CN111732906A - Antiviral and antibacterial functional film and preparation method thereof - Google Patents

Antiviral and antibacterial functional film and preparation method thereof Download PDF

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Publication number
CN111732906A
CN111732906A CN202010425174.8A CN202010425174A CN111732906A CN 111732906 A CN111732906 A CN 111732906A CN 202010425174 A CN202010425174 A CN 202010425174A CN 111732906 A CN111732906 A CN 111732906A
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China
Prior art keywords
antibacterial
antiviral
agent
stirring
coating
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CN202010425174.8A
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Chinese (zh)
Inventor
陈晓东
李毕忠
杨明
施克炜
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Beijing Chamgo Nano Tech Co ltd
Taihu Jinzhang Technology Co ltd
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Beijing Chamgo Nano Tech Co ltd
Taihu Jinzhang Technology Co ltd
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Application filed by Beijing Chamgo Nano Tech Co ltd, Taihu Jinzhang Technology Co ltd filed Critical Beijing Chamgo Nano Tech Co ltd
Priority to CN202010425174.8A priority Critical patent/CN111732906A/en
Priority to PCT/CN2020/098076 priority patent/WO2021232534A1/en
Publication of CN111732906A publication Critical patent/CN111732906A/en
Pending legal-status Critical Current

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    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/255—Polyesters
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    • C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
    • C09D101/08—Cellulose derivatives
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    • C09D101/12—Cellulose acetate
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    • C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
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    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
    • C09D109/02—Copolymers with acrylonitrile
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    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C09D127/06—Homopolymers or copolymers of vinyl chloride
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    • C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
    • C09D129/02—Homopolymers or copolymers of unsaturated alcohols
    • C09D129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/10—Homopolymers or copolymers of methacrylic acid esters
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    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
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    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
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    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/245—Vinyl resins, e.g. polyvinyl chloride [PVC]
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    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
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    • C08K2003/0806—Silver
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Abstract

The invention discloses an antiviral and antibacterial functional film and a preparation method thereof, and relates to the technical field of functional films, wherein the functional film comprises a base material, an antiviral and antibacterial coating fixed on the upper surface of the base material, and a low-viscosity organic adhesive layer fixed on the lower surface of the base material; the antiviral and antibacterial coating is obtained by coating a coating liquid containing a nano inorganic/organic composite antiviral and antibacterial treating agent and transparent resin on a base material. The invention adopts reasonable process and reasonable selection of formula raw materials such as transparent resin, etc., thereby effectively mixing the nano inorganic/organic composite antiviral and antibacterial treating agent and the transparent resin to prepare the composite material which can be used for coating liquid, the obtained antiviral and antibacterial coating forms phase separation, the nano inorganic/organic composite antiviral and antibacterial treating agent is gathered on the surface with high concentration, thereby obtaining stronger antiviral and antibacterial effects, and the antiviral and antibacterial properties are uniform and long-acting.

Description

Antiviral and antibacterial functional film and preparation method thereof
Technical Field
The invention relates to the technical field of functional films, in particular to an antiviral and antibacterial functional film and a preparation method thereof.
Background
In recent years, infections caused by various viruses such as new influenza, new coronas and ebola, and bacteria such as klebsiella pneumoniae threaten human lives, and particularly, a large amount of casualties and economic losses occur worldwide due to a large-scale epidemic situation caused by virus-transmitted infections which occur several times in recent ten years, so that a coping strategy is urgently needed worldwide. From such a viewpoint, there is an increasing demand for functional film materials having antibacterial and antiviral properties.
Such a functional membrane material having antibacterial and antiviral properties has been reported. CN105348756B discloses an antibacterial polyester film, a preparation method and an application thereof, and an antibacterial film product is prepared by dispersing nano silver in polyester chips. However, the production of a desired antimicrobial film product requires a complicated process, and the production is complicated, which is inconvenient. In addition, there is a problem that the dispersibility of the nano silver material in the polyester chip is low and the antibacterial property is not uniform.
In addition, although the pathogenicity of microorganisms and viruses can be eliminated by using a chemical bactericide such as hypochlorous acid and hydrogen peroxide, there are problems such as secondary pollution to the environment and irritation to human organs. Further, there is a problem that the effect is not sustained and long-term sterilization cannot be achieved, and once the sterilized article is just sterilized, there is a chance of secondary infection when the second three persons touch it.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides an antiviral and antibacterial functional film and a preparation method thereof.
The invention provides an antiviral and antibacterial functional film, which comprises a base material, an antiviral and antibacterial coating fixed on the upper surface of the base material, and a low-viscosity organic adhesive layer fixed on the lower surface of the base material; the antiviral and antibacterial coating is obtained by coating a coating liquid containing a nano inorganic/organic composite antiviral and antibacterial treating agent and transparent resin on a base material.
Preferably, the nano inorganic/organic composite antiviral and antibacterial treating agent is one or more of a nano silver ion inorganic/organic composite antiviral and antibacterial treating agent, a nano copper ion inorganic/organic composite antiviral and antibacterial treating agent and a nano zinc ion inorganic/organic composite antiviral and antibacterial treating agent; preferably, the nano inorganic/organic composite antiviral and antibacterial treating agent accounts for 0.1-20% of the total weight of the coating liquid.
Preferably, the coating liquid consists of the following components in parts by weight: 0.1-20 parts of nano inorganic/organic composite antiviral and antibacterial treating agent, 2-20 parts of transparent resin, 10-35 parts of cosolvent, 0.02-2 parts of dispersing agent and 20-65 parts of water.
Preferably, the nano inorganic/organic composite antiviral and antibacterial treatment agent is prepared as follows: dissolving organic antibacterial agent in solvent, adding water, adding polymer binder, heating and stirring to obtain emulsion solution, cooling, adding inorganic antibacterial agent, and stirring; preferably, the inorganic antibacterial agent is a nano antibacterial sol, preferably one or more of a nano silver sol, a nano copper sol and a nano zinc sol; preferably, the organic antibacterial agent is an organic sulfur compound, preferably one or more of bistrichloromethane sulfone, allicin, bisbenzoyl disulfide, halogenated pyridylmethylthioether, mercaptopyridine, pentachlorothiophenol, and 2-thiocyanomethylthio-benzothiazole.
Preferably, the transparent resin is one or more of polyvinyl alcohol, polymethyl methacrylate, polyacrylate, cellulose triacetate, polyamide, polyurethane resin, polyethylene, polypropylene, ethylene-propylene copolymer, styrene acrylonitrile, polystyrene, cellulose nitrate, polyvinyl butyral, methyl methacrylate, vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, chloroprene rubber, nitrile rubber, and butadiene rubber;
preferably, the cosolvent is one or more of ethanol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, glycerol, diglycerol, triglycerol, isopropanol, methyl acetate, ethyl acetate, propylene glycol, ethylene glycol monobutyl ether, polyethylene glycol with a polymerization degree of less than 55, and pentaerythritol;
preferably, the dispersant is one or more of a cationic or nonionic dispersant; preferably, the cationic dispersant is one or more of octadecylamine acetate, alkyl quaternary ammonium salt, aminopropylamine dioleate, quaternary ammonium salt and specially modified polyaminoamide phosphate; preferred nonionic dispersants are fatty acid ethylene oxide adducts C17H33COO(CH2CH2O)nH. One or more of polyethylene glycol type polyalcohol and polyethyleneimine derivative.
Preferably, the coating liquid also comprises 0.001-1.0 part of anti-fingerprint agent and 0.005-5.0 parts of antifogging agent.
Preferably, the thickness of the antiviral and antibacterial coating is 0.2-20 μm, preferably 2-15 μm.
Preferably, the base material is any one of BOPP, BOPET, BOPA, PET, PE, PC, TAC, PP, PS, PMMA, TPU, PI, PVB and PVC;
preferably, the low-viscosity organic adhesive layer is an acrylic adhesive layer, an organic silicon pressure-sensitive adhesive, a rubber pressure-sensitive adhesive or a polyurethane pressure-sensitive adhesive layer.
The invention also provides a preparation method of the antiviral and antibacterial functional film, which comprises the following steps:
s1, adding the nano inorganic/organic composite antiviral and antibacterial treating agent and the dispersing agent into a mixing tank, and stirring at the temperature of 60-70 ℃ at the stirring speed of 100-; then adding the cosolvent into a mixing tank, stirring at 60-70 ℃, wherein the stirring speed is 5000-; adding water into the emulsion, and continuing stirring at the stirring speed of 100-; then adjusting the pH value of the emulsion to 2.0-8.0, and stirring uniformly;
s2, adding transparent resin into the uniform emulsion obtained in S1 under stirring, stirring at 40-50 ℃ at the stirring speed of 100-5000r/min for 5-300min, and cooling to room temperature to obtain a stable white emulsion, namely a coating liquid;
and S3, uniformly coating the coating liquid on the surface of the transparent substrate film, and curing. Wherein, the coating process can adopt but not limited to gravure coating, micro-gravure coating, screen coating, spraying and other processes; the above coating layer may be cured using a high-pressure mercury lamp, and the coating layer may be cured by, but not limited to, a thermal curing process, a solvent-based UV curing process, a solvent-based electron beam curing process, a solvent-free UV curing process, and a solvent-free electron beam curing process.
Preferably, in S2, the method further comprises adding an anti-fingerprint agent and an anti-fogging agent to the white emulsion to prepare a coating liquid.
Has the advantages that: the invention provides an antiviral and antibacterial functional film, which is characterized in that a base material is coated with an antiviral and antibacterial coating, and a reasonable process and reasonable selection of formula raw materials such as transparent resin are adopted, so that a nano inorganic/organic composite antiviral and antibacterial treating agent and the transparent resin are effectively mixed to prepare a composite material for coating liquid, the obtained antiviral and antibacterial coating forms phase separation, and the nano inorganic/organic composite antiviral and antibacterial treating agent is gathered on the surface to have high concentration, so that the film has stronger antiviral and antibacterial effects, and is uniform and long-acting in antiviral and antibacterial performance. In addition, the coating also has good scratch resistance, fingerprint resistance, fog resistance, wear resistance, weather resistance and other properties; the low-viscosity organic adhesive layer fixed below the base material can automatically exhaust air, is easy to adhere to the surfaces of metal, wood, plastic and glass, is convenient to use, and has no stimulation and toxicity to human skin. The preparation method is simple, has low cost, and is expected to be used for producing expected antibacterial film products.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
The invention provides an antiviral and antibacterial functional film, which comprises a base material, an antiviral and antibacterial coating fixed on the upper surface of the base material, and a low-viscosity organic adhesive layer fixed on the lower surface of the base material;
wherein the base material is PET; the low-viscosity organic adhesive layer is an acrylic adhesive layer;
the thickness of the antivirus and antibacterial coating is 0.2 μm, and the coating is obtained by coating a coating liquid containing a nano inorganic/organic composite antivirus and antibacterial treating agent and transparent resin on a base material;
specifically, the coating liquid consists of the following components in parts by weight: 20 parts of nano inorganic/organic composite antiviral and antibacterial treating agent, 10 parts of transparent resin, 25 parts of cosolvent, 1 part of dispersing agent, 0.5 part of anti-fingerprint agent, 3.5 parts of antifogging agent and 40 parts of water.
Wherein, the preparation of the nano inorganic/organic composite antiviral and antibacterial treating agent is as follows: dissolving organic antibacterial agent in solvent, adding water, adding polymer binder, heating and stirring to obtain emulsion solution, cooling, adding inorganic antibacterial agent, and stirring; wherein the inorganic antibacterial agent is nano silver sol; the organic antibacterial agent is a mixture of ditrimethyl sulfone and 2-thiocyanomethyl-thio-benzothiazole.
The transparent resin is butadiene rubber; the cosolvent is a mixture of ethanol and methyl acetate; dispersant octadecylamine acetate.
The invention also provides a preparation method of the antiviral and antibacterial functional film, which comprises the following steps:
s1, adding the nano inorganic/organic composite antiviral and antibacterial treating agent and the dispersing agent into a mixing tank, and stirring at 60 ℃ at the stirring speed of 100r/min for 5 min; then adding the cosolvent into a mixing tank, and stirring at 60 ℃ for 5min at a stirring speed of 100r/min to obtain a uniform emulsion; adding water into the emulsion, and continuously stirring at a stirring speed of 100r/min for 5 min; then adjusting the pH value of the emulsion to 2.0, and stirring uniformly;
s2, adding transparent resin into the uniform emulsion obtained in S1 under stirring, stirring at 40 ℃ for 5min at the stirring speed of 100r/min, cooling to room temperature to obtain a stable white emulsion, adding the anti-fingerprint agent and the anti-fogging agent into the white emulsion to prepare a coating liquid, and stirring to obtain the coating liquid;
s3, the coating liquid was uniformly applied to the surface of the transparent base film by gravure coating, and the coating layer was cured using a high-pressure mercury lamp.
Example 2
The invention provides an antiviral and antibacterial functional film, which comprises a base material, an antiviral and antibacterial coating fixed on the upper surface of the base material, and a low-viscosity organic adhesive layer fixed on the lower surface of the base material;
wherein the base material is BOPP; the low-viscosity organic adhesive layer is an organic silicon pressure-sensitive adhesive;
the thickness of the antivirus and antibacterial coating is 20 μm, and the coating is obtained by coating a coating liquid containing a nano inorganic/organic composite antivirus and antibacterial treating agent and transparent resin on a base material;
specifically, the coating liquid consists of the following components in parts by weight: 1.5 parts of nano inorganic/organic composite antiviral and antibacterial treating agent, 20 parts of transparent resin, 35 parts of cosolvent, 2 parts of dispersing agent, 1.0 part of anti-fingerprint agent, 5.0 parts of antifogging agent and 65 parts of water.
Wherein, the preparation of the nano inorganic/organic composite antiviral and antibacterial treating agent is as follows: dissolving organic antibacterial agent in solvent, adding water, adding polymer binder, heating and stirring to obtain emulsion solution, cooling, adding inorganic antibacterial agent, and stirring; wherein the inorganic antibacterial agent is nano copper sol; the organic antibacterial agent is mercaptopyridine.
The transparent resin is a mixture of polyvinyl alcohol and polymethyl methacrylate; the cosolvent is a mixture of ethanol and ethylene glycol monobutyl ether; the dispersant is polyethylene glycol type polyalcohol.
The invention also provides a preparation method of the antiviral and antibacterial functional film, which comprises the following steps:
s1, adding the nano inorganic/organic composite antiviral and antibacterial treating agent and the dispersing agent into a mixing tank, and stirring at 70 ℃ at the stirring speed of 5000r/min for 300 min; adding the cosolvent into a mixing tank, and stirring at 70 ℃ at the stirring speed of 5000r/min for 300min to obtain a uniform emulsion; adding water into the emulsion, and continuously stirring at the stirring speed of 5000r/min for 300 min; then adjusting the pH value of the emulsion to 8.0, and stirring uniformly;
s2, adding transparent resin into the uniform emulsion obtained in S1 under stirring, stirring at 50 ℃, wherein the stirring speed is 5000r/min, the stirring time is 300min, cooling to room temperature to obtain a stable white emulsion, adding the anti-fingerprint agent and the anti-fogging agent into the white emulsion to prepare a coating liquid, and stirring to obtain the coating liquid;
and S3, uniformly coating the coating liquid on the surface of the transparent base material film by adopting a screen coating method, and curing.
Example 3
The invention provides an antiviral and antibacterial functional film, which comprises a base material, an antiviral and antibacterial coating fixed on the upper surface of the base material, and a low-viscosity organic adhesive layer fixed on the lower surface of the base material;
wherein the base material is PMMA; the low-viscosity organic adhesive layer is an organic silicon pressure-sensitive adhesive;
the thickness of the antiviral and antibacterial coating is 5 μm, and the coating is obtained by coating a coating liquid containing a nano inorganic/organic composite antiviral and antibacterial treating agent and transparent resin on a base material;
specifically, the coating liquid consists of the following components in parts by weight: 0.33 part of nano inorganic/organic composite antiviral and antibacterial treating agent, 2 parts of transparent resin, 10 parts of cosolvent, 0.02 part of dispersant, 0.001 part of anti-fingerprint agent, 0.005 part of antifogging agent and 20 parts of water.
Wherein, the preparation of the nano inorganic/organic composite antiviral and antibacterial treating agent is as follows: dissolving organic antibacterial agent in solvent, adding water, adding polymer binder, heating and stirring to obtain emulsion solution, cooling, adding inorganic antibacterial agent, and stirring; wherein, the inorganic antibacterial agent is nano silver sol and nano zinc sol according to the ratio of 3: 1 in a weight ratio; the organic antibacterial agent is 2-thiocyanomethyl-thiobenzothiazole.
The transparent resin is a mixture of cellulose triacetate and vinyl chloride-vinyl acetate copolymer; the cosolvent is a mixture of ethanol, ethyl acetate and polyethylene glycol with polymerization degree below 55; the dispersant is a quaternary ammonium salt.
The invention also provides a preparation method of the antiviral and antibacterial functional film, which comprises the following steps:
s1, adding the nano inorganic/organic composite antiviral and antibacterial treating agent and the dispersing agent into a mixing tank, and stirring at 65 ℃ at the stirring speed of 2000r/min for 120 min; adding the cosolvent into a mixing tank, and stirring at 70 ℃ at a stirring speed of 3500r/min for 180min to obtain a uniform emulsion; adding water into the emulsion, and continuously stirring at the stirring speed of 4000r/min for 30 min; then adjusting the pH value of the emulsion to 5.0, and stirring uniformly;
s2, adding transparent resin into the uniform emulsion obtained in S1 under stirring, stirring at 45 ℃, wherein the stirring speed is 2500r/min, the stirring time is 150min, cooling to room temperature to obtain a stable white emulsion, adding an anti-fingerprint agent and an anti-fogging agent into the white emulsion to prepare a coating liquid, and stirring to obtain the coating liquid;
and S3, uniformly coating the coating liquid on the surface of the transparent substrate film, and curing.
Example 4
The invention provides an antiviral and antibacterial functional film, which comprises a base material, an antiviral and antibacterial coating fixed on the upper surface of the base material, and a low-viscosity organic adhesive layer fixed on the lower surface of the base material;
wherein the base material is PVC; the low-viscosity organic adhesive layer is polyurethane pressure-sensitive adhesive;
the thickness of the antiviral and antibacterial coating is 10 μm, and the coating is obtained by coating a coating liquid containing a nano inorganic/organic composite antiviral and antibacterial treating agent and transparent resin on a base material;
specifically, the coating liquid consists of the following components in parts by weight: 8.5 parts of nano inorganic/organic composite antiviral and antibacterial treating agent, 15 parts of transparent resin, 30 parts of cosolvent, 0.05 part of dispersing agent, 0.01 part of anti-fingerprint agent, 1 part of antifogging agent and 40 parts of water.
Wherein, the preparation of the nano inorganic/organic composite antiviral and antibacterial treating agent is as follows: dissolving organic antibacterial agent in solvent, adding water, adding polymer binder, heating and stirring to obtain emulsion solution, cooling, adding inorganic antibacterial agent, and stirring; the inorganic antibacterial agent is nano silver sol; the organic antibacterial agent is a mixture of bis (trichloromethyl sulfone) and allicin.
The transparent resin is nitrile butadiene rubber; the cosolvent is a mixture of isopropanol and ethylene glycol monobutyl ether; the dispersant is an addition product C of octadecylamine acetate and fatty acid ethylene oxide17H33COO(CH2CH2O)nA mixture of H.
The invention also provides a preparation method of the antiviral and antibacterial functional film, which comprises the following steps:
s1, adding the nano inorganic/organic composite antiviral and antibacterial treating agent and the dispersing agent into a mixing tank, and stirring at 65 ℃ at the stirring speed of 3000r/min for 180 min; adding the cosolvent into a mixing tank, and stirring at 65 ℃ at the stirring speed of 3000r/min for 180min to obtain a uniform emulsion; adding water into the emulsion, and continuously stirring at 3500r/min for 60 min; then adjusting the pH value of the emulsion to 6.0, and stirring uniformly;
s2, adding transparent resin into the uniform emulsion obtained in S1 under stirring, stirring at 45 ℃, wherein the stirring speed is 3500r/min, the stirring time is 180min, cooling to room temperature to obtain a stable white emulsion, adding an anti-fingerprint agent and an anti-fogging agent into the white emulsion to prepare a coating liquid, and stirring to obtain the coating liquid;
and S3, uniformly coating the coating liquid on the surface of the transparent substrate film, and curing.
The antiviral and antibacterial functional films prepared in examples 1 to 4 of the present invention were subjected to performance tests, and the results are shown in Table 1.
1. Determination of antiviral Activity and antibacterial Properties:
A. reference standards and methods: ISO 21702-2019 plastic and other porous surface antiviral activity determination methods, GB/T31402-2015 plastic surface antibacterial property test methods;
B. virus for detection: influenza A virus H1N1(A/PR/8/34) MDCK cells;
bacteria for detection: escherichia coli (ATCC 25922), staphylococcus aureus (ATCC 6538), candida albicans (AS 2.208);
C. the test results are shown in Table 1.
TABLE 1 results of testing antiviral and antibacterial Properties of antiviral and antibacterial functional films in examples 1 to 4
Figure BDA0002498432060000091
Figure BDA0002498432060000101
As can be seen from Table 1, the functional films prepared in examples 1-4 of the present invention have antiviral activity and antibacterial activity of 99.90% or higher, and excellent antiviral and antibacterial properties.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. An antiviral and antibacterial functional film is characterized by comprising a base material, an antiviral and antibacterial coating fixed on the upper surface of the base material, and a low-viscosity organic adhesive layer fixed on the lower surface of the base material; the antiviral and antibacterial coating is obtained by coating a coating liquid containing a nano inorganic/organic composite antiviral and antibacterial treating agent and transparent resin on a base material.
2. The antiviral and antibacterial functional film according to claim 1, wherein the nano inorganic/organic composite antiviral and antibacterial treating agent is one or more of a nano silver ion inorganic/organic composite antiviral and antibacterial treating agent, a nano copper ion inorganic/organic composite antiviral and antibacterial treating agent, and a nano zinc ion inorganic/organic composite antiviral and antibacterial treating agent; preferably, the nano inorganic/organic composite antiviral and antibacterial treating agent accounts for 0.1-20% of the total weight of the coating liquid.
3. The antiviral and antibacterial functional film according to claim 2, wherein the coating liquid is composed of the following components in parts by weight: 0.1-20 parts of nano inorganic/organic composite antiviral and antibacterial treating agent, 2-20 parts of transparent resin, 10-35 parts of cosolvent, 0.02-2 parts of dispersing agent and 20-65 parts of water.
4. The antiviral and antibacterial functional film according to any one of claims 1 to 3, wherein the nano inorganic/organic composite antiviral and antibacterial treatment agent is prepared by: dissolving organic antibacterial agent in solvent, adding water, adding polymer binder, heating and stirring to obtain emulsion solution, cooling, adding inorganic antibacterial agent, and stirring; preferably, the inorganic antibacterial agent is nano antibacterial sol, preferably one or more of nano silver sol, nano copper sol and nano zinc sol; preferably, the organic antibacterial agent is an organic sulfur compound, preferably one or more of bistrichloromethane sulfone, allicin, bisbenzoyl disulfide, halogenated pyridylmethylthioether, mercaptopyridine, pentachlorothiophenol, and 2-thiocyanomethylthio-benzothiazole.
5. The antiviral and antibacterial functional film according to claim 3, wherein the transparent resin is one or more of polyvinyl alcohol, polymethyl methacrylate, polyacrylate, cellulose triacetate, polyamide, polyurethane resin, polyethylene, polypropylene, ethylene-propylene copolymer, styrene acrylonitrile, polystyrene, cellulose nitrate, polyvinyl butyral, methyl methacrylate, vinyl chloride-vinyl acetate copolymer, polyvinyl acetate, chloroprene rubber, nitrile rubber, and butadiene rubber;
preferably, the cosolvent is one or more of ethanol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, glycerol, diglycerol, triglycerol, isopropanol, methyl acetate, ethyl acetate, propylene glycol, ethylene glycol monobutyl ether, polyethylene glycol with a polymerization degree of less than 55, and pentaerythritol;
preferably, the dispersant is one or more of a cationic or nonionic dispersant; preferably, the cationic dispersant is one or more of octadecylamine acetate, alkyl quaternary ammonium salt, aminopropylamine dioleate, quaternary ammonium salt and specially modified polyaminoamide phosphate; preferred nonionic dispersants are fatty acid ethylene oxide adducts C17H33COO(CH2CH2O)nH. One or more of polyethylene glycol type polyalcohol and polyethyleneimine derivative.
6. The antiviral and antibacterial functional film as claimed in claim 3, wherein the coating liquid further comprises 0.001 to 1.0 part of an anti-fingerprint agent and 0.005 to 5.0 parts of an antifogging agent.
7. The film with antiviral and antibacterial functions as claimed in claim 1, wherein the thickness of the antiviral and antibacterial coating layer is 0.2 to 20 μm, preferably 2 to 15 μm.
8. The antiviral and antibacterial functional film as claimed in claim 1, wherein the material of the substrate is any one of BOPP, BOPET, BOPA, PET, PE, PC, TAC, PP, PS, PMMA, TPU, PI, PVB, PVC;
preferably, the low-viscosity organic adhesive layer is an acrylic adhesive layer, an organic silicon pressure-sensitive adhesive, a rubber pressure-sensitive adhesive or a polyurethane pressure-sensitive adhesive layer.
9. A method for preparing an antiviral and antibacterial functional film according to any one of claims 1 to 8, comprising the steps of:
s1, adding the nano inorganic/organic composite antiviral and antibacterial treating agent and the dispersing agent into a mixing tank, and stirring at the temperature of 60-70 ℃ at the stirring speed of 100-; then adding the cosolvent into a mixing tank, stirring at 60-70 ℃, wherein the stirring speed is 5000-; adding water into the emulsion, and continuing stirring at the stirring speed of 100-; then adjusting the pH value of the emulsion to 2.0-8.0, and stirring uniformly;
s2, adding transparent resin into the uniform emulsion obtained in S1 under stirring, stirring at 40-50 ℃ at the stirring speed of 100-5000r/min for 5-300min, and cooling to room temperature to obtain a stable white emulsion, namely a coating liquid;
and S3, uniformly coating the coating liquid on the surface of the transparent substrate film, and curing.
10. The method of preparing an antiviral and antibacterial functional film according to claim 9, wherein S2 further comprises adding an anti-fingerprint agent and an anti-fogging agent to the white emulsion to prepare a coating solution.
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