of the material; the addition of nanogold or nanosilver, in turn, can result in excessive material production costs.

The inventor finds that after nano zinc oxide is added into regenerated cellulose fiber, the antibacterial performance and the elongation at break of the regenerated cellulose fiber are both obviously improved. After the nano zinc oxide is added, the antibacterial performance of the regenerated cellulose fiber is improved, and other performances of the regenerated cellulose fiber material are not influenced too much.

In some embodiments, in the raw material of the spinning dope of the regenerated bacteriostatic fibers, the weight ratio of the cellulose pulp to the nano-zinc oxide is 20:1-3, the weight ratio of the cellulose pulp to the catechin is 20:1-2, the weight ratio of the cellulose pulp to the matrine is 20:1-2, and the weight ratio of the cellulose pulp to the alpha-menthol is 20: 1-2;

in some embodiments, the weight ratio of the cellulose pulp to the ionic liquid is 1 (9-24), e.g., 6 (92-93).

Further research shows that the raw materials in the above proportion range can give good consideration to the antibacterial performance and the mechanical properties of the materials, and the overall practicability of the composite material is improved.

In some embodiments, the cellulose pulp is a bamboo cellulose pulp. Compared with other fibers, the bamboo fiber has the antibacterial capability, so that the integral antibacterial performance of the fiber can be further improved. In addition, the bamboo grows rapidly, has good reproducibility, and can be planted sustainably.

In some embodiments, the cellulose pulp (e.g., bamboo cellulose pulp) has a cellulose content of no less than 90%, a lignin content of no less than 1%; among them, the content of α -cellulose in the cellulose is preferably not less than 80%.

In some embodiments, the purity of the nano zinc oxide is more than or equal to 99%.

In some embodiments, the nano zinc oxide has a particle size of 50 ± 10 nm.

In some embodiments, the catechins are greater than or equal to 99% pure (HPLC method). The catechin can be purified by solvent extraction.

In some embodiments, the matrine has a purity of 98% or more (HPLC method), and the matrine can be purified by ethanol reflux extraction.

In some embodiments, the alpha-menthol has a purity of 98% or greater.

The inventor researches and discovers that the catechin, the matrine and the alpha-menthol are more favorable for improving the dispersibility of the bacteriostatic agent in the ionic liquid within the purity range, and further improve the bacteriostatic performance of the bacteriostatic fiber.

In some embodiments, the cation in the ionic liquid is an alkylimidazolium ion and the anion is CF₃COO^-The purity is more than or equal to 95 percent.

Herein, the ionic liquid mainly functions as a solvent.

In addition, the ionic liquid has high solubility to cellulose, and can dissolve 5-12 wt% of cellulose at a lower temperature (55-75 ℃), which is very helpful for maintaining antibacterial performance. The common alkaline-urinary system needs to dissolve cellulose at-5 ℃ to-10 ℃, while the NMMO system needs to dissolve cellulose at 80 ℃ to 120 ℃, which may cause some unpredictable damage to the bacteriostatic agent, resulting in the reduction of bacteriostatic performance.

In some embodiments, the regenerated bacteriostatic fiber spinning solution is prepared from cellulose pulp, nano-zinc oxide, catechin, matrine, alpha-menthol and ionic liquid.

The invention also provides a preparation method of the regenerated antibacterial fiber spinning solution, which comprises the following steps:

mixing nano zinc oxide, catechin, matrine, alpha-menthol and ionic liquid according to a ratio to form a cellulose solvent; the cellulose pulp is then mixed with the cellulose solvent.

In some embodiments, the nano zinc oxide, catechin, matrine, alpha-menthol and the ionic liquid are mixed and then subjected to ultrasonic treatment at room temperature for 1-2 hours to form the cellulose solvent. The ultrasonic can improve the dispersibility of the bacteriostatic agent in the ionic liquid, and further improve the bacteriostatic property of the fiber.

In some embodiments, the cellulose pulp is mixed with the cellulose solvent at a temperature of 30-60 ℃ and stirred at a rate of 400-600r/min for 6-10 h. Preferably, the cellulose pulp is mixed with the cellulose solvent and stirred at a speed of 450-550r/min for 5-8h at a temperature of 50-60 ℃. Thus being more beneficial to fully dissolving the cellulose and further improving the mechanical property.

In some embodiments, the preparation method of the regenerated bacteriostatic fiber spinning solution further comprises a step of performing ultrasonic defoaming treatment after the cellulose pulp and the cellulose solvent are mixed, wherein the temperature of the ultrasonic defoaming treatment is preferably 30-60 ℃, the power is preferably 175-225W, and the time is preferably 18-30 h. More preferably, the temperature of the ultrasonic defoaming treatment is 50-60 ℃, the power is 180-200W, and the time is 18-24 h. The main purpose of deaeration is to remove air bubbles contained in the spinning solution before spinning to ensure that the subsequent spinning process can be performed normally. If the fiber is not defoamed, the fiber is frequently broken, so that the spinning cannot be normally performed.

The spinning dope of the regenerated antibacterial fiber with excellent performance can be obtained by the treatment.

The invention also provides the regenerated antibacterial fiber spinning solution prepared by the method.

The invention also provides application of the regenerated antibacterial fiber spinning solution in preparation of regenerated antibacterial fibers.

The invention also provides a regenerated antibacterial fiber which is prepared from the regenerated antibacterial fiber spinning solution.

In some embodiments, the regenerated antibacterial fiber spinning solution is used as a raw material, and a blending method is adopted to prepare the regenerated antibacterial fiber. Research shows that compared with a post-finishing method, the blending method can wrap the bacteriostatic agent in the regenerated bacteriostatic fiber, so that the bacteriostatic aging of the regenerated fiber can be obviously improved.

The invention also provides a preparation method of the regenerated antibacterial fiber, which comprises the step of spinning the regenerated antibacterial fiber spinning solution by a dry-jet wet method. In some embodiments, the temperature of the spinning is 40-70 ℃, preferably 50-60 ℃, e.g., 55 ℃.

The invention also provides application of the regenerated antibacterial fiber in preparing regenerated antibacterial fiber non-woven fabric.

The invention also provides a regenerated antibacterial fiber non-woven fabric which is prepared from the regenerated antibacterial fiber.

The invention also provides a preparation method of the regenerated antibacterial fiber non-woven fabric, which comprises the following steps:

opening the regenerated antibacterial fiber, carding into a net, lapping, pre-wetting, spunlacing at high pressure, drying, shaping, slitting and winding.

In some embodiments, it is preferred that the carding step uses a roller card.

In some embodiments, it is preferred that the lapping step is cross lapping.

In some embodiments, it is preferred that the high pressure hydroentangling step be a forward and reverse hydroentangling process, and that the hydroentangling pressure be in the range of 5 to 7 MPa.

As a preferred scheme of the invention, the preparation method of the regenerated antibacterial fiber non-woven fabric comprises the following steps:

1) mixing nano zinc oxide, catechin, matrine, alpha-menthol and ionic liquid according to a ratio to form a cellulose solvent;

stirring the cellulose pulp and the cellulose solvent at the temperature of 50-60 ℃ for 5-8h at the speed of 450-550 r/min; then placing the mixture at the temperature of 50-60 ℃ and performing ultrasonic defoaming for 18-24h at the power of 180-200W to obtain regenerated antibacterial fiber spinning solution; wherein the weight ratio of the cellulose pulp to the ionic liquid is 1: 9-24;

2) spinning the regenerated antibacterial fiber spinning solution by a dry-jet wet method to prepare fibers, wherein the spinning temperature is 50-60 ℃;

3) and opening the regenerated antibacterial fiber, carding into a web by using a roller card, adopting a cross lapping mode, pre-wetting, carrying out forward and backward high-pressure spunlace, keeping the pressure at 5-7MPa, drying, shaping, slitting and winding after the spunlace is finished, and finally obtaining a regenerated antibacterial fiber non-woven fabric product.

The invention also provides the regenerated antibacterial fiber non-woven fabric prepared by the method.

The invention also provides application of the regenerated antibacterial fiber non-woven fabric in the field of medical protection.

The invention also provides a product prepared from the regenerated antibacterial fiber non-woven fabric, wherein the product comprises clothes, a mask, protective clothing, a disposable medical equipment packaging material and the like.

Experiments show that the antibacterial performance of the regenerated antibacterial fiber and the regenerated antibacterial fiber non-woven fabric prepared from the regenerated antibacterial fiber is greatly improved, the antibacterial agent is not easy to fall off, and the antibacterial effect is long. After ten washing tests, the antibacterial rate of the regenerated antibacterial fiber non-woven fabric prepared by the invention can still be kept above 50%.

Detailed Description

The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

The following bamboo cellulose pulp was purchased from Jilin chemical fiber group, Inc., and had a degree of polymerization of 728, alpha-cellulose of 82.6%, moisture of 5.6%, cellulose of 92.8%, hemicellulose of 2.3%, and lignin of 4.5%.

The ionic liquid has alkyl imidazole as cation and CF as anion₃COO^-The purity is more than or equal to 95 percent (TCI Chishiai (Shanghai) chemical industry development limited company).

The purity of the nano zinc oxide used in the method is more than or equal to 99 percent, and the particle size is 50 +/-10 nm (Shanghai Michelin Biochemical technology Co., Ltd.).

The catechin used below is purified by ethanol reflux, and the purity is more than or equal to 99 percent (Selenegia zeylanicum Biotech Co., Ltd.) according to a high performance liquid chromatography test.

The matrine used below is purified by ethanol reflux, and the purity is more than or equal to 98% by high performance liquid chromatography (Xiantongze biotechnology, Inc.).

The purity of the alpha-menthol used below is not less than 98% (Shanghai Michelin Biochemical technology Co., Ltd.).

Example 1

1) 0.30g of nano zinc oxide, 0.30g of catechin, 0.30g of matrine and 0.30g of alpha-menthol are taken to be ultrasonically dispersed in 92.8g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 2

1) 0.45g of nano zinc oxide, 0.30g of catechin, 0.30g of matrine and 0.30g of alpha-menthol are taken to be ultrasonically dispersed in 92.65g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 3

1) 0.60g of nano zinc oxide, 0.30g of catechin, 0.30g of matrine and 0.30g of alpha-menthol are taken to be ultrasonically dispersed in 92.5g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 4

1) 0.75g of nano zinc oxide, 0.30g of catechin, 0.30g of matrine and 0.30g of alpha-menthol are ultrasonically dispersed in 92.35g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 5

1) 0.90g of nano zinc oxide, 0.30g of catechin, 0.30g of matrine and 0.30g of alpha-menthol are taken to be ultrasonically dispersed in 92.2g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 6

1) 0.6g of nano zinc oxide, 0.45g of catechin, 0.30g of matrine and 0.30g of alpha-menthol are ultrasonically dispersed in 92.35g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 7

1) 0.6g of nano zinc oxide, 0.6g of catechin, 0.30g of matrine and 0.30g of alpha-menthol are ultrasonically dispersed in 92.20g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 8

1) 0.6g of nano zinc oxide, 0.30g of catechin, 0.45g of matrine and 0.30g of alpha-menthol are ultrasonically dispersed in 92.35g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 9

1) 0.6g of nano zinc oxide, 0.30g of catechin, 0.6g of matrine and 0.30g of alpha-menthol are ultrasonically dispersed in 92.20g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 10

1) 0.6g of nano zinc oxide, 0.30g of catechin, 0.30g of matrine and 0.45g of alpha-menthol are ultrasonically dispersed in 92.35g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Example 11

1) 0.6g of nano zinc oxide, 0.30g of catechin, 0.30g of matrine and 0.6g of alpha-menthol are ultrasonically dispersed in 92.20g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Comparative example 1

1) 0.30g of catechin, 0.30g of matrine and 0.30g of alpha-menthol are taken and ultrasonically dispersed in 93.1g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Comparative example 2

1) 0.6g of nano zinc oxide, 0.30g of matrine and 0.30g of alpha-menthol are taken to be ultrasonically dispersed in 92.8g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Comparative example 3

1) 0.6g of nano zinc oxide, 0.30g of catechin and 0.30g of alpha-menthol are taken to be ultrasonically dispersed in 92.8g of ionic liquid solvent to form cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Comparative example 4

1) Dispersing 0.6g of nano zinc oxide, 0.30g of matrine and 0.30g of catechin in 92.8g of ionic liquid solvent by ultrasonic to form a cellulose solvent. Dissolving 6.00g of bamboo cellulose pulp in a cellulose solvent, stirring at the speed of 500r/min for 6 hours at the temperature of 55 ℃, and performing ultrasonic defoaming at the temperature of 55 ℃ for 20 hours at the power of 200w to obtain a regenerated antibacterial fiber spinning solution;

2) and (3) carrying out dry-jet wet spinning by using the spinning solution to prepare the regenerated antibacterial fiber, wherein the spinning temperature is 55 ℃.

3) Preparing regenerated antibacterial fiber non-woven fabric by using the regenerated antibacterial fiber, carding the fiber into a net by using a roller card after opening, adopting a cross lapping mode, carrying out forward and backward high-pressure spunlace after prewetting, keeping the pressure at 5MPa, drying, shaping, slitting and winding after the spunlace is finished, and obtaining the regenerated antibacterial fiber non-woven fabric.

Test examples

Performance testing of the regenerated bacteriostatic fibers and regenerated bacteriostatic fiber nonwovens described in examples 1-11 and comparative examples 1-4

1. Testing the mechanical properties of the regenerated antibacterial fiber:

the sample is analyzed by a PT-1176 type universal material tensile tester, and the testing speed is 10 mm/min. The breaking strength was obtained by calculating the equation G ═ F/S, 10 times for each sample, and the final results were averaged and shown in table 1.

Wherein G is the breaking strength, MPa; f is breaking strength, N; s is the cross-sectional area, mm²。

The elongation at break of the sample is tested by adopting a PT-1176 type universal material tensile tester, the initial distance between clamps of the tensile tester is 100mm (namely the initial length of the fiber measured each time is 100mm), and the testing speed is 10 mm/min. Elongation at break is calculated by the equation e ═ L_a-L₀)/L₀Calculating; wherein e is elongation at break, L₀Is the initial length of the specimen, L_aLength of the sample at break. Each sample was measured 10 times and the final results averaged as shown in Table 1.

2. Testing the mechanical properties of the regenerated antibacterial fiber non-woven fabric:

a QX-W400 type non-woven fabric tensile force testing machine is used for testing the sample, the testing speed is 100mm/min, the width of the sample is 50 +/-0.5 mm, and the length of the sample meets the requirement of 200mm of nominal clamping distance. Each sample was tested 5 times and the final results averaged as shown in Table 1.

3. And (3) testing the bacteriostatic activity:

GB/T20944.3-2008, evaluation of antibacterial performance of textiles part 3: the samples were tested for bacteriostatic activity as described in the methods of Shake, methods, and the results are shown in Table 1.

TABLE 1

As can be seen from the data in table 1, in terms of mechanical properties, in examples 1 to 5 of the present invention, as the addition amount of the nano zinc oxide increases, the breaking strength of the nonwoven fabric and the breaking strength of the regenerated fiber tend to gradually decrease, and the elongation at break tends to decrease first and then slightly increase, which is mainly because the nano zinc oxide is a metal inorganic particle, and the addition of the inorganic particle to the uniform spinning solution causes an uneven portion to appear inside the fiber, which decreases the strength of the fiber, and therefore, as the addition amount of the nano zinc oxide increases, the breaking strength of the fiber gradually decreases, and further decreases the breaking strength of the nonwoven fabric. But at the same time, the elongation at break of the fiber is increased due to the unique extensibility of the nano material. In examples 6 to 11 of the present invention, it can be found that, when the addition amount of the nano zinc oxide is constant, the mechanical properties of the nonwoven fabric and the fibers themselves are hardly affected by simply changing the addition amount of any one of the three natural extracts, because the three natural extracts all contain structures such as hydroxyl groups, heteroatoms, etc., and these structures can form hydrogen bonds with a large amount of hydrogen bond groups in the cellulose, the introduction of the natural extracts has little effect on the mechanical properties of the nonwoven fabric and the bacteriostatic fibers within a certain addition range. In comparative examples 1 to 4 of the present invention, it can be seen that the strength of the regenerated fiber was slightly increased when any of the four bacteriostatic agents was not added, which is mainly caused by the above-mentioned non-uniform portion.

In the aspect of bacteriostatic performance, in the embodiments 1 to 5 of the present invention, the bacteriostatic rates of staphylococcus aureus, escherichia coli, and candida albicans were all significantly increased with the increase of the addition amount of the nano zinc oxide. In examples 6 to 11 of the present invention, it can be seen that when any one of the three bacteriostatic agents of catechin, matrine, and α -menthol is increased, the bacteriostatic rates of staphylococcus aureus, escherichia coli, and candida albicans also tend to increase, but the bacteriostatic rate of each bacterium slightly increases differently, and when the addition amount of catechin is increased, the bacteriostatic rates of the nonwoven fabric on escherichia coli and staphylococcus aureus increase more significantly; when the addition amount of the matrine is increased, the increase range of the bacteriostasis rate of the non-woven fabric to the candida albicans is large; when the addition amount of the alpha-menthol is increased, the bacteriostatic rates of the non-woven fabric to three bacteria are obviously increased, wherein the bacteriostatic rate of escherichia coli is increased to the maximum extent. Therefore, the four bacteriostatic agents selected by the invention have different degrees of inhibitory action on different bacteria, and the bacteriostatic performance of the regenerated bacteriostatic fiber and the regenerated bacteriostatic fiber non-woven fabric can be obviously improved by blending the four bacteriostatic agents according to a certain proportion.

In conclusion, after the four bacteriostatic agents are added by the method, the bacteriostatic performance of the regenerated cellulose fiber and the nonwoven fabric is effectively improved, and the mechanical property of the material is slightly influenced, so that the method can be widely applied to the field of medical protection.

Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.