Antibacterial and antiviral degradable mask and manufacturing method thereof

Abstract

An antibacterial and antiviral degradable mask and a manufacturing method thereof are provided. From outside to inside, the mask sequentially comprises a surface layer (1), a core layer (2), and an inner layer (3) that contacts the face; the surface layer (1) is made of an antibacterial and antiviral cellulose spunlace non-woven fabric; the core layer (2) is made of a polypropylene melt-blown non-woven fabric; the inner layer (3) is made of a polypropylene spunbond non-woven fabric or a degradable natural cotton fabric. The mask can have both antibacterial and antiviral functions; moreover, the material is degradable, and thus, environmental pollution pressure caused by non-degradable petroleum-based fiber materials such as polypropylene can be effectively relieved.

Claims

1. A method for preparing an antibacterial and antiviral degradable mask, wherein the antibacterial and antiviral degradable mask comprises a three layered structure, including a surface layer (1), a core layer (2) and an inner layer (3) that contacts a face from outside to inside; the surface layer (1) is made of an antibacterial and antiviral cellulose spunlace non-woven fabric; the core layer (2) is made of a polypropylene melt-blown non-woven fabric; the inner layer (3) is made of a polypropylene spunbond non-woven fabric or a degradable natural cotton fabric; the polypropylene melt-blown non-woven fabric in the core layer (2) possesses with a fiber fineness of 1 m to 3 m and a surface density of 20 g/m.sup.2 to 60 g/m.sup.2; the polypropylene spunbond non-woven fabric in the inner layer (3) possesses a fiber fineness of 20 m to 30 m and a surface density of 20 g/m.sup.2 to 45 g/m.sup.2 and the degradable natural cotton fabric possesses a surface density of 20 g/m.sup.2 to 45 g/m.sup.2; a preparation of the antibacterial and antiviral cellulose spunlace non-woven fabric of surface layer (1) includes following steps S1, mixing cyclohexyl isocyanate and organic solvent with each other in a mass ratio of 1:(5-10), and adding a homogeneous catalyst to prepare a first reaction solution; wherein the homogeneous catalyst is 4-dimethylaminopyridine, triethylamine, or dibutyltin dilaurate; immersing the cellulose spunlace non-woven fabric in the first reaction solution and heating for 0.5 hours to 24 hours for a first covalent grafting reaction, washing the cellulose spunlace non-woven fabric with ethanol and deionized water after the first covalent grafting reaction is completed, followed by drying the cellulose spunlace non-woven fabric; S2, mixing a polymer and dioxane organic solvent with each other in a mass ratio of 1:7 to prepare a second reaction solution; immersing the cellulose spunlace non-woven fabric obtained in Step S1 in the second reaction solution for 3 minutes to 10 minutes for a second reaction; washing the cellulose spunlace non-woven fabric obtained in Step S1 with ethanol after the second reaction is completed, followed by drying the cellulose spunlace non-woven fabric; then, curing front and back sides of the cellulose spunlace non-woven fabric under ultraviolet light including irradiating one side for 3 minutes to 10 minutes; S3, dissolving modified guanidine salt or neomycin sulfate in a solvent to prepare a third reaction solution with a concentration ranging from 0.01 mg/mL to 200 mg/mL and a pH value of pH>7; immersing the cellulose spunlace non-woven fabric obtained in Step S2 in the third reaction solution held at a constant temperature of 60 C. to 100 C. for 4 hours to 24 hours to achieve a second covalent grafting reaction; washing the cellulose spunlace non-woven fabric with ethanol and deionized water after the second covalent grafting reaction is completed, followed by drying the cellulose spunlace non-woven fabric to obtain the antibacterial and antiviral cellulose spunlace non-woven fabric; in Step S2, a structure of the polymer is ##STR00008## where m=1-5, n=10-80; the polymer is synthesized by mixing and dissolving monomers TMA an BPEMA at molar ratio of 95:5 in a dioxane and placing a solution thereof into a circular bottom flask; at the same time adding an azobisisobutyronitrile initiator thereto to form a second solution and performing a polymerizing reaction of the second solution for 8 hours under a nitrogen protection at 80 C.; and washing out the polymer with hexane after the polymerizing reaction is completed then drying the polymer, wherein structural formulas of the monomers TMA and BPEMA is as follows: TMA: ##STR00009## BPEMA: ##STR00010##

2. The method for preparing the antibacterial and antiviral degradable mask according to claim 1, wherein in Step S1, the heating is carried out at a constant temperature of 60 C. to 120 C. for 0.5 hours to 24 hours; the organic solvent includes at least one of N, N-dimethylformamide, acetonitrile, dioxane, and 4-dimethylaminopyridine.

3. The method for preparing the antibacterial and antiviral degradable mask according to claim 1, wherein the solvent in the third reaction solution of step S3 comprises at least one of deionized water, ethanol, and dimethyl sulfoxide.

4. The method for preparing the antibacterial and antiviral degradable mask according to claim 1, wherein the cellulose spunlace non-woven fabric in the surface layer (1) is a carded spunlace non-woven fabric or a wet-laid spunlace non-woven fabric, and a surface density of the carded spunlace non-woven fabric or the wet-laid spunlace non-woven fabric is 20 g/m.sup.2 to 70 g/m.sup.2.

5. The method for preparing the antibacterial and antiviral degradable mask according to claim 4, wherein the carded spunlace non-woven fabric in the surface layer (1) is prepared by sequentially willowing, lapping, carding, and hydroentanglement-reinforcing cellulose fibers and subsequently drying in an oven.

6. The method for preparing the antibacterial and antiviral degradable mask according to claim 5, wherein a length of the cellulose fiber ranges from 28 mm to 58 mm.

7. The method for preparing the antibacterial and antiviral degradable mask according to claim 4, wherein the wet-laid spunlace non-woven fabric in the surface layer (1) is prepared by uniformly mixing 60% to 80% of wood pulp fibers and 20% to 40% of cellulose fibers with each other through beating, followed by mixing, starching, wet-laid forming, hydroentanglement reinforcing, and subsequently drying in an oven.

8. The method for preparing the antibacterial and antiviral degradable mask according to claim 7, wherein a length of the wood pulp fibers ranges from 1 mm to 5 mm, and a length of the cellulose fiber ranges from 6 mm to 16 mm.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 illustrates a combination schematic view of functional layers of an antibacterial and antiviral mask according to the present disclosure.

(2) FIG. 2 illustrates a .sup.1H-NMR spectrum of a polymer according to the present disclosure.

(3) FIG. 3 illustrates a .sup.1H-NMR spectrum of TMA according to the present disclosure.

(4) FIG. 4 illustrates a .sup.1H-NMR spectrum of BPEMA according to the present disclosure.

DESCRIPTION OF EMBODIMENTS

(5) In order to make the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure is further described in detail with reference to specific embodiments below. It should be understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the present disclosure. Unless otherwise indicated, reagents, methods and apparatus used in the present disclosure are conventional in the art.

(6) In addition, it is also to be noted that the terms comprise, include or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, a method, a product, or an apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, product, or apparatus.

(7) Referring to FIG. 1, the present disclosure provides an antibacterial and antiviral mask, which includes a three-layer structure, namely a surface layer 1, a core layer 2 and an inner layer 3 contacting a face from outside to inside. The surface layer 1 is made of an antibacterial and antiviral cellulose spunlace non-woven fabric, the core layer 2 is made of a high-efficiency and low-resistance polypropylene melt-blown non-woven fabric, and the inner layer 3 is made of a water-repellent skin-friendly polypropylene spunbonded non-woven fabric or a degradable natural cotton fabric.

(8) The cellulose spunlace non-woven fabric in the surface layer 1 is a carding spunlace non-woven fabric or a wet-laid spunlace non-woven fabric (ZHEJIANG BAOREN HEZHONG TECHNOLOGY CO., LTD), and the surface density is 20 g/m.sup.2 to 70 g/m.sup.2.

(9) The carding spunlace non-woven fabric in the surface layer (1) is prepared by sequentially willowing, lapping, carding, and hydroentanglement-reinforcing cellulose fibers and eventually drying in an oven, and the length of the cellulose fiber is 28 mm to 58 mm.

(10) The wet-laid spunlace non-woven fabric in the surface layer (1) is prepared by uniformly mixing 60% to 80% of wood pulp fibers and 20% to 40% of cellulose fibers with each other through beating, followed by mixing, starching, wet-laid forming, hydroentanglement reinforcing, and eventually drying in an oven. The length of the wood pulp fibers ranges from 1 mm to 5 mm, and the length of the cellulose fibers ranges from 6 mm to 16 mm.

(11) The preparation method of the antibacterial and antiviral cellulose spunlace non-woven fabric in the surface layer 1 includes the following steps.

(12) In S1, cyclohexyl isocyanate and an organic solvent are mixed with each other, and a catalyst is added to prepare a reaction solution. The vacuum-dried cellulose spunlace non-woven fabric is immersed in the reaction solution, heated for a certain time to perform covalent grafting reaction, washed with ethanol and deionized water after the reaction is completed, and dried.

(13) In S2, a polymer and a dioxane organic solvent are mixed with each other to prepare a reaction solution. The cellulose spunlace non-woven fabric obtained in Step S1 is immersed in the reaction solution for a certain time, the cellulose spunlace non-woven fabric obtained in Step S1 is washed with ethanol after the reaction is completed and dried. And the front and back sides of the non-woven fabric are cured for a certain time by ultraviolet light.

(14) In S3, the modified guanidine salt or neomycin sulfate is dissolved in different solvents to prepare reaction solutions with different concentrations. The cellulose spunlace non-woven fabric obtained in Step S2 is immersed in the reaction solutions. The cellulose spunlace non-woven fabric are heated in different acid-base solutions for a certain time to perform covalent grafting reaction. The cellulose spunlace non-woven fabric is washed with ethanol and deionized water after the reaction is completed, and the cellulose spunlace non-woven fabric is dried to obtain the antibacterial and antiviral cellulose spunlace non-woven fabric.

(15) Preferably, in Step S1, the heating reaction process is performed by reacting at a constant temperature of 60 C. to 120 C. for 0.5 hours to 24 hours.

(16) Preferably, in Step S1, the organic solvent includes one or at least two combinations of N, N-dimethylformamide, acetonitrile, dioxane, 4-dimethylaminopyridine.

(17) Preferably, in Step S1, the catalyst includes one or at least two combinations of triethylamine, dibutyltin dilaurate.

(18) Preferably, in Step S2, the structure of the polymer is:

(19) ##STR00004##
where m=1-5, n=10-80.

(20) Preferably, in Step S2, the immersing time is 3 minutes to 10 minutes, and the ultraviolet light curing time is 3 minutes to 10 minutes for one side.

(21) Preferably, in Step S3, the reaction process is reacting for 4 hours to 24 hours at a constant temperature of 60 C. to 100 C. under the conditions that the concentration of the reaction solution is 2 mg/mL to 200 mg/mL and the pH value ranges from 6 to 10.

(22) Preferably, in Step S3, the reaction solvent includes one or at least two combinations of deionized water, ethanol, and dimethyl sulfoxide.

(23) A high-efficiency low-resistance polypropylene melt-blown non-woven fabric in the core layer 2 (Xuancheng Guangneng non-wovens Co., Ltd.), is with a fiber fineness of 1 m to 3 m, and the surface density is 20 g/m.sup.2 to 60 g/m.sup.2; an interception efficiency of NaCl particles with the size of 0.25 m to 0.3 m is 99% under the condition of an air flow rate of 85 L/min and a pressure drop of 95 Pa. An interception efficiency of NaCl particles with the size of 0.25 m to 0.3 m is 95% under the condition that the air flow rate is 32 L/min, and the pressure drop is 35 Pa.

(24) A polypropylene spun-bonded non-woven fabric in the inner layer 3 (prepared by Donghua University) has the fiber fineness of 20 m to 30 m and the surface density of 20 g/m.sup.2 to 45 g/m.sup.2.

(25) In the following detailed implementations, the antiviral property of the antibacterial and antiviral mask prepared is tested by a virus titer TCID.sub.50 test according to ISO 18184:2019 standard.

(26) The present disclosure will be further described in detail through specific implementation examples and in conjunction with the accompanying drawings.

Example 1

(27) Referring to FIG. 1, this example provides an antibacterial and antiviral mask, the mask includes a three-layers structure, including a surface layer 1, a core layer 2 and an inner layer 3 contacting a face from outside to inside, the surface layer 1 is made of antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric, the core layer 2 is made of a high-efficiency and low-resistance polypropylene melt-blown non-woven fabric, and the inner layer 3 is made of a water-repellent skin-friendly polypropylene spunbonded non-woven fabric or a degradable natural cotton fabric.

(28) The cellulose wet-laid spunlace non-woven fabric in the surface layer 1 is with a surface density of 60 g/m.sup.2, which is prepared by uniformly mixing 75% of wood pulp fiber and 25% of cellulose fiber with each other through beating, followed by mixing, starching, wet-laid forming, hydroentanglement reinforcing, and eventually drying in an oven; the length of the wood pulp fibers ranges from 2 mm to 4 mm, and the length of the cellulose fiber ranges from 12 mm. The preparation method of the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric of the surface layer 1 includes the following steps.

(29) In S1, 4 mL of cyclohexyl isocyanate and 20 mL of N, N-dimethylformamide are mixed with each other, 50 L of dibutyltin dilaurate is added to prepare a reaction solution. The vacuum-dried cellulose wet-laid spunlace non-woven fabric is immersed into the reaction solution, reacted at a constant temperature of 100 C. for 1 hour to perform covalent grafting reaction, washed with ethanol and deionized water after the reaction is completed, and dried.

(30) In S2, 210 mg of polymer and 30 mL of dioxane organic solvent are mixed with each other to prepare a reaction solution, the cellulose we-laid spunlace non-woven fabric obtained in Step S1 is immersed in the reaction solution for 5 minutes. The cellulose wet-laid spunlace non-woven fabric is washed with ethanol after the reaction is completed, and dried. And the non-woven fabric is cured by ultraviolet light for 5 minutes on both the front side and the back side.

(31) In S3, the modified guanidine salt is dissolved in deionized water to prepare a reaction solution with a concentration of 200 mg/mL, the cellulose wet-laid spunlace non-woven fabric obtained in Step S2 is immersed in the reaction solution, reacted at a constant temperature of 80 C. in a solution with the pH of >7 for 24 hours to perform covalent grafting reaction. The cellulose wet-laid spunlace non-woven fabric is washed with ethanol and deionized water after the reaction is completed, and dried to obtain the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric.

(32) In Step S2, the structure of the polymer is:

(33) ##STR00005##
where m=1 and n=14; the polymer is prepared by mixing monomer TMA and BPEMA with each other according to a molar ratio of 95:5 and polymerizing the mixture under the action of azobisisobutyronitrile as an initiator. And the preparation is specifically as follows: TMA and BPEMA are dissolved in dioxane and are placed into a round-bottom flask, meanwhile, azobisisobutyronitrile initiator is added, polymerization reaction is carried out for 8 hours under the nitrogen protection at the temperature of 80 C., the polymer is washed out with hexane after the reaction is completed, and dried. The tested .sup.1H-NMR spectrum structure is as illustrated in FIG. 2.

(34) The structure of the monomer TMA is as follows:

(35) ##STR00006##
the preparation process includes the following steps. Thiourea and neutral alumina are mixed with each other in the molar ratio of 1:3, grinded uniformly. Glycidyl methacrylate is slowly added into the uniform mixture by half of the molar mass of thiourea, and further grinded. After standing for one hour, the monomer TMA is washed out with ethyl acetate, and the 1H-NMR spectrum structure is tested as illustrated in FIG. 3.

(36) The structure of the monomer BPEMA is as follows:

(37) ##STR00007##
the preparation process includes the following steps. i) 4-hydroxybenzophenone and ethylene carbonate (molar ratio 1:1), toluene and sodium iodide are mixed, heated at 100 C. to obtain a clear solution, and then the temperature is raised to 180 C. to react for 2 hours. Eventually, the reaction is cooled, 100 mL of toluene and 25 mL of water are added to extract the organic phase product, the organic phase is further washed twice with water and dried with MgSO.sub.4 and the solvent is removed to obtain 4-(2-hydroxyethoxy)benzophenone. ii) The obtained 4-(2-hydroxyethoxy)benzophenone and triethylamine (the molar ratio of 2:3) are dissolved in dichloromethane and the reaction mixture is cooled in an ice bath under the nitrogen atmosphere. Then, methacryloyl chloride dissolved in methylene chloride is added dropwise to the above reaction mixture, the reaction is continued at room temperature overnight, and then transferred to a separatory funnel, washed with cold water, an aqueous solution of sodium hydrogencarbonate, and water, dried with MgSO.sub.4 and filtered to remove the solvent to obtain monomeric BPEMA, the tested .sup.1H-NMR spectrum is as illustrated in FIG. 4.

(38) A high-efficiency low-resistance polypropylene melt-blown non-woven fabric in the core layer 2 is with a fiber fineness of 2.5 m and a surface density of 40 g/m.sup.2. A polypropylene spun-bonded non-woven fabric in the inner layer 3 is with the fiber fineness of 24 m, and the surface density is 25 g/m.sup.2.

(39) The antibacterial and antiviral mask prepared in Example 1 has an antiviral activity rate up to 95.96% against coronavirus HCoV-229E, 99.72% against COVID-19 coronavirus SARS-CoV-2, 99.99% against Escherichia coli and Staphylococcus aureus, and a droplet contact angle of 118.7.

Example 2

(40) This example provides an antibacterial and antiviral mask, which is different from that of Example 1 in that: in Step S3, the modified guanidine salt is dissolved in deionized water to prepare a reaction solution with a concentration of 100 mg/mL, and the rest is the same as in Example 1.

Example 3

(41) This example provides an antibacterial and antiviral mask, which is different from that of Example 1 in that: in Step S3, the modified guanidine salt is dissolved in deionized water to prepare a reaction solution having a concentration of 25 mg/mL, and the rest is the same as in Example 1.

Example 4

(42) This example provides an antibacterial and antiviral mask, which is different from that of Example 1 in that: in Step S3, the modified guanidine salt is dissolved in deionized water to prepare a reaction solution with a concentration of 5 mg/mL, and the rest is the same as in Example 1.

Example 5

(43) This example provides an antibacterial and antiviral mask, which is different from that of Example 1 in that: the preparation method of the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric in the surface layer 1 includes the following steps.

(44) In S1, 4 mL of cyclohexyl isocyanate and 20 mL of N, N-dimethylformamide are mixed with each other, 50 L of dibutyltin dilaurate is added to prepare a reaction solution. The vacuum-dried cellulose wet-laid spunlace non-woven fabric is immersed into the reaction solution, reacted at constant temperature of 100 C. for 1 hour for covalent grafting reaction, washed with ethanol and deionized water after the reaction is completed, and dried.

(45) In S2, 210 mg of polymer and 30 mL of dioxane organic solvent are mixed with each other to prepare a reaction solution, the cellulose wet-laid spunlace non-woven fabric obtained in Step S1 is immersed in the reaction solution for 5 minutes, the cellulose wet-laid spunlace non-woven fabric is washed with ethanol after the reaction is completed and dried. And the non-woven fabric is cured by ultraviolet light, for 5 minutes on both the front side and the back side.

(46) In S3, neomycin sulfate is dissolved in deionized water to prepare a reaction solution with the concentration of 200 mg/mL. The cellulose wet-laid spunlace non-woven fabric obtained in Step S2 is immersed in the reaction solution, reacted at a constant temperature of 80 C. in a solution with the pH value of pH>7 for 24 hours to perform covalent grafting reaction, washed with ethanol and deionized water after the reaction is completed, and dried to obtain the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric.

(47) The rest is the same as in Example 1.

(48) The antibacterial and antiviral mask prepared by this example has the antiviral activity rate up to 97.85% against HCoV-229E, 99.29% against SARS-COV-2, 99.99% against Escherichia coli and Staphylococcus aureus, and a droplet contact angle of 119.6.

Example 6

(49) This example provides an antibacterial and antiviral mask, which is different from that of Example 5 in that: in Step S3, neomycin sulfate is dissolved in deionized water to prepare a reaction solution having a concentration of 100 mg/mL, and the rest is the same as in Example 5.

Example 7

(50) This example provides an antibacterial and antiviral mask, which is different from that of Example 5 in that: in Step S3, neomycin sulfate is dissolved in deionized water to prepare a reaction solution having a concentration of 25 mg/mL, and the rest is the same as in Example 5.

Example 8

(51) This example provides an antibacterial and antiviral mask, which is different from that of Example 5 in that: in Step S3, neomycin sulfate is dissolved in deionized water to prepare a reaction solution having a concentration of 5 mg/mL, and the rest is the same as in Example 5.

Comparative Example 1

(52) This example provides an antibacterial and antiviral mask, which is different from that of Example 1 in that: the preparation method of the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric in the surface layer 1 includes the following steps.

(53) In S1, 210 mg of polymer and 30 mL of dioxane organic solvent are mixed with each other to prepare a reaction solution, the cellulose wet-laid spunlace non-woven fabric is immersed in the reaction solution for 5 minutes, the non-woven fabric is washed by ethanol after the reaction is completed, and dried, and the non-woven fabric is cured by ultraviolet light, for 5 minutes on both the front side and the back side.

(54) In S2, the modified guanidine salt is dissolved in deionized water to prepare a reaction solution with the concentration of 200 mg/mL, the cellulose wet-laid spunlace non-woven fabric obtained in Step S1 is immersed in the reaction solution, reacted at a constant temperature of 80 C. in a solution with the pH value of pH>7 for 24 hours to perform covalent grafting reaction, washed with ethanol and deionized water after the reaction is completed, and dried to obtain the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric.

(55) The rest is the same as in Example 1.

(56) The antibacterial and antiviral mask prepared by this comparative example has the antiviral activity rate up to 96.03% against HCoV-229E, 99.84% against SARS-COV-2, 99.99% against Escherichia coli and Staphylococcus aureus and a droplet contact angle is 65.4.

Comparative Example 2

(57) This example provides an antibacterial and antiviral mask, which is different from that of Example 5 in that: the preparation method of the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric in the surface layer 1 includes the following steps.

(58) In S1, 210 mg of polymer and 30 mL of dioxane organic solvent are mixed with each other to prepare a reaction solution, the cellulose wet-laid spunlace non-woven fabric is immersed in the reaction solution for 5 minutes, the non-woven fabric is washed by ethanol after the reaction is completed, and dried, and the non-woven fabric is cured by ultraviolet light, for 5 minutes on both the front side and the back side.

(59) In S2, neomycin sulfate is dissolved in deionized water to prepare a reaction solution with the concentration of 200 mg/mL, the cellulose wet-laid spunlace non-woven fabric obtained in Step S1 is immersed in the reaction solution, reacted at a constant temperature of 80 C. in a solution with the pH value of pH>7 for 24 hours to perform covalent grafting reaction, washed with ethanol and deionized water after the reaction is completed, and dried to obtain the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric.

(60) The rest is the same as in Example 5.

(61) The antibacterial and antiviral mask prepared by this comparative example has the antiviral activity rate up to 98.21% against HCoV-229E, 99.35% against SARS-COV-2, 99.99% against Escherichia coli and Staphylococcus aureus and a droplet contact angle is 57.5.

(62) The masks made of the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric provided in the above examples and comparative examples are tested for antibacterial and antiviral properties and filtration efficiency, and the results are as shown in Table 1.

(63) TABLE-US-00001 TABLE 1 Test item Filtering Hydrophilicity efficiency test test Antibacterial property testing Antivirus property testing Filtering Contact angle Antibacterial rate (%) Antiviral activity (%) efficiency (%) () Object Coronavirus COVID-19 Sodium chloride Escherichia coli Staphylococcus aureus HCoV-229E SARS-CoV-2 aerosol Water droplet Example 1 99.99 99.99 95.96 99.72 99 118.7 Example 2 99.99 99.99 95.78 99.13 99 119.9 Example 3 99.92 99.83 94.26 99.09 99 119.1 Example 4 99.04 98.79 93.12 98.25 99 120.9 Example 5 99.99 99.99 97.85 99.29 99 119.6 Example 6 99.99 99.99 97.54 99.11 99 119.7 Example 7 99.12 99.72 97.19 98.95 99 120.1 Example 8 98.68 99.01 95.32 98.02 99 121.2 Comparative example 1 99.99 99.99 96.03 99.84 99 65.4 Comparative example 2 99.99 99.99 98.21 99.35 99 57.5

(64) As can be seen from Table 1, the mask prepared by the present disclosure has excellent antibacterial and antiviral properties, the antibacterial rate against Escherichia coli and Staphylococcus aureus is up to 99.99%, the antiviral activity against HCoV-229E is up to 98.21%, the antiviral activity against SARS-COV-2 is up to 99.35%, and the antibacterial and antiviral activity against PM.sub.2.5 in the air is up to 99.99%.

(65) As can be seen by comparing Examples 1 to 4 with Examples 5 to 8, the examples adopt the antibacterial and antiviral mask of the present disclosure, and the antibacterial and antiviral effects increase as the increase of the grafting reaction concentration of the modified guanidinium salt or neomycin sulfate.

(66) It can be seen from comparison between Example 1 (Example 5) and Comparative Example 1 (Comparative Example 2) that although the antibacterial and antiviral mask without hydrophobic modification has a better antiviral effect, the contact angle is smaller and the self-cleaning property is poorer, which indicates that the antibacterial and antiviral cellulose wet-laid spunlace non-woven fabric with hydrophobic modification is suitable for being used as a surface layer material of the mask, and the non-woven fabric without hydrophobic modification can be used as an inner layer material of the mask, so that the prepared mask has excellent antibacterial and antiviral properties and filtering efficiency.

(67) The above are only illustrative embodiments of the present disclosure and are not limitations on any form or substance of the present disclosure. It should be pointed out that for ordinary technical personnel in this art, without departing from the methods of the present disclosure, a plurality of improvements and supplements made should also be considered as the protection scope of the present disclosure; equivalent alterations such as minor changes, modifications, and evolution made by the technical personnel familiar with this art by using the above disclosed technical contents without departing from the spirit and scope of the present disclosure are all equivalent embodiments of the present disclosure; meanwhile, all changes, modifications and evolutions of the equivalent alterations made to the above embodiments according to the substantive technology of the present disclosure are still within the protection scope of the present disclosure.