CN111359001B - Preparation method of nano composite negative ion sterilization rapid mucosa - Google Patents
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
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Abstract
The invention provides a preparation method of a nano-composite negative ion sterilization rapid mucosa, and the surface negative ion release amount of the nano-composite negative ion sterilization rapid mucosa is 7000 pieces/cm in 5000-3The sterilization efficiency of the quick adhesive film can reach 99.80-99.99 percent, the quick adhesive film is composed of an anion substrate, graphene, nano silver ions and the like, the quick adhesive film has the characteristic of long-acting sterilization, when the quick adhesive film is contacted with bacteria in the air, a large number of anions are released, the anions and the silver ions are attracted in an opposite way and act on sterilization together, meanwhile, the graphene can effectively play a role of protection, the stability of the graphene is enhanced, the flexible anion substrate film is favorable for releasing the anions, a porous structure is more favorable for playing a role of slow release, so that the quick adhesive film has a better antiviral effect, is convenient for germ attachment, and can be widely applied to any bacteria concentrated positions such as door handles, elevator keys, toilet sides and the like in various public places.
Description
Technical Field
The invention belongs to the technical field of composite film preparation, and particularly relates to a preparation method of a nano composite negative ion sterilization rapid mucosa.
Background
The daily life of people can be contacted with various harmful microorganisms such as bacteria and viruses, with the improvement of science and technology, people have prevailed over many diseases caused by the microorganisms such as bacteria and viruses, but new viruses are in a variety, and the new outbreak of the novel coronavirus in 2019 and 12 months causes serious threat and harm to the life health of people, the transmission routes are various, and the viruses are found on the door handles of patients with definite diagnosis of the novel coronavirus pneumonia in 2-3 months in 2020, Guangzhou for the first time, so that the environmental disinfection in public places and the bacterial and viral disinfection on the surfaces of public articles which can be contacted by hands are urgently expected by the public.
The Guangzhou disease prevention and control center is assistant and master and overseeing a bin introduces the transmission path of the novel coronavirus, and the transmission path of the contact includes direct contact transmission and indirect contact transmission. For the general community residents, the risks are more from indirect contacts such as frequently touched elevator keys, door handles, water taps, computer keyboards, mice, mobile phones, light switches, floors, toilets and the like.
The invention aims at the public equipment parts related to the contact propagation, such as elevator keys, door handles, toilet edges and the like, and develops a novel sterilization rapid adhesive film which can uniformly release anions with certain concentration in the air and achieves the effects of actively and widely capturing peripheral bacteria and viruses and effectively killing the bacteria and the viruses through the dual actions of the anions and a film surface layer sterilization material.
Disclosure of Invention
In order to solve the problems in the prior art and further optimize the prior process, the invention provides a preparation method of a nano composite negative ion sterilization rapid mucosa, which aims to realize the following purposes:
1. the sterilization property of the negative ions is fully utilized, and the opposite attraction of the negative ions and the silver ions is fully utilized to improve the sterilization effect of the membrane;
2. the instant disinfection mode of the traditional spray disinfection liquid is changed, and the disinfection durability is improved;
3. the touch control device has the advantages that the touch control device can be applied to a wider application scene, and can be used for frequent touch points in daily life such as elevator keys, public door handles, water taps, light switches and the like, and can also be used for food preservation of vegetables and the like;
4. the thermal stability of the nano film is improved;
5. the mechanical strength of the nano film is improved;
in order to solve the technical problems, the invention adopts the following technical scheme:
the preparation method of the nano composite negative ion sterilization rapid mucosa is characterized in that the surface negative ion release amount of the nano composite negative ion sterilization rapid mucosa is 7000 pieces/cm3；
The preparation method of the nano composite negative ion sterilization rapid-adhesion membrane comprises the steps of preparation of a polypropylene negative ion base membrane, preparation of a nano graphene composite antibacterial agent dispersion liquid, coating of a film base material and drying and forming;
the preparation of the polypropylene anion-based membrane comprises the following raw materials in parts by weight:
50-60 parts of polypropylene, 12-20 parts of polystyrene, 18-25 parts of nano-anion liquid, 3-8 parts of nucleating agent, 3-8 parts of cross-linking agent and 2-5 parts of dispersing agent;
the pH value of the nano negative ion liquid is 5-8, and the concentration of the aqueous solution is 30-40 wt%;
the nucleating agent is a polypropylene beta-crystal nucleating agent;
the cross-linking agent is a heat-resistant ultraviolet curing cross-linking agent and comprises one of N, N-dicyclohexyl-2, 6-naphthaloyl or 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide;
the preparation of the polypropylene negative ion base membrane comprises dipping treatment, wherein the dipping temperature is 35-40 ℃, the dipping time is 4-5h, the dipping solution is a methanol/chloroform mixed solvent, and the volume ratio of methanol/chloroform is 4-5: 1;
the preparation of the polypropylene anion-based membrane also comprises cross-linking and curing, wherein the ultraviolet light intensity is 20-30mW/cm2, and the irradiation time is 5-6 h;
the preparation method of the nano graphene composite antibacterial agent dispersion liquid comprises the following steps of (1-3): 10;
the addition amount of the sodium carboxymethylcellulose is 2-5 wt%;
the antibacterial agent comprises a mixture of nano silver powder, high-activity nano zinc oxide and titanium oxide, wherein the mixing mass ratio of the nano silver powder to the high-activity nano zinc oxide to the titanium oxide is 1: 8-10: 12-15, wherein the concentration of the antibacterial agent accounts for 15-20wt% of the total weight of the dispersion liquid;
the nano graphene powder has the density of 0.38-0.42g/cm3, the porosity of 82-85% and the surface particle size of 20-25 mu m;
the coating of the film substrate adopts a supercritical CO2 fluid coating mode, wherein the temperature and the pressure of CO2 fluid are increased to 30-45 ℃ and 10-12 MPa;
the aperture of the fine nozzle is 5-30 μm;
decompressing and expanding, decompressing to normal pressure and room temperature, wherein the impact distance is 40-100mm, and the impact time is 5-8 min; the average film thickness is 10-16 μm;
drying and forming at 50-60 ℃ and 6-10m/s of wind speed;
compared with the common sterilization film, the following improvements are made: 1. the polypropylene basal membrane is prepared by nano negative ion materials, and the polypropylene basal membrane is contacted with air to release negative ions with a certain concentration, so that peripheral bacteria and viruses are actively captured and killed, and the porous structure is convenient for the attachment of the bacteria and viruses; 2. through the mixed preparation of the sterilization materials and the specific process coating of the nano graphene, the sterilization durability is improved, and the comprehensive sterilization effect is facilitated; 3. the dual-function effect of capturing and killing the negative ion bacteria and viruses and sterilizing the surface layer is achieved through special materials and preparation processes thereof;
the nano composite negative ion sterilization rapid adhesive film disclosed by the invention comprises a negative ion base material, graphene, nano silver ions and the like, has the characteristic of long-acting sterilization, when the sterilization rapid adhesive film is contacted with bacteria in the air, a large number of negative ions are released, the negative ions and the silver ions are attracted in an opposite way and act on sterilization together, meanwhile, the graphene can effectively play a role of protection, the stability of the graphene is enhanced, the release of the negative ions of a flexible negative ion base film is facilitated, and a porous structure is more beneficial to playing a role of slow release, so that the nano composite negative ion sterilization rapid adhesive film has a better antiviral effect, is convenient for bacteria to attach, and can be widely applied to any bacteria concentrated positions of various public places such as door handles, elevator keys, toilet.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the nano composite negative ion sterilization rapid mucosa prepared by the preparation method has excellent antibacterial effect, the sterilization efficiency on escherichia coli, staphylococcus aureus and candida albicans can reach 99.80-99.99%, the negative ion release concentration on the surface of the basement membrane reaches 5000-7000 ions/cm 3, and the nano composite negative ion sterilization rapid mucosa has antibacterial durability
2. By adopting the preparation method, the prepared nano composite negative ion quick sterilization mucosa has lasting sterilization effect, the effective rate of the nano composite negative ion quick sterilization mucosa is 99% after 7 days, and the effective rate of the nano composite negative ion quick sterilization mucosa is more than 95% after 30 days, so that the problem of poor durability of an instant sterilization mode of the traditional spray sterilization liquid is solved;
3. the nano composite negative ion sterilization quick mucosa prepared by the preparation method has excellent performance, the film thickness is 0.2-0.6mm, the longitudinal softness reaches 120-590 mN, the transverse softness reaches 60-72mN, and the tensile breaking strength reaches 560-590 MPa;
4. by adopting the preparation method, the thermal stability of the rapid-adhesion membrane can be improved, the nano composite negative ion sterilization membrane has good thermal stability, is not easy to deform and melt at high temperature, can resist the temperature of 120-;
5. experiments show that the film prepared by the invention has a certain killing effect on influenza viruses.
The specific implementation mode is as follows:
the invention is further illustrated below with reference to specific examples.
Example 1 preparation method of nano composite negative ion bactericidal rapid mucosa
1. Preparing a polypropylene negative ion base film:
the preparation method of the polypropylene anion-based membrane comprises the following steps:
1) mixing polypropylene slices, polystyrene particles, nano negative ion components, nucleating agents and other raw materials in proportion, adding the mixture into a single-screw extruder, fully melting and mixing at 190 ℃, and extruding and calendaring to obtain a prefabricated film with the thickness of 0.25 mm;
the raw materials comprise the following components in parts by weight:
50 parts of polypropylene, 12 parts of polystyrene, 18 parts of nano negative ion liquid, 8 parts of nucleating agent, 8 parts of crosslinking agent and 4 parts of dispersing agent;
the nucleating agent is a polypropylene beta-crystal nucleating agent;
the cross-linking agent is a heat-resistant ultraviolet curing cross-linking agent and is N, N-dicyclohexyl-2, 6-naphthaloyl;
the pH value of the nano negative ion liquid is 5.0, and the concentration of the aqueous solution is 30 wt%;
2) dipping the prefabricated film in a methanol/chloroform mixed solvent, heating to 35 ℃, dipping for 4 hours to remove part of polystyrene embedded in the film through solvation, forming irregular cavities in the film, and drying at 60 ℃;
the volume ratio of the methanol to the chloroform of the methanol/chloroform mixed solvent is 4: 1;
3) placing the dried polypropylene porous membrane under ultraviolet light for crosslinking and curing, adjusting the ultraviolet light intensity to be 20mW/cm2, and the irradiation time is 5h, so that the stability of the crosslinked polypropylene porous membrane is improved;
the polypropylene negative ion base membrane prepared by the method has the pore size distribution range of 100nm-1 mu m, the void ratio can reach 16.5 percent, and the contact angle between the surface and water is 137 degrees;
2. preparation of nano graphene composite antibacterial agent dispersion liquid
Adding the nano-graphene powder into a DMF solution, adding a dispersion agent sodium carboxymethyl cellulose, and mechanically stirring at the rotating speed of 750r/min for 20-min to obtain a nano-graphene dispersion liquid;
heating to 50 ℃, adding the antibacterial agent into the dispersion liquid containing the nano graphene while stirring, and after the addition is finished, placing the dispersion liquid under 400W for continuing ultrasonic oscillation for 2 hours; effectively dispersing the graphene dispersion liquid and the nano silver ions to obtain a nano graphene composite antibacterial agent dispersion liquid;
the nano graphene powder has the density of 0.38g/cm3, the porosity of 82% and the surface particle size of 20 microns;
the addition amount of the sodium carboxymethylcellulose is 2.5 wt%;
the antibacterial agent comprises a mixture of nano silver powder, high-activity nano zinc oxide and titanium oxide, wherein the mixing mass ratio of the nano silver powder to the high-activity nano zinc oxide to the titanium oxide is 1: 8: 12, the concentration of the antibacterial agent accounts for 15wt% of the total weight of the dispersion liquid;
the mass ratio of the nano graphene powder to the antibacterial agent is 1: 10;
3. coating of film substrates
Heating and pressurizing supercritical CO2 fluid to 30 ℃ and 12MPa, introducing the fluid into a high-pressure extraction kettle filled with nano graphene composite antibacterial agent dispersion liquid, sealing and extracting for 1.5, heating a pipeline, controlling the pre-expansion temperature to be 90 ℃, then performing reduced pressure expansion through a fine nozzle to form impact flow falling on the surface of a polypropylene negative ion base membrane, cooling to obtain a nano composite negative ion sterilization membrane, wherein CO2 can be recycled;
the aperture of the fine nozzle is 5-10 mu m;
decompressing and expanding, decompressing to normal pressure and room temperature, wherein the impact distance is 40mm, and the impact time is 5 min; the average film thickness is 10-12 μm;
4. drying and forming
Spraying an adhesive layer and a leveling agent on one side surface of the nano composite negative ion sterilization film, attaching a commercially available release paper on the other side of the adhesive layer, drying by hot air, drying and curing the surface to obtain the nano composite negative ion sterilization quick-adhesion film, which can be easily attached to door handles, toilet sides, elevator keys and other positions;
the adhesive layer is an acrylic adhesive; the flatting agent is polyether modified polydimethylsiloxane;
and drying by hot air at the temperature of 50 ℃ and the air speed of 6 m/s.
Example 2 preparation method of nano composite negative ion sterilization rapid mucosa
2. Preparing a polypropylene negative ion base film:
the preparation method of the polypropylene anion-based membrane comprises the following steps:
2) mixing polypropylene slices, polystyrene particles, nano negative ion components, nucleating agents and other raw materials in proportion, adding the mixture into a single-screw extruder, fully melting and mixing at 210 ℃, and extruding and calendaring to obtain a prefabricated film with the thickness of 0.44 mm;
the raw materials comprise the following components in parts by weight:
55 parts of polypropylene, 16 parts of polystyrene, 21 parts of nano negative ion liquid, 3 parts of nucleating agent, 3 parts of crosslinking agent and 2 parts of dispersing agent;
the nucleating agent is a polypropylene beta-crystal nucleating agent;
the cross-linking agent is heat-resistant ultraviolet curing cross-linking agent N, N-dicyclohexyl-2, 6-naphthaloyl;
the pH value of the nano negative ion liquid is 6.5, and the concentration of the aqueous solution is 36 wt%;
2) dipping the prefabricated film in a methanol/chloroform mixed solvent, heating to 40 ℃, dipping for 4 hours to remove part of polystyrene embedded in the film through solvation, forming irregular cavities in the film, and drying at 60 ℃;
the volume ratio of the methanol to the chloroform of the methanol/chloroform mixed solvent is 4: 1;
3) placing the dried polypropylene porous membrane under ultraviolet light for crosslinking and curing, adjusting the ultraviolet light intensity to be 25mW/cm2, and the irradiation time is 5h, so that the stability of the crosslinked polypropylene porous membrane is improved;
the polypropylene negative ion base membrane prepared by the method has the pore size distribution range of 100nm-10 mu m, the void ratio can reach 18 percent, and the contact angle between the surface and water is 138.5 degrees;
2. preparation of nano graphene composite antibacterial agent dispersion liquid
Adding the nano-graphene powder into a DMF solution, adding a dispersion agent sodium carboxymethyl cellulose, and mechanically stirring at the rotating speed of 750r/min for 20min to obtain a nano-graphene dispersion liquid;
heating to 50 ℃, adding the antibacterial agent into the dispersion liquid containing the nano graphene while stirring, and after the addition is finished, placing the dispersion liquid under 400W for continuing ultrasonic oscillation for 4 hours; effectively dispersing the graphene dispersion liquid and the nano silver ions to obtain a nano graphene composite antibacterial agent dispersion liquid;
the nano graphene powder has the density of 0.40g/cm3, the porosity of 83% and the surface particle size of 20 microns;
the addition amount of the sodium carboxymethylcellulose is 3.8 wt%;
the antibacterial agent comprises a mixture of nano silver powder, high-activity nano zinc oxide and titanium oxide, wherein the mixing mass ratio of the nano silver powder to the high-activity nano zinc oxide to the titanium oxide is 1: 8: 15, the concentration of the antibacterial agent accounts for 15wt% of the total weight of the dispersion liquid;
the mass ratio of the nano graphene powder to the antibacterial agent is 1.8: 10;
3. coating of film substrates
Heating and pressurizing supercritical CO2 fluid to 40 ℃ and 10MPa, feeding the fluid into a high-pressure extraction kettle filled with nano graphene composite antibacterial agent dispersion liquid, sealing and extracting for 2 hours, heating a pipeline, controlling the pre-expansion temperature to be 92 ℃, decompressing and expanding through a fine nozzle to form impact flow falling on the surface of a polypropylene negative ion base membrane, cooling to obtain a nano composite negative ion sterilization membrane, wherein CO2 can be recycled;
the aperture of the fine nozzle is 5-10 mu m;
decompressing and expanding, decompressing to normal pressure and room temperature, wherein the impact distance is 60mm, and the impact time is 5 min; the average film thickness is 10-14 μm;
4. drying and forming
Spraying an adhesive layer and a leveling agent on one side surface of the nano composite negative ion sterilization film, attaching a commercially available release paper on the other side of the adhesive layer, drying by hot air, drying and curing the surface to obtain the nano composite negative ion sterilization quick-adhesion film, which can be easily attached to door handles, toilet sides, elevator keys and other positions;
the adhesive layer is an acrylic adhesive; the flatting agent is polyether modified polydimethylsiloxane;
and drying by hot air at the temperature of 60 ℃ and the air speed of 6 m/s.
Example 3 preparation method of nano composite negative ion sterilization rapid mucosa
3. Preparing a polypropylene negative ion base film:
the preparation method of the polypropylene anion-based membrane comprises the following steps:
3) mixing polypropylene slices, polystyrene particles, nano negative ion components, nucleating agents and other raw materials in proportion, adding the mixture into a single-screw extruder, fully melting and mixing at 210 ℃, and extruding and calendaring to obtain a prefabricated film with the thickness of 0.6 mm;
the raw materials comprise the following components in parts by weight:
60 parts of polypropylene, 14 parts of polystyrene, 18 parts of nano negative ion liquid, 3 parts of nucleating agent, 3 parts of crosslinking agent and 2 parts of dispersing agent;
the nucleating agent is a polypropylene beta-crystal nucleating agent;
the cross-linking agent is heat-resistant ultraviolet curing cross-linking agent 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide;
the pH value of the nano negative ion liquid is 8.0, and the concentration of the aqueous solution is 40 wt%;
2) dipping the prefabricated film in a methanol/chloroform mixed solvent, heating to 40 ℃, dipping for 5 hours to remove part of polystyrene embedded in the film through solvation, forming irregular cavities in the film, and drying at 60 ℃;
the volume ratio of the methanol to the chloroform of the methanol/chloroform mixed solvent is 5: 1;
3) placing the dried polypropylene porous membrane under ultraviolet light for crosslinking and curing, adjusting the ultraviolet light intensity to be 30mW/cm2, and the irradiation time is 6h, so that the stability of the crosslinked polypropylene porous membrane is improved;
the polypropylene negative ion base membrane prepared by the method has the pore size distribution range of 1-10 mu m, the void ratio of 20 percent and the contact angle between the surface and water of 139.5 degrees;
2. preparation of nano graphene composite antibacterial agent dispersion liquid
Adding the nano-graphene powder into a DMF solution, adding a dispersion agent sodium carboxymethyl cellulose, and mechanically stirring at the rotating speed of 800r/min for 30min to obtain a nano-graphene dispersion liquid;
heating to 50 ℃, adding the antibacterial agent into the dispersion liquid containing the nano graphene while stirring, and after the addition is finished, placing the dispersion liquid under 500W for continuing ultrasonic oscillation for 4 hours; effectively dispersing the graphene dispersion liquid and the nano silver ions to obtain a nano graphene composite antibacterial agent dispersion liquid;
the nano graphene powder has the density of 0.42g/cm3, the porosity of 85% and the surface particle size of 25 microns;
the addition amount of the sodium carboxymethylcellulose is 5 wt%;
the antibacterial agent comprises a mixture of nano silver powder, high-activity nano zinc oxide and titanium oxide, wherein the mixing mass ratio of the nano silver powder to the high-activity nano zinc oxide to the titanium oxide is 1: 10: 15, the concentration of the antibacterial agent accounts for 20wt% of the total weight of the dispersion liquid;
the mass ratio of the nano graphene powder to the antibacterial agent is 3: 10;
3. coating of film substrates
Heating and pressurizing supercritical CO2 fluid to 45 ℃ and 10MPa, feeding the fluid into a high-pressure extraction kettle filled with nano graphene composite antibacterial agent dispersion liquid, sealing and extracting for 2 hours, heating a pipeline, controlling the pre-expansion temperature to be 92 ℃, decompressing and expanding through a fine nozzle to form impact flow falling on the surface of a polypropylene negative ion base membrane, cooling to obtain a nano composite negative ion sterilization membrane, wherein CO2 can be recycled;
the aperture of the fine nozzle is 20-30 μm;
decompressing and expanding, decompressing to room temperature at normal pressure, wherein the impact distance is 100mm, and the impact time is 8 min; the average film thickness is 14-16 μm;
4. drying and forming
Spraying an adhesive layer and a leveling agent on one side surface of the nano composite negative ion sterilization film, attaching a commercially available release paper on the other side of the adhesive layer, drying by hot air, drying and curing the surface to obtain the nano composite negative ion sterilization quick-adhesion film, which can be easily attached to door handles, toilet sides, elevator keys and other positions;
the adhesive layer is an acrylic adhesive; the flatting agent is polyether modified polydimethylsiloxane;
and drying by hot air at the temperature of 50 ℃ and the air speed of 10 m/s.
By adopting the preparation method of the invention, the nano composite negative ion sterilization rapid mucosa prepared in the examples 1-3 is subjected to relevant detection, and the results are as follows:
finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The preparation method of the nano composite negative ion sterilization rapid mucosa is characterized in that the surface negative ion release amount of the nano composite negative ion sterilization rapid mucosa is 5000-7000/cm 3;
the preparation method comprises the steps of preparing a polypropylene negative ion base film and preparing nano graphene composite antibacterial agent dispersion liquid;
the preparation of the polypropylene anion-based membrane comprises the following raw materials in parts by weight:
50-60 parts of polypropylene, 12-20 parts of polystyrene, 18-25 parts of nano-anion liquid, 3-8 parts of nucleating agent, 3-8 parts of cross-linking agent and 2-5 parts of dispersing agent;
the preparation of the polypropylene negative ion base membrane comprises dipping treatment, wherein the dipping temperature is 35-40 ℃, the dipping time is 4-5h, the dipping solution is a methanol/chloroform mixed solvent, and the volume ratio of methanol/chloroform is 4-5: 1.
2. The method for preparing the nano composite anion bactericidal rapid mucosa as claimed in claim 1, wherein the pH of the nano anion liquid is 5-8, and the concentration of the aqueous solution is 30-40 wt%.
3. The method for preparing the nano composite negative ion sterilization rapid mucosa according to claim 1, wherein the nucleating agent is a polypropylene beta crystal nucleating agent; the cross-linking agent is a heat-resistant ultraviolet curing cross-linking agent and comprises one of N, N-dicyclohexyl-2, 6-naphthaloyl or 2, 5-dimethyl-2, 5-di-tert-butyl hexane peroxide.
4. The method for preparing the nano composite anion sterilization rapid adhesive film according to claim 1, wherein the preparation of the polypropylene anion-based film further comprises cross-linking and curing, and the ultraviolet light intensity is 20-30mW/cm2And the irradiation time is 5-6 h.
5. The method for preparing the nano composite negative ion sterilization rapid mucosa according to claim 1, wherein the nano graphene composite antibacterial agent dispersion liquid is prepared, and the mass ratio of nano graphene powder to antibacterial agent is 1-3: 10.
6. the method for preparing the nano composite negative ion sterilization rapid mucosa according to claim 5, wherein the antibacterial agent comprises a mixture of nano silver powder, high-activity nano zinc oxide and titanium oxide, and the mass ratio of the mixture of the nano silver powder, the high-activity nano zinc oxide and the titanium oxide is 1: 8-10: 12-15, wherein the concentration of the antibacterial agent accounts for 15-20wt% of the total weight of the dispersion liquid.
7. The method for preparing the nano composite negative ion sterilization rapid mucosa according to claim 5, wherein the density of the nano graphene powder is 0.38-0.42g/cm3The porosity is 82-85%, and the surface grain size is 20-25 μm.
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