Transparent antibacterial agent and preparation method thereof

Abstract

The invention relates to the technical field of antibacterial agents, in particular to a transparent antibacterial agent and a preparation method thereof. Comprising the following raw materials in parts by weight: 10-20 parts of silver-loaded particles, 1-5 parts of an organic antibacterial component, 20-30 parts of tourmaline, 1-5 parts of a surfactant, 40-60 parts of a solvent, 0.1-1.0 part of silver salt, 1-3 parts of sodium borohydride, 1-3 parts of a protective agent, 1-5 parts of a penetrant, 0.5-2.5 parts of a cross-linking agent, 10-20 parts of carrier resin and 5-10 parts of polysaccharide colloid. The transparent antibacterial agent is long in timeliness, has excellent sterilization effect and antibacterial performance, is transparent, has wear resistance, can be applied to disinfection and killing in any scene, and can be effectively popularized in the aspects of daily life and medical treatment due to high safety and stability.

Description

Technical Field

[0001] The invention relates to the technical field of antibacterial agents, and in particular to a transparent antibacterial agent and a preparation method thereof. Background Art

[0002] In recent years, with the development of science and technology, people's material living standards have been continuously improved, and people have begun to pay attention to environmental hygiene. In life, problems caused by the growth of bacteria have become common, so people are in urgent need of antibacterial products, which in turn promotes the development of antibacterial agents and their materials.

[0003] Inorganic antimicrobial agents are the focus of current research. Compared with natural and organic antimicrobial agents, they have the advantages of low toxicity, long-lasting effect and heat resistance, and can be widely used in plastics, fibers and other products. The inorganic antimicrobial materials on the market that can meet the food-grade requirements of tableware and other daily products are silver-loaded antimicrobial agents, which have the advantages of high efficiency, low toxicity and sustained release. However, so far, whether it is made into an antibacterial coating or the silver-containing antibacterial tableware that is first prepared by masterbatch and then injection molded, there will be a problem of discoloration, which cannot meet the demand for transparent antibacterial tableware. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a transparent antibacterial agent, which has a long validity period and excellent bactericidal effect, antibacterial performance, transparency and wear resistance. The antibacterial agent can be used for disinfection in any scenario, and due to its high safety and stability, it can be effectively promoted in both daily life and medical aspects.

[0005] The object of the present invention is to provide a method for preparing a transparent antibacterial agent, which has the advantages of simple operation, convenient control, high production efficiency, low production cost, and is suitable for large-scale production. The transparent antibacterial agent prepared has a long time effect, excellent bactericidal effect, antibacterial performance, transparency and wear resistance.

[0006] The objective of the present invention is achieved through the following technical scheme: a transparent antibacterial agent comprises the following raw materials in parts by weight: 10-20 parts of silver-carrying particles, 1-5 parts of organic antibacterial components, 20-30 parts of tourmaline, 1-5 parts of surfactants, 40-60 parts of solvents, 0.1-1.0 parts of silver salts, 1-3 parts of sodium borohydride, 1-3 parts of protective agents, 1-5 parts of penetrants, 0.5-2.5 parts of crosslinking agents, 10-20 parts of carrier resins, and 5-10 parts of polysaccharide colloids.

[0007] The transparent antibacterial agent of the present invention has a long time effect, and has excellent bactericidal effect, antibacterial performance, transparency and wear resistance. The antibacterial agent can be used for disinfection in any scene, and because of its high safety and stability, it can be effectively promoted in both daily life and medical treatment. Among them, the silver-loaded particles used have strong antibacterial activity, can effectively kill bacteria, viruses, fungi and other microorganisms, inhibit their growth and reproduction, and thus help prevent and treat a variety of infectious diseases; the tourmaline is an ultrafine tourmaline powder with a particle size of 8000 mesh, such as the ultrafine tourmaline powder with a particle size of 8000 mesh purchased from Zhuzhong Technology; the protective agent can promote the dispersion of silver salts in the solution, and the penetrant can enhance the fusion of the antibacterial solution and the carrier resin. In addition, the protective agent and penetrant of the present invention can play the role of sodium borohydride to transfer Ag. + Reduced to Ag0. In addition, the protective agent and penetrant, sodium borohydride, and the silver salt must be evenly dissolved in the solvent respectively, and then mixed for reaction. The silver salt cannot be directly added to the sodium borohydride for reaction; and the polysaccharide colloid used has the characteristics of good water absorption and volume expansion up to 10 times when foaming, and has high light transmittance and viscosity. When it is compounded with the organic antibacterial component to form a transparent liquid antibacterial agent, on the one hand, the polysaccharide colloid has the advantages of uniform wet dispersion and all-round attachment and wrapping on the carrier resin, which can promote the full coverage of the organic antibacterial component, and even a small amount of addition can achieve a satisfactory antibacterial, sterilization and antioxidant effect.

[0008] Preferably, the tourmaline needs to be pretreated before use, specifically by the following pretreatment method: the tourmaline is dispersed in N,N-dimethylformamide and centrifuged and washed, and then dried after washing to obtain a dispersion, and then isophorone diisocyanate is dropped into the dispersion to react, and dried to obtain isophorone diisocyanate pretreated tourmaline; the mass ratio of the tourmaline, N,N-dimethylformamide and isophorone diisocyanate is 0.6-1.0:5-10:1-3.

[0009] In the present invention, isophorone diisocyanate is used to modify tourmaline, and -NCO can react with polar groups on the surface of tourmaline. After the reaction, the surface of tourmaline is covered with fatty chain non-polar groups, which reduces the polarity of tourmaline and improves the lipophilicity of tourmaline. The modified tourmaline can be fully and evenly compatible with isophorone diisocyanate, and the isophorone diisocyanate-modified tourmaline can be directly dispersed in a carrier resin by chemical grafting, so that the tourmaline can be firmly and evenly combined with the carrier resin, thereby improving the dispersion uniformity of the tourmaline in the carrier resin.

[0010] Preferably, the organic antibacterial component is a mixture of styrene-maleic acid copolymer, potassium sorbate, and bis(decyl)dimethylammonium chloride in a mass ratio of 0.4-0.8:0.8-1.2:0.6-1.0.

[0011] Preferably, the surfactant is at least one of long-chain fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyoxyethylene alkylamine and polyoxyethylene alkylamide.

[0012] Preferably, the solvent is at least one of water, ethanol and glycerol; the carrier resin is at least one of polypropylene resin, polyethylene resin and polystyrene resin.

[0013] Preferably, the silver salt is at least one of silver carbonate, silver nitrate, silver acetate, silver citrate and silver chloride.

[0014] Preferably, the protective agent is at least one of citric acid and phenyl o-hydroxybenzoate.

[0015] Preferably, the penetrant is at least one of sodium alkylbenzene sulfonate, sulfated castor oil, and hexadecyltrimethylammonium bromide.

[0016] Preferably, the cross-linking agent is at least one of glutaraldehyde, epichlorohydrin, tetraethyl orthosilicate, alcohol glycidyl ether, polyphosphate, and borax.

[0017] Preferably, the polysaccharide colloid is a mixture of peach gum and chitosan in a mass ratio of 0.8-1.2:0.1-0.3.

[0018] The peach gum used in the polysaccharide colloid of the present invention is carboxylated peach gum. Since its molecular chain contains both hydroxyl and carboxyl groups, the peach gum molecules can be cross-linked to form a network gel structure. This network gel structure not only helps to absorb and load the organic antibacterial components, so that the prepared antibacterial agent can better fix the antibacterial components, but also makes it more difficult for heat to be transferred to the organic antibacterial components, making the organic antibacterial components less likely to fail, further improving the antibacterial effect. In addition, chitosan can synergistically enhance the antibacterial effect of the organic antibacterial components together with peach gum due to its good biocompatibility, biodegradability, no toxic side effects, and antibacterial and antiviral properties.

[0019] The present invention also provides a method for preparing a transparent antibacterial agent, comprising the following steps:

[0020] S1. Disperse the silver-carrying particles uniformly in a solvent according to weight, add tourmaline, and stir until uniform to obtain a mixture A for standby use;

[0021] S2. Dissolve the protective agent and the penetrant in ethanol according to weight to obtain a mixed solution, then add the silver salt and sodium borohydride, heat to 50-70° C. and stir for 20-40 minutes to obtain a mixture B for standby use;

[0022] S3, mixing the organic antibacterial component, the carrier resin and the polysaccharide colloid according to parts by weight, heating to 55-65° C., and then stirring and emulsifying for 0.5-1 h to obtain a mixture C for standby use;

[0023] S4. Add the surfactant, cross-linking agent, mixture B and mixture C into mixture A and mix them evenly. Raise the temperature to 200-250° C. until the system is completely emulsified and forms a transparent glue solution, thereby obtaining a transparent antibacterial agent.

[0024] The beneficial effects of the present invention are: the transparent antibacterial agent of the present invention has a long time effect, and has excellent bactericidal effect, antibacterial performance, transparency and wear resistance. The antibacterial agent can be used for disinfection in any scenario, and due to its high safety and stability, it can be effectively promoted in both daily life and medical treatment.

[0025] The preparation method of the transparent antibacterial agent of the present invention is simple to operate, convenient to control, high in production efficiency, low in production cost, and suitable for large-scale production. The prepared transparent antibacterial agent has long effectiveness, excellent bactericidal effect, antibacterial performance, transparency and wear resistance. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments, and the contents mentioned in the implementation modes are not intended to limit the present invention.

[0027] Example 1

[0028] A transparent antibacterial agent comprises the following raw materials in parts by weight: 10 parts of silver-carrying particles, 1 part of an organic antibacterial component, 20 parts of tourmaline, 1 part of a surfactant, 40 parts of a solvent, 0.1 part of a silver salt, 1 part of sodium borohydride, 1 part of a protective agent, 1 part of a penetrant, 0.5 parts of a cross-linking agent, 10 parts of a carrier resin, and 5 parts of a polysaccharide colloid.

[0029] The tourmaline needs to be pretreated before use, and the pretreatment is specifically carried out by the following method: the tourmaline is dispersed in N,N-dimethylformamide and centrifuged and washed, and then dried after washing to obtain a dispersion liquid, and then isophorone diisocyanate is dropped into the dispersion liquid for reaction, and dried to obtain isophorone diisocyanate pretreated tourmaline; the mass ratio of the tourmaline, N,N-dimethylformamide and isophorone diisocyanate is 0.6:5:1.

[0030] The organic antibacterial component is a mixture of styrene-maleic acid copolymer, potassium sorbate and bis(decyl)dimethylammonium chloride in a mass ratio of 0.4:0.8:0.6.

[0031] The surfactant is long-chain fatty alcohol polyoxyethylene ether.

[0032] The solvent is water; the carrier resin is polypropylene resin.

[0033] The silver salt is silver carbonate. The protective agent is phenyl o-hydroxybenzoate.

[0034] The penetrant is sodium alkylbenzene sulfonate. The cross-linking agent is glutaraldehyde.

[0035] The polysaccharide colloid is a mixture of peach gum and chitosan in a mass ratio of 0.8:0.1.

[0036] A method for preparing a transparent antibacterial agent comprises the following steps:

[0037] S1. Disperse the silver-carrying particles uniformly in a solvent according to weight, add tourmaline, and stir until uniform to obtain a mixture A for standby use;

[0038] S2. Dissolve the protective agent and the penetrant in ethanol according to weight to obtain a mixed solution, then add the silver salt and sodium borohydride, heat to 50° C. and stir for 20 min to obtain a mixture B for standby use;

[0039] S3, mixing the organic antibacterial component, the carrier resin and the polysaccharide colloid according to parts by weight, heating to 55° C. and stirring and emulsifying for 0.5 h to obtain a mixture C for standby use;

[0040] S4. Add the surfactant, cross-linking agent, mixture B and mixture C into mixture A and mix them evenly. Raise the temperature to 200° C. and wait until the system is completely emulsified and forms a transparent adhesive solution to obtain a transparent antibacterial agent.

[0041] Example 2

[0042] A transparent antibacterial agent comprises the following raw materials in parts by weight: 15 parts of silver-carrying particles, 3 parts of organic antibacterial components, 25 parts of tourmaline, 3 parts of surfactants, 50 parts of solvents, 0.5 parts of silver salts, 2 parts of sodium borohydride, 2 parts of protective agents, 3 parts of penetrants, 1.0 parts of cross-linking agents, 15 parts of carrier resins, and 8 parts of polysaccharide colloids.

[0043] The tourmaline needs to be pretreated before use, and the pretreatment is specifically carried out by the following method: the tourmaline is dispersed in N,N-dimethylformamide and centrifuged and washed, and then dried after washing to obtain a dispersion liquid, and then isophorone diisocyanate is dropped into the dispersion liquid for reaction, and dried to obtain isophorone diisocyanate pretreated tourmaline; the mass ratio of the tourmaline, N,N-dimethylformamide and isophorone diisocyanate is 0.8:8:2.

[0044] The organic antibacterial component is a mixture of styrene-maleic acid copolymer, potassium sorbate and bis(decyl)dimethylammonium chloride in a mass ratio of 0.6:1.0:0.8.

[0045] The surfactant is composed of long-chain fatty alcohol polyoxyethylene ether and polyoxyethylene alkylamide in a ratio of 1:1.

[0046] The solvent is a mixture of water, ethanol and glycerol in a mass ratio of 0.7:1.0:0.8; the carrier resin is a mixture of polypropylene resin, polyethylene resin and polystyrene resin in a mass ratio of 0.9:1.0:0.7.

[0047] The silver salt is a mixture of silver nitrate, silver citrate and silver chloride in a mass ratio of 0.9:1.0:0.7.

[0048] The protective agent is phenyl o-hydroxybenzoate.

[0049] The penetrant is a mixture of sodium alkylbenzene sulfonate, sulfated castor oil and hexadecyltrimethylammonium bromide in a mass ratio of 0.5:0.7:0.8.

[0050] The crosslinking agent is a mixture of ethyl orthosilicate, alcohol glycidyl ether and borax in a mass ratio of 0.5:0.7:0.8.

[0051] The polysaccharide colloid is a mixture of peach gum and chitosan in a mass ratio of 1.0:0.2.

[0052] A method for preparing a transparent antibacterial agent comprises the following steps:

[0053] S1. Disperse the silver-carrying particles uniformly in a solvent according to weight, add tourmaline, and stir until uniform to obtain a mixture A for standby use;

[0054] S2. Dissolve the protective agent and the penetrant in ethanol according to weight to obtain a mixed solution, then add silver salt and sodium borohydride, heat to 60° C. and stir for 30 minutes to obtain a mixture B for standby use;

[0055] S3, mixing the organic antibacterial component, the carrier resin and the polysaccharide colloid according to parts by weight, heating to 60° C. and stirring and emulsifying for 0.8 h to obtain a mixture C for standby use;

[0056] S4. Add the surfactant, cross-linking agent, mixture B and mixture C into mixture A and mix evenly. Raise the temperature to 230° C. until the system is completely emulsified and forms a transparent adhesive solution to obtain a transparent antibacterial agent.

[0057] Example 3

[0058] A transparent antibacterial agent comprises the following raw materials in parts by weight: 20 parts of silver-carrying particles, 5 parts of organic antibacterial components, 30 parts of tourmaline, 5 parts of surfactant, 60 parts of solvent, 1.0 part of silver salt, 3 parts of sodium borohydride, 3 parts of protective agent, 5 parts of penetrant, 2.5 parts of cross-linking agent, 20 parts of carrier resin and 10 parts of polysaccharide colloid.

[0059] The tourmaline needs to be pretreated before use, and the pretreatment is specifically carried out by the following method: the tourmaline is dispersed in N,N-dimethylformamide and centrifuged and washed, and then dried after washing to obtain a dispersion liquid, and then isophorone diisocyanate is dropped into the dispersion liquid for reaction, and dried to obtain isophorone diisocyanate pretreated tourmaline; the mass ratio of the amount of the tourmaline, N,N-dimethylformamide and isophorone diisocyanate used is 1.0:10:3.

[0060] The organic antibacterial component is a mixture of styrene-maleic acid copolymer, potassium sorbate and bis(decyl)dimethylammonium chloride in a mass ratio of 0.8:1.2:1.0.

[0061] The surfactant is alkylphenol polyoxyethylene ether.

[0062] The solvent is ethanol; the carrier resin is polypropylene resin.

[0063] The silver salt is silver nitrate. The protective agent is citric acid.

[0064] The penetrant is hexadecyltrimethylammonium bromide. The cross-linking agent is tetraethyl orthosilicate.

[0065] The polysaccharide colloid is a mixture of peach gum and chitosan in a mass ratio of 1.2:0.3.

[0066] A method for preparing a transparent antibacterial agent comprises the following steps:

[0067] S1. Disperse the silver-carrying particles uniformly in a solvent according to weight, add tourmaline, and stir until uniform to obtain a mixture A for standby use;

[0068] S2. Dissolve the protective agent and the penetrant in ethanol according to weight to obtain a mixed solution, then add the silver salt and sodium borohydride, heat to 70° C. and stir for 40 min to obtain a mixture B for standby use;

[0069] S3, mixing the organic antibacterial component, the carrier resin and the polysaccharide colloid according to parts by weight, heating to 65° C. and stirring and emulsifying for 1 hour to obtain a mixture C for standby use;

[0070] S4. Add the surfactant, cross-linking agent, mixture B and mixture C into mixture A and mix evenly. Raise the temperature to 250° C. until the system is completely emulsified and forms a transparent adhesive solution, thereby obtaining a transparent antibacterial agent.

[0071] Example 4

[0072] A transparent antibacterial agent comprises the following raw materials in parts by weight: 15 parts of silver-carrying particles, 3 parts of organic antibacterial components, 25 parts of tourmaline, 5 parts of surfactant, 40 parts of solvent, 0.5 parts of silver salt, 2 parts of sodium borohydride, 3 parts of protective agent, 1 part of penetrant, 2.5 parts of cross-linking agent, 20 parts of carrier resin and 8 parts of polysaccharide colloid.

[0073] The tourmaline needs to be pretreated before use, and the pretreatment is specifically carried out by the following method: the tourmaline is dispersed in N,N-dimethylformamide and centrifuged and washed, and then dried after washing to obtain a dispersion liquid, and then isophorone diisocyanate is dropped into the dispersion liquid for reaction, and dried to obtain isophorone diisocyanate pretreated tourmaline; the mass ratio of the tourmaline, N,N-dimethylformamide and isophorone diisocyanate is 0.8:8:2.

[0074] The organic antibacterial component is a mixture of styrene-maleic acid copolymer, potassium sorbate and bis(decyl)dimethylammonium chloride in a mass ratio of 0.8:1.2:1.0.

[0075] The surfactant is polyoxyethylene fatty acid ester.

[0076] The solvent is water; the carrier resin is polypropylene resin.

[0077] The silver salt is silver citrate.

[0078] The protective agent is phenyl o-hydroxybenzoate.

[0079] The penetrant is hexadecyltrimethylammonium bromide.

[0080] The crosslinking agent is tetraethyl orthosilicate.

[0081] The polysaccharide colloid is a mixture of peach gum and chitosan in a mass ratio of 1.2:0.3.

[0082] A method for preparing a transparent antibacterial agent comprises the following steps:

[0083] S1. Disperse the silver-carrying particles uniformly in a solvent according to weight, add tourmaline, and stir until uniform to obtain a mixture A for standby use;

[0084] S2. Dissolve the protective agent and the penetrant in ethanol according to weight to obtain a mixed solution, then add the silver salt and sodium borohydride, heat to 50° C. and stir for 30 min to obtain a mixture B for standby use;

[0085] S3, mixing the organic antibacterial component, the carrier resin and the polysaccharide colloid according to parts by weight, heating to 65° C. and stirring and emulsifying for 0.5 h to obtain a mixture C for standby use;

[0086] S4. Add the surfactant, cross-linking agent, mixture B and mixture C into mixture A and mix evenly. Raise the temperature to 250° C. until the system is completely emulsified and forms a transparent adhesive solution, thereby obtaining a transparent antibacterial agent.

[0087] Example 5

[0088] A transparent antibacterial agent comprises the following raw materials in parts by weight: 20 parts of silver-carrying particles, 5 parts of organic antibacterial components, 30 parts of tourmaline, 5 parts of surfactant, 60 parts of solvent, 1.0 part of silver salt, 3 parts of sodium borohydride, 3 parts of protective agent, 5 parts of penetrant, 2.5 parts of cross-linking agent, 20 parts of carrier resin and 10 parts of polysaccharide colloid.

[0089] The tourmaline needs to be pretreated before use, and the pretreatment is specifically carried out by the following method: the tourmaline is dispersed in N,N-dimethylformamide and centrifuged and washed, and then dried after washing to obtain a dispersion liquid, and then isophorone diisocyanate is dropped into the dispersion liquid for reaction, and dried to obtain isophorone diisocyanate pretreated tourmaline; the mass ratio of the tourmaline, N,N-dimethylformamide and isophorone diisocyanate is 0.8:8:2.

[0090] The organic antibacterial component is a mixture of styrene-maleic acid copolymer, potassium sorbate and bis(decyl)dimethylammonium chloride in a mass ratio of 0.8:1.2:1.0.

[0091] The surfactant is polyoxyethylene fatty acid ester.

[0092] The solvent is water; the carrier resin is polypropylene resin.

[0093] The silver salt is silver citrate.

[0094] The protective agent is phenyl o-hydroxybenzoate.

[0095] The penetrant is hexadecyltrimethylammonium bromide.

[0096] The crosslinking agent is tetraethyl orthosilicate.

[0097] The polysaccharide colloid is a mixture of peach gum and chitosan in a mass ratio of 1.2:0.3.

[0098] A method for preparing a transparent antibacterial agent comprises the following steps:

[0099] S1. Disperse the silver-carrying particles uniformly in a solvent according to weight, add tourmaline, and stir until uniform to obtain a mixture A for standby use;

[0100] S2. Dissolve the protective agent and the penetrant in ethanol according to weight to obtain a mixed solution, then add the silver salt and sodium borohydride, heat to 50° C. and stir for 30 min to obtain a mixture B for standby use;

[0101] S3, mixing the organic antibacterial component, the carrier resin and the polysaccharide colloid according to parts by weight, heating to 65° C. and stirring and emulsifying for 0.5 h to obtain a mixture C for standby use;

[0102] S4. Add the surfactant, cross-linking agent, mixture B and mixture C into mixture A and mix evenly. Raise the temperature to 250° C. until the system is completely emulsified and forms a transparent adhesive solution, thereby obtaining a transparent antibacterial agent.

[0103] Comparative Example 1

[0104] The difference between this comparative example and the above-mentioned Example 2 is that the tourmaline used in the raw material of the transparent antibacterial agent of this comparative example is not pretreated, and the other raw materials are mixed according to the proportions of Example 2. The rest of the contents of this comparative example are the same as those of Example 2, and will not be repeated here.

[0105] Comparative Example 2

[0106] The difference between this comparative example and the above-mentioned Example 2 is that no polysaccharide colloid is added to the raw materials of the transparent antibacterial agent of this comparative example, and the remaining raw materials are mixed according to the proportions of Example 2. The rest of the contents of this comparative example are the same as those of Example 2, and will not be repeated here.

[0107] 1. The transparent antibacterial agent samples prepared in Example 2 and Comparative Example 1-2 with the same dosage were commissioned to the "Guangdong Microbiological Analysis and Testing Center" to conduct bactericidal performance testing in accordance with the national standard "GB15979-2002 Appendix C5". The results are shown in Table 1 below:

[0108] Table 1

[0109]

[0110] It can be seen from Example 2 that the transparent antibacterial agent prepared in the present invention has good antibacterial properties and sustained release properties.

[0111] 2. The transparent antibacterial agent samples prepared in Example 2 and Comparative Examples 1-2 with the same dosage were tested for transparency, with specific reference to the standard GB / T2410-2008 for determination of light transmittance and haze of transparent plastics, and the transparency test was performed. The results are shown in Table 2 below:

[0112] project color Haze(%) Light transmittance (%) Example 2 transparent 3.1 97.8 Comparative Example 1 transparent 3.6 94.3 Comparative Example 2 transparent 3.7 93.5

[0113] It can be seen from the above tests that the transparent antibacterial agent prepared by the present invention has good antibacterial properties, is not easy to mildew for a long time, and produces highly transparent antibacterial plastic products.

[0114] From the comparison between Example 2 and Comparative Examples 1-2, it can be seen that under the same conditions, the addition of polysaccharide colloid and the use of pretreated tourmaline in the formula make the prepared transparent antibacterial agent have better antibacterial properties and transparency, and have broad market prospects and application value.

[0115] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.

Claims

1. A transparent antibacterial agent, characterized in that: The invention comprises the following raw materials in parts by weight: 10-20 parts of silver-carrying particles, 1-5 parts of organic antibacterial components, 20-30 parts of tourmaline, 1-5 parts of surfactants, 40-60 parts of solvents, 0.1-1.0 parts of silver salts, 1-3 parts of sodium borohydride, 1-3 parts of protective agents, 1-5 parts of penetrants, 0.5-2.5 parts of cross-linking agents, 10-20 parts of carrier resins and 5-10 parts of polysaccharide colloids.

2. A transparent antibacterial agent according to claim 1, characterized in that: The organic antibacterial component is a mixture of styrene-maleic acid copolymer, potassium sorbate and bis(decyl)dimethylammonium chloride in a mass ratio of 0.4-0.8:0.8-1.2:0.6-1.

0.

3. A transparent antibacterial agent according to claim 1, characterized in that: The surfactant is at least one of long-chain fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, polyoxyethylene alkylamine and polyoxyethylene alkylamide.

4. A transparent antibacterial agent according to claim 1, characterized in that: The solvent is at least one of water, ethanol and glycerol; the carrier resin is at least one of polypropylene resin, polyethylene resin and polystyrene resin.

5. A transparent antibacterial agent according to claim 1, characterized in that: The silver salt is at least one of silver carbonate, silver nitrate, silver acetate, silver citrate and silver chloride.

6. A transparent antibacterial agent according to claim 1, characterized in that: The protective agent is at least one of citric acid and phenyl o-hydroxybenzoate.

7. A transparent antibacterial agent according to claim 1, characterized in that: The penetrant is at least one of sodium alkylbenzene sulfonate, sulfated castor oil, and hexadecyltrimethylammonium bromide.

8. A transparent antibacterial agent according to claim 1, characterized in that: The cross-linking agent is at least one of glutaraldehyde, epichlorohydrin, tetraethyl orthosilicate, alcohol glycidyl ether, polyphosphate and borax.

9. A transparent antibacterial agent according to claim 1, characterized in that: The polysaccharide colloid is a mixture of peach gum and chitosan in a mass ratio of 0.8-1.2:0.1-0.

3.

10. A method for preparing a transparent antibacterial agent according to any one of claims 1 to 9, characterized in that: The steps include: S1. Disperse the silver-carrying particles uniformly in a solvent according to weight, add tourmaline, and stir until uniform to obtain a mixture A for standby use; S2. Dissolve the protective agent and the penetrant in ethanol according to weight to obtain a mixed solution, then add the silver salt and sodium borohydride, heat to 50-70° C. and stir for 20-40 minutes to obtain a mixture B for standby use; S3, mixing the organic antibacterial component, the carrier resin and the polysaccharide colloid according to parts by weight, heating to 55-65° C., and then stirring and emulsifying for 0.5-1 h to obtain a mixture C for standby use; S4. Add the surfactant, cross-linking agent, mixture B and mixture C into mixture A and mix them evenly. Raise the temperature to 200-250° C. until the system is completely emulsified and forms a transparent glue solution, thereby obtaining a transparent antibacterial agent.

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