CN112941726B

CN112941726B - High-toughness antibacterial mask filter layer and preparation method thereof

Info

Publication number: CN112941726B
Application number: CN202110130119.0A
Authority: CN
Inventors: 李梓维; 黄建华; 刘宇; 谢云斐; 潘安练
Original assignee: Hunan University
Current assignee: Hunan University
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-09-27
Anticipated expiration: 2041-01-29
Also published as: CN112941726A

Abstract

The invention discloses a high-toughness antibacterial mask filter layer and a preparation method thereof. The invention has the advantages that the toughness of the nanofiber thread is enhanced by combining the double-needle rotating electrostatic spinning method with the chemical crosslinking method, the long-acting filtering effect of the nanofiber membrane is realized, the wearing comfort experience is improved, the stuffiness feeling during wearing the mask is relieved, and the filter layer material with the high-toughness sterilization function is finally formed by combining the precious metal antibacterial disinfectant/antibacterial quaternary ammonium salt.

Description

High-toughness antibacterial mask filter layer and preparation method thereof

Technical Field

The invention particularly relates to a high-toughness antibacterial mask filter layer and a preparation method thereof.

Background

Since the 21 st century, the global air quality has been rapidly reduced, people increasingly pay attention to prevention of respiratory diseases, and wearing masks becomes a daily habit of people. However, the common mask has poor toughness and limited use times, and meanwhile, the material scraps of the mask with poor quality, which are generated by folding, bending or stretching and the like, enter the respiratory tract of a human body and cause breathing discomfort. Meanwhile, the environmental conditions are inevitably and seriously influenced by the progress of the human society, particularly, the physical health of people is directly influenced by particles and dust in the air, the using amount of the mask is inevitably and greatly increased, and the mask which has high toughness and long-term use capability and bacteriostatic protection capability is inevitably loved by consumers.

In the prior art, an electrostatic spinning machine is used for electrospinning into a uniform fiber membrane, and a high-voltage electrostatic field generates an instant potential difference between a capillary spinneret and a ground electrode, so that a solution or a melt in the capillary overcomes the surface tension and the viscoelastic force of the solution or the melt, and hemispherical liquid drops are formed at the tail end of the spinneret. Further, the droplet will be drawn into a cone shape, i.e. a Taylor cone. When the electric field strength exceeds a critical value, the surface tension of liquid drops is overcome to form jet flow, the jet flow is further accelerated in an electric field, the jet flow is stretched to form a straight line and is bent after reaching a certain distance, the jet flow advances along an annular shape or a spiral shape and is cooled and solidified along with solvent volatilization or a melt, a fibrous filter screen is self-assembled on a collecting plate, the spinning collecting efficiency and the receiving area are improved by utilizing an electrostatic spinning nanofiber membrane, and the electrostatic spinning nanofiber membrane is applied to multifunctional mask filter layer materials and has the characteristics of strong filtering and adsorbing effects, good air permeability and the like. The prepared electrostatic spinning fibers are usually single micron or nano fibers, the single electrostatic spinning fibers cannot keep higher mechanical toughness, the fibers can be obviously broken in the process of multiple folding and stretching, and the air permeability of a fiber film is deteriorated after the diameter of the fibers is increased, so that the application of the electrostatic spinning nano fiber technology in the mask is directly influenced.

Therefore, how to obtain and impart conductivity to the micro-or nano-fibers with high uniformity and excellent physical and chemical properties has been a key research focus for solving the technical problems of short mask service time and serious material waste in mask applications.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the mask filter layer based on the double-needle rotating electrostatic spinning fibers and the chemical crosslinking modification, so that the mechanical property and the service life of the mask are effectively improved, meanwhile, the harm of germs and particles in the air to human bodies can be prevented, and the health of people is further ensured.

In order to achieve the purpose, the technical scheme of the invention is that the high-toughness antibacterial mask filter layer is prepared from a twist cross-linked electrostatic spinning fiber net structure, and the fibers contain precious metal and quaternary ammonium salt antibacterial components.

Further, the twist cross-linked electrostatic spinning fiber membrane is prepared by combining a double-needle rotating electrostatic spinning method with chemical cross-linking modification, wherein the double-needle rotating electrostatic spinning method is to prepare entangled nano fibers by combining rotation of two needles with electric field regulation and control electric spraying; the chemical crosslinking modification method is based on promoting the crosslinking reaction of polyphenols/enzymes in the entangled nano fibers and polymers at a certain temperature to form a nano fiber network structure.

Further, the preparation method for preparing the twisted cross-linked electrostatic spinning fiber mesh structure by the double-needle rotary electrostatic spinning fiber and the chemical cross-linking modification comprises the following steps:

step 1, freely combining high molecular polymers, dissolving the high molecular polymers in acetic acid, and dissolving polyphenols/enzyme substances in the solution to obtain a precursor solution A;

step 2, preparing silver nitrate into an aqueous solution, and dissolving polyvinylpyrrolidone into dimethylformamide to prepare a reducing solution; slowly adding a silver nitrate aqueous solution into the reducing solution under the water bath condition to form a stable noble metal antibacterial disinfectant B;

step 3, dissolving at least one quaternary ammonium salt in an acetic acid solution, adding glycerol, stirring at room temperature and dissolving to prepare a stable antibacterial precursor solution C;

step 4, taking the precursor solution A in the step 1 as a basic solution, taking a part of the precious metal antibacterial disinfectant B and the antibacterial precursor solution C for fully mixing, and then respectively filling the solutions into two needle tubes of a double-needle rotating nano spinning device for double-needle rotating electrospinning;

and 5, further compacting the nanofiber membrane obtained in the step 4 at a certain temperature to obtain the high-toughness antibacterial mask filter layer material.

Further, the high molecular polymer in the step 1 is fully mixed in an acetic acid solution, wherein the mass percentage of the high molecular polymer in the acetic acid solution is 10% -18%, the solution is stirred at a high speed for 4h-6h at a temperature of 25 ℃ -40 ℃, certain mass of polyphenols and enzymes are added into the solution, the mass percentage of the polyphenols and the enzymes in the acetic acid is 3% -8%, the solution is fully stirred for 4h-8h at a temperature of 20 ℃ -40 ℃, and a uniform and transparent colloidal solution A is formed at first.

Further, the specific process of preparing the silver nitrate into the aqueous solution in the step 2 comprises the following steps: adding silver nitrate into distilled water, wherein the mass ratio of the silver nitrate to the distilled water is 2:5, and stirring the solution for 2-4 h to form a clear solution; then, dispersing polyvinylpyrrolidone with a certain mass in the dimethyl formamide, wherein the mass percentage of the polyvinylpyrrolidone in the solution is 10-15%, stirring the solution for 2-4 h to completely dissolve the polyvinylpyrrolidone, and preparing a reducing solution; slowly dripping silver nitrate solution into the reducing solution in water bath at 75-90 ℃, and stirring the mixed solution for 6-8h to prepare uniform and stable colloidal solution B with the silver nano solution amount of 0.02-0.04 g/mL.

Further, the quaternary ammonium salt in the step 3 is added into the acetic acid solution, the mass fraction ratio of the quaternary ammonium salt is 2% -5%, 2% -4% of glycerin is added, and the solution is stirred for 2h-4h to form uniform and stable antibacterial colloid solution C.

Further, the specific process of step 4 is as follows: uniformly adding a part of the uniform solution B and the solution C formed in the steps 2 and 3 into the solution A, fully stirring for 16-20 h at 25-40 ℃, filling the obtained solution into two needle tubes of a double-needle rotating nano spinning device, rotating the two needle tubes in the same direction, spraying while rotating at a high speed to form double-needle rotating electrospinning, and spinning into the nano fibers arranged in a twist shape under the conditions of the rotating speed of 100r/min-2000r/min, the high pressure of 8KV-12KV, the receiving distance of 20cm-25cm and the injection speed of 0.3ml/h-0.6 ml/h.

Further, the specific process of step 5 is as follows: and (4) compacting the uniform nano-fibers obtained in the step (4) at the temperature of 60-80 ℃ to form a net structure, wherein the pressure range is 1-10 Mpa, so that the stable and uniform high-toughness mask filter layer material with the bacteriostatic function is formed.

Further, the high molecular polymer is one or more of Polyethylene Oxide (POE), ethylene-vinyl acetate copolymer (EVA), terpolymer (EPDM), and polyvinyl alcohol (PVA).

Further, the polyphenols/enzymes are any combination of tannic acid, ferulic acid, caffeic acid, glutaminase and genipin.

The preparation method utilizes nontoxic stretchable high molecular polymer to form a twist-shaped nanofiber membrane by a double-needle rotating electrostatic spinning method, combines polyphenol crosslinking modification, and finally prepares the wearable fiber textile membrane by simple drying. The prepared fibrous membrane has excellent mechanical properties, the high toughness and the wear resistance of the nano spinning twist-shaped nano fibrous membrane are obviously improved, and the fibrous membrane can still keep good integrity even after being folded and stretched for many times. Meanwhile, the precious metal disinfectant/quaternary ammonium salt has a sterilization effect, has an obvious sterilization effect on staphylococcus aureus, escherichia coli, candida albicans and other flora, can effectively prevent germs from entering the mouth cover while effectively improving the toughness effect, and the adopted polyvinyl alcohol nanofiber is a non-toxic high polymer material and has good skin-friendly property and biodegradability.

The double-needle rotating electrostatic spinning technology has the advantages of low requirement on equipment, low production cost, easy realization of the method and the like. The generated nanofiber membrane has the characteristics of good toughness, excellent wear resistance, light weight and the like. Based on the characteristics, the invention greatly improves the winding degree among fibers by the double-needle rotating electrostatic spinning technology, greatly improves the toughness of the spinning fiber membrane on the premise of ensuring the air-permeable filtering efficiency and higher particle blocking stability, and can withstand the folding, stretching and wearing in daily normal use. And the two antibacterial substances are respectively contained in the adjacent spinning distribution, so that the sterilizing effect is greatly improved.

Has the advantages that: according to the invention, the nanofibers with a twisted structure are prepared by adopting the rotation of the double needles and the regulation and control of the electric field through electric spraying, so that the crosslinking reaction of polyphenols/enzymes in the entangled nanofibers and polymers is promoted to form a nanofiber mesh structure at a certain temperature, the toughness of nanofiber threads is enhanced by combining a double-needle rotating electrostatic spinning method and a chemical crosslinking method, the long-acting filtering effect of a nanofiber membrane is realized, the wearing comfort experience is improved, the stuffy feeling during wearing of a mask is relieved, and a filter layer material with a high-toughness sterilization function is finally formed by combining with a noble metal antibacterial disinfectant/antibacterial quaternary ammonium salt.

Drawings

FIG. 1 is a schematic diagram of a double-needle rotating electrostatic nano-spinning double-thread structure;

FIG. 2 is an electron microscope (SEM) image showing the winding phenomenon of nanofibers in electrostatic spinning;

FIG. 3 shows the effect of folding on product performance;

fig. 4 tensile force versus fiber integrity test results.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

Referring to fig. 1 and 2, the high-toughness antibacterial mask filter layer is prepared from a twisted cross-linked electrostatic spinning fiber mesh structure, wherein the fiber contains precious metals and quaternary ammonium salt antibacterial components, 1 is a twisted structure formed by the rotation of double needles combined with the regulation and control of an electric field, and 2 is an interactive structure formed under the chemical cross-linking reaction at a certain temperature.

The twist crosslinked electrostatic spinning fiber membrane is prepared by combining a double-needle rotating electrostatic spinning method with chemical crosslinking modification, wherein the double-needle rotating electrostatic spinning method is to prepare entangled precursor nanofibers by combining rotation of two needles with electric field regulation and control electric spraying; the chemical crosslinking modification method is based on promoting the crosslinking reaction of polyphenols/enzymes in entangled precursor nanofibers and polymers at a certain temperature to form a nanofiber network structure.

The preparation method for preparing the twisted cross-linked electrostatic spinning fiber mesh structure by the double-needle rotating electrostatic spinning fiber and the chemical cross-linking modification comprises the following steps:

step 1, freely combining high molecular polymers, dissolving the high molecular polymers in acetic acid, and dissolving polyphenols/enzyme substances in the solution to be used as a precursor solution A;

and 5, further compacting the nano fibers obtained in the step 4 at a certain temperature to obtain the high-toughness antibacterial mask filter layer material.

The method comprises the following steps of 1, fully mixing a high molecular polymer in an acetic acid solution, wherein the mass percent of the high molecular polymer in the acetic acid solution is 10% -18%, stirring the solution at a high speed for 4-6 h at a temperature of 25-40 ℃, adding polyphenols and enzymes with certain mass into the solution, wherein the mass percent of the polyphenols and the enzymes in the acetic acid is 3% -8%, fully stirring the solution for 4-8h at a temperature of 20-40 ℃, and firstly forming a uniform and transparent colloidal solution A.

The specific process of preparing the silver nitrate into the aqueous solution in the step 2 comprises the following steps: adding silver nitrate into distilled water, wherein the mass ratio of the silver nitrate to the distilled water is 2:5, and stirring the solution for 2-4 h to form a clear solution; then, dispersing polyvinylpyrrolidone with a certain mass in the dimethyl formamide, wherein the mass percentage of the polyvinylpyrrolidone in the solution is 10-15%, stirring the solution for 2-4 h to completely dissolve the polyvinylpyrrolidone, and preparing a reducing solution; slowly dripping silver nitrate solution into the reducing solution in water bath at the temperature of 75-90 ℃, and stirring the mixed solution for 6-8h to prepare uniform and stable colloidal solution B with the silver nano solution amount of 0.02-0.04 g/mL.

Adding the quaternary ammonium salt in the step 3 into the acetic acid solution, wherein the mass fraction ratio of the quaternary ammonium salt is 2% -5%, adding 2% -4% of glycerol, and stirring the solution for 2-4 h to form a uniform and stable antibacterial colloidal solution C.

The specific process of the step 4 is as follows: uniformly adding a part of the uniform solution B and the solution C formed in the steps 2 and 3 into the solution A, fully stirring for 16-20 h at 25-40 ℃, putting the obtained solution into two needle tubes of a double-needle rotating nano spinning device for double-needle rotating electrospinning, wherein the rotating speed of the double needles is 100-2000 r/min, 8-12 KV high voltage is used, the receiving distance is 20-25 cm, and the injection speed is 0.3-0.6 ml/h.

The specific process of the step 5 is as follows: and (4) compacting the uniform nanofiber membrane obtained in the step (4) at the temperature of 60-80 ℃, wherein the pressure range is 1-10 Mpa, so that the stable and uniform high-toughness mask filter layer material with the antibacterial function is formed.

The high molecular polymer is one or more of Polyethylene Oxide (POE), ethylene-vinyl acetate copolymer (EVA), terpolymer (EPDM), and polyvinyl alcohol (PVA).

The polyphenols/enzymes are any combination of tannic acid, ferulic acid, caffeic acid, glutaminase, and genipin.

Example one

(1) 10ml of acetic acid is taken by a measuring cylinder and placed in a 25ml beaker, 1g of high molecular polymer is weighed and added into the solution, the solution is stirred at high speed for 4 hours at 30 ℃ to form a uniform and transparent colloidal solution, 0.03g of polyphenol/enzyme and other substances are weighed and dissolved in the solution, and the solution is stirred at 30 ℃ for 6 hours to be used as a precursor solution A.

(2) Measuring 1mL of distilled water solution to prepare 0.4g/mL silver nitrate solution, and stirring the solution for 2 hours to form clear solution; then dispersing 1g of polyvinylpyrrolidone in dimethylformamide, stirring the solution for 2-4 h to completely dissolve the polyvinylpyrrolidone to prepare a reducing solution; slowly dropping a silver nitrate solution into the reducing solution in a water bath at the temperature of 80 ℃, and stirring the mixed solution for 6-8h to form a noble metal antibacterial precursor solution which is marked as solution B.

(3) 10ml of 2% acetic acid solution and 1ml of glycerol were measured, transferred to a 25ml beaker, 0.8g of quaternary ammonium salt was weighed into the acetic acid solution, and the solution was stirred for 2h to form a quaternary ammonium salt precursor solution, labeled as solution C.

(4) Respectively adding 1.5ml of the precursor colloidal solution B and the solution C into the solution A, fully stirring for 4h at 40 ℃, then loading into two needle cylinders of a double-needle rotating electrostatic spinning device for double-needle rotating electrospinning, wherein the double-needle rotating speed is 500r/min, 8KV high pressure and 25cm receiving distance are respectively used, the injection speed is 0.5ml/h, a uniform nanofiber high-toughness film is formed, the nanofiber high-toughness film is transferred into a vacuum oven, and is dried for 10h at 80 ℃, and a stable and uniform high-toughness antibacterial layer is formed by removing water.

(5) And compacting the obtained uniform nanofiber membrane at 70 ℃ under the pressure of 5Mpa to form the stable and high-toughness nanofiber membrane with the antibacterial function.

Example two

(1) 10ml of acetic acid is taken by a measuring cylinder and placed in a 25ml beaker, 1.2g of high molecular polymer is weighed and added into the solution, the solution is stirred at high speed for 4 hours at 30 ℃ to form a uniform and transparent colloidal solution, 0.05g of polyphenol/enzyme and other substances are weighed and dissolved in the solution, and the solution is stirred at 30 ℃ for 6 hours to be used as a precursor solution A.

(2) Measuring 1mL of distilled water solution to prepare 0.4g/mL silver nitrate solution, and stirring the solution for 2 hours to form clear solution; then dispersing 1g of polyvinylpyrrolidone in dimethylformamide, stirring the solution for 2-4 h to completely dissolve the polyvinylpyrrolidone to prepare a reducing solution; slowly dropping silver nitrate solution into the reducing solution in water bath at 80 ℃, and stirring the mixed solution for 6-8h to form a noble metal antibacterial precursor solution marked as solution B.

(5) And (3) compacting the obtained uniform nanofiber membrane at 70 ℃, wherein the pressure is 5Mpa, so that the stable high-toughness nanofiber membrane with the antibacterial function is formed.

EXAMPLE III

(1) 10ml of acetic acid is taken by a measuring cylinder and placed in a 25ml beaker, 1.4g of high molecular polymer is weighed and added into the solution, the solution is stirred at high speed for 4 hours at 30 ℃ to form a uniform and transparent colloidal solution, 0.07g of polyphenol/enzyme and other substances are weighed and dissolved in the solution, and the solution is stirred at 30 ℃ for 6 hours to be used as a precursor solution A.

(3) 10ml of a 2% acetic acid solution and 1ml of glycerol were measured, transferred to a 25ml beaker, 0.8g of quaternary ammonium salt was weighed into the acetic acid solution, and the solution was stirred for 2 hours to form a quaternary ammonium salt precursor solution, labeled as solution C.

The products of the above examples were subjected to performance tests, and the specific test results are shown in table 1, fig. 2, fig. 3, and fig. 4:

TABLE 1 bacteriostatic property test table for products

As can be seen from the test results in Table 1, the product obtained by the technical scheme of the application not only can keep better breathing resistance, but also can effectively ensure excellent permeation efficiency, can stably inhibit staphylococcus aureus, and basically realizes excellent filtering effect, ventilation effect and better antibacterial effect in the gist of the invention.

As shown in fig. 3, compared with the conventional medical mask, the filtering effect of the filtering layer product of the present invention is not greatly changed even after being folded many times and is better than that of the conventional medical mask.

As shown in fig. 4, compared with the filter layer fiber integrity of the common medical mask under a certain tensile force, the filter layer product of the present invention can maintain the fiber integrity and the toughness of the filter layer product is superior to that of the common medical mask even under a large tensile force.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.

Claims

1. The high-toughness antibacterial mask filter layer is characterized by being prepared from a twisted cross-linked electrostatic spinning fiber net structure, wherein the fiber contains precious metal and quaternary ammonium salt antibacterial components, the twisted cross-linked electrostatic spinning fiber film is prepared by combining a double-needle rotating electrostatic spinning method with chemical cross-linking modification, and the double-needle rotating electrostatic spinning method is to prepare entangled nano-fibers by combining rotation of two needles with electric field regulation and control electric spraying; the chemical crosslinking modification method is based on the fact that polyphenols/enzymes in the entangled nano fibers are promoted to react with polymers in a crosslinking mode at a certain temperature to form a nano fiber net structure; the rotation of the two needles is combined with electric field regulation and control to prepare entangled nano fibers by electric spraying: the two needle tubes rotate in the same direction, and spray while rotating to form double-needle rotating electrospinning, wherein the rotating speed is 100r/min-2000r/min, the receiving distance is 20cm-25cm under the high voltage of 8KV-12KV, and the injection speed is 0.3ml/h-0.6 ml/h.

2. A preparation method of an antibacterial mask filter layer is characterized in that a twisted cross-linked electrostatic spinning fiber mesh structure is prepared by adopting double-needle rotary electrostatic spinning fibers and chemical cross-linking modification, and comprises the following steps:

step 1, freely combining high molecular polymers, dissolving the high molecular polymers in acetic acid, and dissolving polyphenols/enzymes in a solution to obtain a precursor solution A;

step 2, preparing silver nitrate into an aqueous solution, and dissolving polyvinylpyrrolidone into dimethylformamide to prepare a reducing solution; slowly adding a silver nitrate aqueous solution into the reducing solution under the water bath condition to form a stable precious metal antibacterial disinfectant B;

step 4, taking the precursor solution A in the step 1 as a basic solution, taking a part of the precious metal antibacterial disinfectant B and the antibacterial precursor solution C for full mixing, then respectively placing the solutions into two needle tubes of a double-needle rotary nano spinning device for double-needle rotary electrospinning, wherein the two needle tubes rotate in the same direction and spray while rotating to form the double-needle rotary electrospinning, the rotating speed is 100r/min-2000r/min, the conditions of 8KV-12KV high pressure, 20cm-25cm receiving distance and 0.3ml/h-0.6ml/h are used;

3. The method for preparing the filtering layer of the antibacterial mask according to claim 2, wherein the high molecular polymer is fully mixed in the acetic acid solution in step 1, wherein the mass percentage of the high molecular polymer in the acetic acid solution is 10% -18%, the solution is stirred at a high speed for 4h-6h at 25 ℃ -40 ℃, a certain mass of polyphenols/enzymes are added into the solution, wherein the mass percentage of the polyphenols/enzymes in the acetic acid is 3% -8%, and the solution is fully stirred at 20 ℃ -40 ℃ for 4h-8h, so that a uniform and transparent colloidal solution is formed first.

4. The method for preparing the filter layer of the antibacterial mask according to claim 3, wherein the specific process for preparing the noble metal antibacterial disinfectant in the step 2 is as follows: adding silver nitrate into distilled water, wherein the mass ratio of the silver nitrate to the distilled water is 2:5, and stirring the solution for 2-4 h to form a clear solution; then, dispersing polyvinylpyrrolidone with a certain mass in the dimethyl formamide, wherein the mass percentage of the polyvinylpyrrolidone in the solution is 10-15%, stirring the solution for 2-4 h to completely dissolve the polyvinylpyrrolidone, and preparing a reducing solution; slowly dripping silver nitrate solution into the reducing solution in water bath at the temperature of 75-90 ℃, and stirring the mixed solution for 6-8h to prepare uniform and stable colloidal solution with the silver nano solution amount of 0.02-0.04 g/mL.

5. The preparation method of the antibacterial mask filter layer according to claim 4, wherein the quaternary ammonium salt in the antibacterial precursor solution in the step 3 is added into an acetic acid solution in a mass fraction ratio of 2% -4%, 2% -4% of glycerin is added, and the solution is stirred for 2-4 h to form a uniform and stable antibacterial colloidal solution.

6. The method for preparing the filter layer of the antibacterial mask according to claim 5, wherein the specific process of the step 4 is as follows: and (3) taking a part of the uniform solution formed in the step (2) and the step (3), adding the uniform solution into the precursor solution, fully stirring for 16-20 h at the temperature of 25-40 ℃, and filling the obtained solution into two needle tubes of a double-needle rotating nano spinning device.

7. The method for preparing the filter layer of the antibacterial mask according to claim 6, wherein the specific process of the step 5 is as follows: and (4) compacting the uniform nanofiber mesh structure obtained in the step (4) at the temperature of 60-80 ℃, wherein the pressure range is 1-10 Mpa, so that the stable and uniform high-toughness mask filter layer material with the bacteriostatic function is formed.

8. The method for preparing the filter layer of the antibacterial mask according to claim 7, wherein the high molecular polymer is one or more of polyethylene oxide, ethylene-vinyl acetate copolymer, terpolymer and polyvinyl alcohol.

9. The method of claim 8 wherein the polyphenols/enzymes are any combination of tannic acid, ferulic acid, caffeic acid, glutaminase, and genipin.