Method for preparing an antibacterial and antiviral nonwoven material for improving the breathability of protective masks

Abstract

This invention provides a method for preparing an antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks. The method involves: mixing an electrospinnable polymer and polyvinylpyrrolidone to obtain electrospinning solution A; dissolving A in a solvent; adding potassium iodide to obtain electrospinning solution B; and then combining electrospinning solution B with a nonwoven fabric material for masks to form an electrospinned nanofilm on the surface of the nonwoven fabric material closest to the outside air, resulting in an electrospinned membrane nonwoven material. This material is then soaked in a hydrogen peroxide solution and dried at room temperature in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material. The highly breathable antibacterial and antiviral nonwoven fabric material prepared by this invention not only ensures the basic physical protection of protective masks but also provides active germ-killing effects while giving the mask high breathability, thus ensuring smoother breathing through the mouth and nose.

Description

Technical Field

[0001] This invention belongs to the field of textile processing technology, specifically relating to a method for preparing an antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks. Background Technology

[0002] Currently, medical masks are mainly made of multi-layered nonwoven fabric composites, consisting of three layers: inner, middle, and outer. The outer layer is a waterproof layer, generally composed of spunbond or thermoplastic nonwoven fabric with a relatively large pore size, capable of intercepting larger particles. The middle layer is a filter layer, composed of meltblown nonwoven fabric with strong filtration capabilities, capable of filtering even smaller particles; it is the core component of medical masks. The inner layer is a moisture-absorbing layer made of ordinary spunbond, needle-punched, or spunlace nonwoven fabric, ensuring moisture absorption while also being skin-friendly and comfortable. With the maturity of production processes and the increasing demand for health and safety, researchers are paying more and more attention to the antibacterial and filtration / disinfection properties of nonwoven materials used in medical masks. Ordinary thermoplastic polymer-based meltblown and spunbond fabrics are no longer sufficient to meet the functional requirements of protective materials. Currently, various protective materials with active antibacterial or antiviral properties have emerged on the market. For example, Lai Yuchao et al. deposited polydopamine (PDA) and polyethyleneimine (PEI) onto PP meltblown material (P-PP) using a co-deposition technique, and then loaded silver / reduced graphene oxide (Ag / rGO) onto P-PP using a microwave-assisted method to prepare Ag / rGO-P-PP meltblown nonwoven composite material. Their antibacterial properties were investigated using Escherichia coli and Staphylococcus aureus as research subjects. The results showed that Ag / rGO-PP exhibited an inhibition rate of over 99.99% against both bacteria. In addition, medical protective masks are generally provided for use by professional medical personnel. According to the national standard GB19083-2003 "Technical Requirements for Medical Protective Masks", when the airflow is (85±2) L / min, the filtration efficiency of medical protective masks for sodium chloride aerosols with a diameter of (0.24±0.06) μm should not be less than 95%. Therefore, the pore size of the middle filter layer of medical protective masks must meet certain requirements to show a good filtration effect against tiny harmful pathogens. However, the small pore size of the mask material will inevitably cause breathing difficulties, and in severe cases, may lead to hypoxic shock. Therefore, protective materials, especially those used in protective masks, should have the characteristics of actively killing pathogenic microorganisms and high breathability. However, there are few reports on protective products that improve breathability in the market. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for preparing an antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks, in order to address the shortcomings of the prior art. The high-breathability antibacterial and antiviral nonwoven fabric material prepared by this method can ensure the basic physical protection function of the protective mask, give it the effect of actively killing germs, and have high-efficiency breathability to ensure comfortable breathing.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for preparing an antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks, the method being as follows: S1. Electrospinning solution A is obtained by mixing electrospinnable polymer and polyvinylpyrrolidone. S2. Dissolve the electrospinning solution A obtained in S1 in a solvent, and then add potassium iodide to obtain electrospinning solution B. In this step, potassium iodide is added to electrospinning solution A to prepare electrospinning solution B. On the one hand, this increases the conductivity of electrospinning solution B to facilitate spinning; on the other hand, potassium iodide can exist inside the fiber matrix and can promote the generation of oxygen from hydrogen peroxide after it comes into contact with hydrogen peroxide. Oxygen acts as a pore-forming agent, which can create more pores inside the fiber material, thereby improving the air permeability of the electrospinned membrane. S3. The electrospinning solution B obtained in S2 is combined with the non-woven fabric material for masks by electrospinning. An electrospinning nanofilm is formed on the surface of the non-woven fabric material for masks that is close to the outside air, and an electrospinning membrane non-woven material is obtained. The nonwoven fabric material for masks in this invention can be meltblown, spunlace, hot-rolled, or other nonwoven materials; meltblown polypropylene, polyvinyl chloride, polyethylene, polyester, nylon, or other short-fiber nonwoven materials; or viscose, modal, or other nonwoven materials prepared by wet spinning. S4. The electrospun membrane nonwoven material obtained in S3 is soaked in hydrogen peroxide solution and then dried at room temperature and in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material.

[0005] Preferably, the electrospinnable polymer in S1 is one or more of polyacrylonitrile, polylactic acid, polylactic acid hydroxyethyl ester, and polyvinyl alcohol.

[0006] Preferably, the mass ratio of the electrospinnable polymer and polyvinylpyrrolidone in S1 is 1:(2-5).

[0007] Preferably, the solvent in S2 is one or more of acetone, N,N-dimethylbisacrylamide, dimethyl sulfoxide, and water.

[0008] Preferably, the ratio of the amount of electrospinning solution A, solvent and potassium iodide in S2 is (10-50) g: (100-500) mL: (1-10) g.

[0009] Preferably, the parameters of the electrospinning method in S3 are: voltage of 10kV to 50kV, receiving distance of 10cm to 50cm, and time of 2min to 3min.

[0010] Preferably, the ratio of the amount of electrospun nonwoven material and hydrogen peroxide aqueous solution in S4 is 1g:(10-100)mL; the hydrogen peroxide aqueous solution is a hydrogen peroxide aqueous solution with a mass fraction of 1% to 10%.

[0011] Preferably, the soaking time in S4 is 6 min to 60 min.

[0012] Preferably, the air permeability of the highly breathable antibacterial and antiviral nonwoven fabric material described in S4 is 25 Pa / cm². 2 ~28Pa / cm 2 The highly breathable antibacterial and antiviral nonwoven fabric material inhibits the activity of Staphylococcus aureus and Escherichia coli.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The highly breathable antibacterial and antiviral nonwoven fabric material prepared by this invention has a structure with mesoporous channels that allow air to pass freely, and at the same time has antibacterial and disinfection effects. It can not only block solid particles and pathogenic microorganisms, but also actively kill pathogenic microorganisms, and has better breathability.

[0014] 2. The process of this invention is novel, the reaction conditions are controllable, and the energy consumption is low. More importantly, no toxic solvents are used in the process of this invention, so it has no toxic effect on the environment or human body. This invention can not only ensure the basic physical protection of the protective mask, but also enable it to actively kill germs. At the same time, it can also give the mask high-efficiency breathability, thereby ensuring smoother breathing through the mouth and nose.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a scanning electron microscope image of the electrospun nanofibers on the surface of the highly breathable antibacterial and antiviral nonwoven fabric material prepared in Example 1 of the present invention.

[0017] Figure 2 This is a test diagram of the inhibition zone of Escherichia coli (a) and Staphylococcus aureus (b) on the highly breathable antibacterial and antiviral nonwoven material prepared in Example 1 of the present invention. Detailed Implementation

[0018] Example 1 The method for preparing the antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks in this embodiment is as follows: S1. Electrospinning solution A is obtained by mixing electrospinnable polymer and polyvinylpyrrolidone (PVP). The electrospinnable polymer is polyacrylonitrile (PAN). The polyacrylonitrile mentioned above is commercially available and has a relative molecular weight of 85,000. The polyvinylpyrrolidone mentioned is commercially available and has a relative molecular mass of 100,000. The mass ratio of the electrospinnable polymer to polyvinylpyrrolidone is 1:4; S2. Dissolve the electrospinning solution A obtained in S1 in a solvent, and then add potassium iodide to obtain electrospinning solution B. The solvent is a mixture of N,N-dimethylbisacrylamide (DMF) and water in a volume ratio of 10:1; The ratio of the electrospinning solution A, solvent and potassium iodide is 20g:220mL:1g; In this step, potassium iodide is added to electrospinning solution A to prepare electrospinning solution B. On the one hand, this increases the conductivity of electrospinning solution B to facilitate spinning; on the other hand, potassium iodide can exist inside the fiber matrix and can promote the generation of oxygen from hydrogen peroxide after it comes into contact with hydrogen peroxide. Oxygen acts as a pore-forming agent, which can create more pores inside the fiber material, thereby improving the air permeability of the electrospinned membrane. S3. First, attach non-woven fabric material for masks to the receiving plate of the electrospinning machine in advance. Then, use electrospinning to combine the electrospinning solution B obtained in S2 with the non-woven fabric material for masks. The voltage of the electrospinning machine is 20kV and the receiving distance is 15cm. Run the electrospinning machine for 2 minutes to obtain electrospinned non-woven film material, realize the combination of KI and non-woven fabric material, and form an electrospinned nanofilm on the surface of the non-woven fabric material for masks close to the outside air to obtain electrospinned non-woven film material. In this embodiment, the nonwoven fabric material used for the mask is the meltblown nonwoven fabric of the middle layer of a disposable medical surgical mask; S4. Immerse the electrospun nonwoven film material obtained in S3 in a 3% hydrogen peroxide aqueous solution for 6 minutes. When no bubbles are generated on the surface of the electrospun nonwoven film material, take it out and air dry it at room temperature in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material.

[0019] In this embodiment, after the formation of elemental I2, care should be taken to avoid light and store it at room temperature to prevent elemental I2 from sublimating upon exposure to light. Electrospun nanofilms can complex elemental I2 generated from the reaction of hydrogen peroxide and potassium iodide, thereby increasing the I2 content and enabling sustained drug release, thus improving the killing efficacy against pathogenic microorganisms. In this embodiment, the non-woven fabric material for masks is first compounded with potassium iodide (KI) molecules; then hydrogen peroxide is used to treat the non-woven material to promote the formation of breathable pores on the surface of the non-woven material.

[0020] The ratio of the electrospun nonwoven material to the hydrogen peroxide aqueous solution is 1g:20mL; The highly breathable antibacterial and antiviral nonwoven fabric material has a breathability of 25 Pa / cm². 2 The highly breathable antibacterial and antiviral nonwoven fabric material inhibits the activity of Staphylococcus aureus and Escherichia coli.

[0021] Figure 1 The image shows a scanning electron microscope image of the electrospun nanofibers on the surface of the highly breathable antibacterial and antiviral nonwoven fabric material prepared in this embodiment. The image shows that after potassium iodide was added and treated with hydrogen peroxide, the surface of the nanofibers has nanoparticles composed of elemental iodine. Furthermore, mesopores of different sizes can be observed on the surface of the nanoparticles when magnified. Thus, the fiber aggregate composite material formed by these fibers has good breathability.

[0022] Tests showed that the air permeability of the composite material of the electrospun membrane and meltblown nonwoven fabric without hydrogen peroxide treatment (i.e., the electrospun membrane nonwoven material prepared in step S3) was approximately 35 Pa / cm². 2 In this embodiment, the air permeability of the highly breathable antibacterial and antiviral nonwoven fabric material finally prepared after hydrogen peroxide treatment in step S4 can be reduced to 25 Pa / cm. 2 Furthermore, the surface of the fiber treated with hydrogen peroxide contains a large number of I2 molecules, which have a good bactericidal effect. Through the inhibition zone test, bacteria were inhibited at a constant temperature of 37°C. o After culturing under C conditions for 24 h, it was found that the highly breathable antibacterial and antiviral nonwoven material prepared in this embodiment (i.e., a composite material of electrospun film and meltblown nonwoven fabric) exhibited an inhibition zone of approximately 2 mm against Staphylococcus aureus (S. aureus) (a) and Escherichia coli (E. coli) (a). Figure 2 As shown, it has good antibacterial properties.

[0023] Example 2 The method for preparing the antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks in this embodiment is as follows: S1. Electrospinning solution A is obtained by mixing electrospinnable polymer and polyvinylpyrrolidone (PVP). The electrospinnable polymer is polylactic acid (PLA). The polyacrylonitrile mentioned above is commercially available and has a relative molecular weight of 85,000. The polylactic acid (PLA) mentioned is commercially available and has a relative molecular weight of 65,000. The polyvinylpyrrolidone mentioned is commercially available and has a relative molecular mass of 100,000. The mass ratio of the electrospinnable polymer to polyvinylpyrrolidone is 1:2; S2. Dissolve the electrospinning solution A obtained in S1 in a solvent, and then add potassium iodide to obtain electrospinning solution B. The solvent is dimethyl sulfoxide; The ratio of electrospinnable polymer, solvent and potassium iodide in the electrospinning solution A is 10g:100mL:10g; S3. First, attach non-woven fabric material for masks to the receiving plate of the electrospinning machine in advance. Then, use electrospinning to combine the electrospinning solution B obtained in S2 with the non-woven fabric material for masks. The voltage of the electrospinning machine is 10kV and the receiving distance is 10cm. Run the electrospinning machine for 3 minutes to obtain electrospinned non-woven film material, realize the combination of KI and non-woven fabric material, and form an electrospinned nanofilm on the surface of the non-woven fabric material for masks close to the outside air to obtain electrospinned non-woven film material. In this embodiment, the nonwoven fabric material used for the mask is the meltblown nonwoven fabric of the middle layer of a disposable medical surgical mask; S4. Immerse the electrospun nonwoven membrane material obtained in S3 in a 1% hydrogen peroxide aqueous solution for 60 minutes. When no bubbles are generated on the surface of the electrospun nonwoven membrane material, take it out and air dry it at room temperature in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material.

[0024] The ratio of the electrospun nonwoven material to the hydrogen peroxide aqueous solution is 1g:10mL. The highly breathable antibacterial and antiviral nonwoven fabric material has a breathability of 28 Pa / cm². 2 The highly breathable antibacterial and antiviral nonwoven fabric material inhibits the activity of Staphylococcus aureus and Escherichia coli, with inhibition zones of approximately 1 mm.

[0025] Example 3 The method for preparing the antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks in this embodiment is as follows: S1. Electrospinning solution A is obtained by mixing electrospinnable polymer and polyvinylpyrrolidone (PVP). The electrospinnable polymer is poly(hydroxyethyl lactate) (PLGA). The polylactic acid hydroxyethyl ester (PLGA) is commercially available and has a relative molecular weight of 75,000. The polyvinylpyrrolidone mentioned is commercially available and has a relative molecular mass of 100,000. The mass ratio of the electrospinnable polymer to polyvinylpyrrolidone is 1:5; S2. Dissolve the electrospinning solution A obtained in S1 in a solvent, and then add potassium iodide to obtain electrospinning solution B. The solvent is acetone; The ratio of electrospinnable polymer, solvent, and potassium iodide in the electrospinning solution A is 50g: 500mL: 5g; S3. First, attach non-woven fabric material for masks to the receiving plate of the electrospinning machine in advance. Then, use electrospinning to combine the electrospinning solution B obtained in S2 with the non-woven fabric material for masks. The voltage of the electrospinning machine is 50kV and the receiving distance is 50cm. Run the electrospinning machine for 2.5min to obtain electrospinned membrane non-woven material, realize the combination of KI and non-woven fabric material, and form an electrospinned nanofilm on the surface of the non-woven fabric material for masks close to the outside air to obtain electrospinned membrane non-woven material. In this embodiment, the nonwoven fabric material used for the mask is the meltblown nonwoven fabric of the middle layer of a disposable medical surgical mask; S4. Immerse the electrospun nonwoven membrane material obtained in S3 in a 10% hydrogen peroxide aqueous solution for 10 minutes. When no bubbles are generated on the surface of the electrospun nonwoven membrane material, take it out and air dry it at room temperature in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material.

[0026] The ratio of the electrospun nonwoven material to the hydrogen peroxide aqueous solution is 1g:50mL. The highly breathable antibacterial and antiviral nonwoven fabric material has a breathability of 26 Pa / cm². 2 The highly breathable antibacterial and antiviral nonwoven fabric material inhibits the activity of Staphylococcus aureus and Escherichia coli, with inhibition zones of approximately 1 mm.

[0027] Example 4 The method for preparing the antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks in this embodiment is as follows: S1. Electrospinning solution A is obtained by mixing electrospinnable polymer and polyvinylpyrrolidone (PVP). The electrospinnable polymer is polyvinyl alcohol (PVA). The polyvinyl alcohol (PVA) mentioned is commercially available and has a relative molecular weight of 100,000; The polyvinylpyrrolidone mentioned is commercially available and has a relative molecular mass of 100,000. The mass ratio of the electrospinnable polymer to polyvinylpyrrolidone is 1:3; S2. Dissolve the electrospinning solution A obtained in S1 in a solvent, and then add potassium iodide to obtain electrospinning solution B. The solvent is water; The electrospinning solution A contains an electrospinning polymer, a solvent, and potassium iodide in a ratio of 40g:300mL:2g. S3. First, attach non-woven fabric material for masks to the receiving plate of the electrospinning machine in advance. Then, use electrospinning to combine the electrospinning solution B obtained in S2 with the non-woven fabric material for masks. The voltage of the electrospinning machine is 20kV and the receiving distance is 20cm. Run the electrospinning machine for 2 minutes to obtain electrospinned non-woven film material, realize the combination of KI and non-woven fabric material, and form an electrospinned nanofilm on the surface of the non-woven fabric material for masks close to the outside air to obtain electrospinned non-woven film material. In this embodiment, the nonwoven fabric material used for the mask is the meltblown nonwoven fabric of the middle layer of a disposable medical surgical mask; S4. Immerse the electrospun nonwoven membrane material obtained in S3 in a 5% hydrogen peroxide aqueous solution for 20 minutes. When no bubbles are generated on the surface of the electrospun nonwoven membrane material, take it out and air dry it at room temperature in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material.

[0028] The ratio of the electrospun nonwoven material to the hydrogen peroxide aqueous solution is 1g:30mL. The highly breathable antibacterial and antiviral nonwoven fabric material has a breathability of 26 Pa / cm². 2 The highly breathable antibacterial and antiviral nonwoven fabric material inhibits the activity of Staphylococcus aureus and Escherichia coli, with inhibition zones of approximately 2 mm.

[0029] Example 5 The method for preparing the antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks in this embodiment is as follows: S1. Electrospinning solution A is obtained by mixing electrospinnable polymer and polyvinylpyrrolidone (PVP). The electrospinnable polymer is a mixture of polyacrylonitrile (PAN) and polylactic acid (PLA) in a mass ratio of 1:1; The polyacrylonitrile mentioned above is commercially available and has a relative molecular weight of 85,000. The polylactic acid (PLA) mentioned is commercially available and has a relative molecular weight of 65,000. The polyvinylpyrrolidone mentioned is commercially available and has a relative molecular mass of 100,000. The mass ratio of the electrospinnable polymer to polyvinylpyrrolidone is 1:4; S2. Dissolve the electrospinning solution A obtained in S1 in a solvent, and then add potassium iodide to obtain electrospinning solution B. The solvent is a mixture of acetone and dimethyl sulfoxide in a volume ratio of 3:2; The ratio of electrospinning polymer, solvent and potassium iodide in the electrospinning solution A is 35g:250mL:8g; S3. First, attach non-woven fabric material for masks to the receiving plate of the electrospinning machine in advance. Then, use electrospinning to combine the electrospinning solution B obtained in S2 with the non-woven fabric material for masks. The voltage of the electrospinning machine is 45kV and the receiving distance is 35cm. Run the electrospinning machine for 2 minutes to obtain electrospinned non-woven film material, realize the combination of KI and non-woven fabric material, and form an electrospinned nanofilm on the surface of the non-woven fabric material for masks close to the outside air to obtain electrospinned non-woven film material. In this embodiment, the nonwoven fabric material used for the mask is the meltblown nonwoven fabric of the middle layer of a disposable medical surgical mask; S4. Immerse the electrospun nonwoven membrane material obtained in S3 in a 6% hydrogen peroxide aqueous solution for 50 minutes. When no bubbles are generated on the surface of the electrospun nonwoven membrane material, take it out and air dry it at room temperature in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material.

[0030] The ratio of the electrospun nonwoven material to the hydrogen peroxide aqueous solution is 1g:50mL. The highly breathable antibacterial and antiviral nonwoven fabric material has a breathability of 27 Pa / cm². 2 The highly breathable antibacterial and antiviral nonwoven fabric material inhibits the activity of Staphylococcus aureus and Escherichia coli, with inhibition zones of approximately 1 mm.

[0031] Example 6 The method for preparing the antibacterial and antiviral nonwoven fabric material that improves the breathability of protective masks in this embodiment is as follows: S1. Electrospinning solution A is obtained by mixing electrospinnable polymer and polyvinylpyrrolidone (PVP). In this embodiment, the electrospinnable polymer is a mixture of poly(hydroxyethyl lactate) (PLGA) and polyvinyl alcohol (PVA) in a mass ratio of 1:2. The polylactic acid hydroxyethyl ester (PLGA) is commercially available and has a relative molecular weight of 75,000. The polyvinyl alcohol (PVA) mentioned is commercially available and has a relative molecular weight of 100,000; The polyvinylpyrrolidone mentioned is commercially available and has a relative molecular mass of 100,000. The mass ratio of the electrospinnable polymer to polyvinylpyrrolidone is 1:3; The electrospinnable polymer may also be one or more of polyacrylonitrile (PAN), polylactic acid (PLA), polyhydroxyethyl lactate (PLGA), and polyvinyl alcohol (PVA). S2. Dissolve the electrospinning solution A obtained in S1 in a solvent, and then add potassium iodide to obtain electrospinning solution B. The solvent described in this embodiment is a mixture of N,N-dimethylbisacrylamide (DMF) and water in a volume ratio of 3:1; The solvent may also be one or more of acetone, N,N-dimethylbisacrylamide (DMF), dimethyl sulfoxide, and water; The ratio of electrospinning polymer, solvent and potassium iodide in the electrospinning solution A is 25g:400mL:4g; S3. First, attach non-woven fabric material for masks to the receiving plate of the electrospinning machine in advance. Then, use electrospinning to combine the electrospinning solution B obtained in S2 with the non-woven fabric material for masks. The voltage of the electrospinning machine is 45kV and the receiving distance is 45cm. Run the electrospinning machine for 3 minutes to obtain electrospinned non-woven film material, realize the combination of KI and non-woven fabric material, and form an electrospinned nanofilm on the surface of the non-woven fabric material for masks close to the outside air to obtain electrospinned non-woven film material. In this embodiment, the nonwoven fabric material used for the mask is the meltblown nonwoven fabric of the middle layer of a disposable medical surgical mask; In this embodiment, the nonwoven fabric material for masks can also be meltblown, spunlace, hot-rolled, or other nonwoven materials; meltblown polypropylene, polyvinyl chloride, polyethylene, polyester, nylon, or other short-fiber nonwoven materials; or viscose, modal, or other nonwoven materials prepared by wet spinning. S4. Immerse the electrospun nonwoven membrane material obtained in S3 in a 5% hydrogen peroxide aqueous solution for 20 minutes. When no bubbles are generated on the surface of the electrospun nonwoven membrane material, take it out and air dry it at room temperature in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material.

[0032] The ratio of the electrospun nonwoven material to the hydrogen peroxide aqueous solution is 1g:80mL. The highly breathable antibacterial and antiviral nonwoven fabric material has a breathability of 26 Pa / cm². 2 The highly breathable antibacterial and antiviral nonwoven fabric material inhibits the activity of Staphylococcus aureus and Escherichia coli, with inhibition zones of approximately 2 mm.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, alterations, and equivalent changes made to the above embodiments based on the inventive essence shall still fall within the protection scope of the present invention.

Claims

1. A method for preparing an antibacterial and antiviral nonwoven fabric material to improve the breathability of protective masks, characterized in that, The method is as follows: S1. Electrospinning solution A is obtained by mixing electrospinnable polymer and polyvinylpyrrolidone. S2. Dissolve the electrospinning solution A obtained in S1 in a solvent, and then add potassium iodide to obtain electrospinning solution B. S3. The electrospinning solution B obtained in S2 is combined with the non-woven fabric material for masks by electrospinning. An electrospinning nanofilm is formed on the surface of the non-woven fabric material for masks that is close to the outside air, and an electrospinning membrane non-woven material is obtained. S4. The electrospun membrane nonwoven material obtained in S3 is soaked in hydrogen peroxide solution and then dried at room temperature and in the dark to obtain a highly breathable antibacterial and antiviral nonwoven fabric material.

2. The method for preparing an antibacterial and antiviral nonwoven fabric material for improving the breathability of protective masks according to claim 1, characterized in that, The electrospinnable polymer described in S1 is one or more of polyacrylonitrile, polylactic acid, polylactic acid hydroxyethyl ester, and polyvinyl alcohol.

3. The method for preparing an antibacterial and antiviral nonwoven fabric material for improving the breathability of protective masks according to claim 1, characterized in that, The mass ratio of the electrospinnable polymer and polyvinylpyrrolidone in S1 is 1:(2-5).

4. The method for preparing an antibacterial and antiviral nonwoven fabric material for improving the breathability of protective masks according to claim 1, characterized in that, The solvent described in S2 is one or more of acetone, N,N-dimethylbisacrylamide, dimethyl sulfoxide, and water.

5. The method for preparing an antibacterial and antiviral nonwoven fabric material for improving the breathability of protective masks according to claim 1, characterized in that, The ratio of electrospinning solution A, solvent and potassium iodide in S2 is (10-50) g: (100-500) mL: (1-10) g.

6. The method for preparing an antibacterial and antiviral nonwoven fabric material for improving the breathability of protective masks according to claim 1, characterized in that, The parameters of the electrospinning method described in S3 are: voltage of 10kV to 50kV, receiving distance of 10cm to 50cm, and time of 2min to 3min.

7. The method for preparing an antibacterial and antiviral nonwoven fabric material for improving the breathability of protective masks according to claim 1, characterized in that, The ratio of the electrospun nonwoven material and the hydrogen peroxide aqueous solution in S4 is 1g:(10~100)mL; the hydrogen peroxide aqueous solution is a hydrogen peroxide aqueous solution with a mass fraction of 1%~10%.

8. The method for preparing an antibacterial and antiviral nonwoven fabric material for improving the breathability of protective masks according to claim 1, characterized in that, The soaking time in S4 is 6 min to 60 min.

9. The method for preparing an antibacterial and antiviral nonwoven fabric material for improving the breathability of protective masks according to claim 1, characterized in that, The high-breathability antibacterial and antiviral nonwoven fabric material described in S4 has a breathability of 25 Pa / cm². 2 ~28Pa / cm 2 The highly breathable antibacterial and antiviral nonwoven fabric material inhibits the activity of Staphylococcus aureus and Escherichia coli.

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