CN115093736A - Antibacterial and fingerprint-resistant liquid for touch screen panel and preparation method thereof - Google Patents
Antibacterial and fingerprint-resistant liquid for touch screen panel and preparation method thereof Download PDFInfo
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Abstract
The application relates to the technical field of glass coatings, and particularly discloses an antibacterial and fingerprint-resistant liquid for a touch screen panel and a preparation method of the antibacterial and fingerprint-resistant liquid. The antibacterial and fingerprint-resistant liquid for the touch screen panel comprises the following raw materials: 0.3-0.5 part of perfluoropolyether, 99.5-99.7 parts of methyl nonafluorobutyl ether and 1-3 parts of Ag-Zn composite antibacterial material; the Ag-Zn composite antibacterial material is prepared by loading silver ions and zinc ions on a silicon dioxide carrier; the Ag-Zn composite antibacterial material is prepared, wherein the concentration of silver ions is 8 multiplied by 10 < -5 > to 10 multiplied by 10 < -5 > mol/L, and the concentration of zinc ions is 0.7 to 0.9 mol/L; the preparation method comprises the following steps: mixing all the materials. The fingerprint-resistant liquid has the fingerprint residue rate as low as 12.52-6.45%, the 3d antibacterial rate of 99.85-99.99%, the 30d antibacterial rate of 99.17-99.57%, and excellent fingerprint-resistant performance and antibacterial performance.
Description
Technical Field
The application relates to the technical field of glass coatings, in particular to an antibacterial and fingerprint-resistant liquid for a touch screen panel and a preparation method thereof.
Background
In recent years, most electronic products such as smart phones and tablet computers have achieved a touch screen function, and users can achieve various operations by only lightly touching icons or characters on a display screen with fingers, so that human-computer interaction is more straightforward, and great convenience is brought to the users through the technology.
Just because of the use characteristics of the touch screen, the touch screen frequently makes touch contact with fingers, and the following problems exist in the use process: the glass panel on the surface of the touch screen can be stuck with various fingerprint traces or be stained with oil stains in frequent touch, so that the attractiveness and light transmission are affected, and the display effect is poor. In order to improve the problem, anti-fingerprint liquid is coated on the glass panel of the touch screen to form an anti-fingerprint coating.
In addition, people have a high use rate of electronic products, the skin of a human body frequently contacts the touch screen, a large amount of bacteria can be bred on the surface of the touch screen, and the touch screen has potential threats to the health of the human body, so that how to enable the touch screen panel to achieve the effects of fingerprint resistance and bacteria resistance has very important significance.
Disclosure of Invention
In order to improve the antibacterial effect of the anti-fingerprint liquid, the application provides the anti-fingerprint liquid for the touch screen panel and a preparation method thereof.
In a first aspect, the present application provides an antibacterial and anti-fingerprint liquid for a touch screen panel, which adopts the following technical scheme: the antibacterial and fingerprint-resistant liquid for the touch screen panel comprises the following raw materials in parts by weight: 0.3-0.5 part of perfluoropolyether, 99.5-99.7 parts of methyl nonafluorobutyl ether and 1-3 parts of Ag-Zn composite antibacterial material;
the Ag-Zn composite antibacterial material is prepared by loading silver ions and zinc ions on a silicon dioxide carrier;
the silver ion concentration for preparing the Ag-Zn composite antibacterial material is 8 multiplied by 10 -5 -10×10 -5 mol/L and zinc ion concentration of 0.7-0.9 mol/L.
By adopting the technical scheme, fluorine atoms in the perfluoropolyether have larger electronegativity, intermolecular attraction is small, and the perfluoropolyether has lower surface tension, and the molecular chain is softer, so that the perfluoropolyether has low friction coefficient, and according to the lotus leaf principle, a nano molecular layer is formed on the surface of the touch screen, the surface tension of the screen is reduced, the screen has hydrophobic and oleophobic properties, the adhesion force of the glass substrate to fingerprints is weakened, and the fingerprint prevention effect is achieved.
The novel Ag-Zn composite antibacterial material prepared by loading silicon dioxide by utilizing silver ions and zinc ions has a fluffy structure, small particle size and uniform dispersion, and has good adsorption performance due to the fact that the surface of the novel Ag-Zn composite antibacterial material contains a large number of compact micropores and the specific surface area is large; the silver element and the zinc element are loaded in the silicon dioxide carrier in the form of silver oxide and zinc oxide respectively and are mainly loaded on the surface of the material, so that the excellent antibacterial effect is achieved. In addition, the most critical factor influencing the antibacterial performance of the Ag-Zn composite antibacterial material is the concentration of silver ions, and the silver ion and zinc ion concentrations for preparing the Ag-Zn composite antibacterial material are limited, so that the amounts of the silver ions and the zinc ions loaded on the silicon dioxide carrier are limited, the antibacterial performance of the Ag-Zn composite antibacterial material is further improved, and the antibacterial performance of the anti-fingerprint coating is improved.
Preferably, the preparation method of the Ag-Zn composite antibacterial material comprises the following steps:
1) uniformly mixing a silver nitrate aqueous solution and a zinc sulfate aqueous solution, and adjusting the pH value of the mixed solution to 9-11 to obtain a mixed solution;
2) adding a silicon dioxide carrier into the mixed solution obtained in the step 1), uniformly mixing, centrifuging to obtain a precipitate, reducing the precipitate in the shade overnight under ultraviolet rays for 1h, and grinding into powder to obtain the Ag-Zn composite antibacterial material; wherein the proportion of the silicon dioxide carrier to the mixed solution is that 1g of the silicon dioxide carrier corresponds to 400-500ml of the mixed solution.
By adopting the technical scheme, the silver ion and zinc ion are loaded under the alkaline condition, the loading rate of the silver ion can be improved, and when the pH value of the loading environment is 9-11, the loading effect of the silver ion is relatively better, thereby being beneficial to improving the antibacterial effect.
Preferably, the pH of the mixed solution is adjusted to 10 in step 1).
By adopting the technical scheme, when the pH value of the loading environment is increased from 9 to 10, the loading value of the silver ions is further increased, when the pH value is continuously increased, the loading rate of the silver ions is reduced, the pH value of the loading environment is limited to 10, the best silver ion loading effect is achieved, and the antibacterial performance is improved.
Preferably, cyclodextrin is wrapped outside the Ag-Zn composite antibacterial material.
The Ag-Zn composite antibacterial material has small grain diameter and is easy to agglomerate, and the binding force between the inorganic material and the methyl nonafluorobutyl ether is poor. By adopting the technical scheme, the Ag-Zn composite antibacterial material is wrapped with cyclodextrin, the cyclodextrin improves the surface wettability of the Ag-Zn composite antibacterial material and reduces the agglomeration probability of the Ag-Zn composite antibacterial material; moreover, the inorganic and organic connection between the Ag-Zn composite antibacterial material and the methyl nonafluorobutyl ether can be converted into organic and organic connection, so that the bonding strength between the Ag-Zn composite antibacterial material and the methyl nonafluorobutyl ether is improved; finally, the cyclodextrin can delay the release of silver ions and zinc ions and prolong the long-acting property of the antibacterial function of the Ag-Zn composite antibacterial material.
Preferably, the Ag-Zn composite antibacterial material is subjected to surface treatment with an adamantane derivative before being coated with cyclodextrin.
Preferably, the preparation method of the Ag-Zn composite antibacterial material coated with cyclodextrin comprises the following steps:
1) surface treatment of adamantane derivative:
dissolving 4-6 parts of 4-dimethylaminopyridine and 4-6 parts of Ag-Zn composite antibacterial material in trichloromethane, then adding 4-6 parts of adamantane formyl chloride, uniformly mixing, adding 4-6 parts of dehydrating agent, reacting for 48 hours at 60 ℃, then washing with trichloromethane solution, dichloromethane solution, hydrochloric acid and absolute ethyl alcohol distilled water in sequence, finally centrifuging and drying to obtain the adamantane-Ag-Zn composite antibacterial material;
2) encapsulating cyclodextrins
Dissolving cyclodextrin in water, dissolving adamantane-Ag-Zn composite antibacterial material in ethanol, stirring and mixing the two at 20-25 ℃ for 1h, carrying out inclusion to obtain an inclusion compound, and then carrying out freeze drying on the inclusion compound to obtain the Ag-Zn composite antibacterial material coated with cyclodextrin.
The cyclodextrin is a cavity structure with hydrophilic outer edge and hydrophobic inner cavity, the inner cavity and the outer hydrophilic characteristic of the cyclodextrin can form an inclusion compound and a molecular assembly system with a plurality of organic and inorganic molecules according to Van der Waals force, hydrophobic interaction force, matching effect among host and guest molecules and the like, the cyclodextrin is used as a host envelope guest Ag-Zn composite antibacterial material, by adopting the technical scheme, the adamantane derivative is subjected to surface treatment, an adamantane hydrophobic group is introduced on the surface of the Ag-Zn composite antibacterial material, so that guest molecules have host and guest recognition capability, a foundation is laid for guest selection of the cyclodextrin, the wrapping effect of the cyclodextrin on the Ag-Zn composite antibacterial material is improved, the agglomeration among the Ag-Zn composite antibacterial material is further reduced, the bonding strength between the Ag-Zn composite antibacterial material and methyl nonafluorobutyl ether is improved, thereby improving the antibacterial effect.
Preferably, it further comprises 0.2 to 0.4 parts by weight of an acrylic varnish.
By adopting the technical scheme, the acrylic varnish and the perfluoropolyether are mixed for use, so that the contact angle of surface water and hexadecane can be changed, and the fingerprint residual rate is further reduced.
In a second aspect, the present application provides a method for preparing an antibacterial and fingerprint-resistant liquid for a touch screen panel, which adopts the following technical scheme:
a preparation method of antibacterial and fingerprint-resistant liquid for a touch screen panel comprises the following steps:
and uniformly mixing all the raw materials to obtain the antibacterial and fingerprint-resistant liquid for the touch screen panel.
By adopting the technical scheme, the preparation method is simple and easy to operate, has no special requirements on production equipment, and is suitable for industrial production.
In summary, the present application has the following beneficial effects:
according to the application, the antibacterial material is prepared by loading silver ions and zinc ions on silicon dioxide, the concentration of the silver ions and the concentration of the zinc ions are limited, the antibacterial material is added into the fingerprint-proof liquid compounded by perfluoropolyether and methyl nonafluorobutyl ether, the fingerprint residual rate is as low as 12.52-6.45%, the 3d antibacterial rate can reach 99.85-99.99%, the 30d antibacterial rate can reach 99.17-99.57%, and the fingerprint-proof performance and the antibacterial performance are both excellent.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation examples of starting materials and intermediates
Raw materials
Perfluoropolyether, type DAIKIN L-200;
methyl nonafluorobutyl ether, analytically pure;
the silver nitrate water solution is analytically pure;
the zinc sulfate aqueous solution is heptahydrate zinc sulfate aqueous solution and is analytically pure;
the silica carrier is analytically pure;
ammonia water is analytically pure;
the cyclodextrin is beta-cyclodextrin;
the adamantane derivative is adamantane formyl chloride.
Preparation example
Preparation example I-1
An Ag-Zn composite antibacterial material, the preparation method comprises the following steps:
1) mixing silver nitrate aqueous solution and zinc sulfate aqueous solution uniformly, adjusting pH value of the mixed solution to 9 with ammonia water to obtain mixed solution, wherein the concentration of silver ions in the mixed solution is 8 multiplied by 10 -5 The mol/L and the zinc ion concentration are 0.9 mol/L;
2) adding a silicon dioxide carrier into the mixed solution obtained in the step 1), oscillating for 1h by using an oscillator, uniformly mixing, centrifuging at the rotating speed of 3500r/mim for 15min, centrifuging to obtain a precipitate, reducing the precipitate in the shade overnight under ultraviolet rays for 1h, and grinding into powder to obtain the Ag-Zn composite antibacterial material; wherein the proportion of the silicon dioxide carrier to the mixed solution is that 1g of the silicon dioxide carrier corresponds to 400ml of the mixed solution.
Preparation example I-2
Unlike preparation example I-1, in preparation example I-2, the silver ion concentration was 9X 10 -5 mol/L。
Preparation example I-3
Unlike preparation I-1, preparation I-3 had a silver ion concentration of 10X 10 -5 mol/L。
Preparation example I-4
Unlike preparation example I-2, in preparation example I-4, the zinc ion concentration was 0.8 mol/L.
Preparation examples I-5
Unlike preparation example I-2, in preparation example I-5, the zinc ion concentration was 0.7 mol/L.
Preparation example I-6
Unlike preparation example I-4, in preparation example I-6, the pH of the mixed solution was adjusted to 10.
Preparation examples I to 7
Unlike preparation example I-4, in preparation example I-7, the pH of the mixed solution was adjusted to 11.
Preparation example II-1
An Ag-Zn composite antibacterial material coated with cyclodextrin is prepared by the following steps:
dissolving beta-cyclodextrin in water, wherein the ratio of the beta-cyclodextrin to the water is that 1g of beta-cyclodextrin corresponds to 10ml of distilled water, dissolving the Ag-Zn composite antibacterial material obtained in the preparation example I-6 in absolute ethyl alcohol, and the ratio of the Ag-Zn composite antibacterial material to the absolute ethyl alcohol is that 1g of the Ag-Zn composite antibacterial material corresponds to 3ml of the absolute ethyl alcohol; and then stirring and mixing the two at 20 ℃ for 1h, carrying out inclusion to obtain an inclusion compound, and then carrying out freeze drying on the inclusion compound to obtain the Ag-Zn composite antibacterial material wrapped with cyclodextrin.
Preparation example II-2
An Ag-Zn composite antibacterial material coated with cyclodextrin is prepared by the following steps:
1) surface treatment of adamantane derivatives:
dissolving 4-dimethylaminopyridine 4g and Ag-Zn composite antibacterial material obtained in preparation example I-6 in chloroform, adding adamantane formyl chloride 4g, mixing uniformly, adding dehydrating agent DCC 6g, reacting for 48h at 60 ℃, washing and filtering with chloroform for 2 times, washing and filtering with dichloromethane solution for 2 times, washing with HCl 1mol/L for 1 time, washing with absolute ethyl alcohol for 3 times, washing with distilled water for 3 times, centrifuging, and drying to obtain adamantane-Ag-Zn composite antibacterial material;
2) encapsulating cyclodextrins
Dissolving beta-cyclodextrin in water, wherein the ratio of the beta-cyclodextrin to the water is that 1g of the beta-cyclodextrin corresponds to 10ml of distilled water, dissolving the Ag-Zn composite antibacterial material obtained in the step 1) in absolute ethyl alcohol, and the ratio of the Ag-Zn composite antibacterial material to the absolute ethyl alcohol is that 1g of the Ag-Zn composite antibacterial material corresponds to 3ml of the absolute ethyl alcohol; and then stirring and mixing the two materials for 1h at 25 ℃, carrying out blending to obtain an inclusion compound, and then carrying out freeze drying on the inclusion compound to obtain the Ag-Zn composite antibacterial material wrapped with cyclodextrin.
Preparation example II-3
An Ag-Zn composite antibacterial material coated with cyclodextrin is prepared by the following steps:
1) surface treatment of adamantane derivative:
dissolving 4-dimethylaminopyridine 5g and Ag-Zn composite antibacterial material obtained in preparation example I-6 5g in chloroform, adding adamantane formyl chloride 5g, mixing uniformly, adding dehydrating agent DCC 5g, reacting for 48h at 60 ℃, washing and filtering with chloroform for 2 times, washing and filtering with dichloromethane solution for 2 times, washing with HCl 1mol/L for 1 time, washing with absolute ethyl alcohol for 3 times, washing with distilled water for 3 times, centrifuging, and drying to obtain adamantane-Ag-Zn composite antibacterial material;
2) encapsulating cyclodextrins
Dissolving beta-cyclodextrin in water, wherein the ratio of the beta-cyclodextrin to the water is that 1g of the beta-cyclodextrin corresponds to 10ml of distilled water, dissolving the Ag-Zn composite antibacterial material obtained in the step 1) in absolute ethyl alcohol, and the ratio of the Ag-Zn composite antibacterial material to the absolute ethyl alcohol is that 1g of the Ag-Zn composite antibacterial material corresponds to 3ml of the absolute ethyl alcohol; and then stirring and mixing the two materials for 1h at 25 ℃, carrying out blending to obtain an inclusion compound, and then carrying out freeze drying on the inclusion compound to obtain the Ag-Zn composite antibacterial material wrapped with cyclodextrin.
Preparation example II-4
An Ag-Zn composite antibacterial material coated with cyclodextrin is prepared by the following steps:
1) surface treatment of adamantane derivative:
dissolving 4-dimethylaminopyridine 6g and Ag-Zn composite antibacterial material obtained in preparation example I-6 4g in chloroform, adding adamantane formyl chloride 6g, mixing uniformly, adding dehydrating agent DCC 4g, reacting for 48h at 60 ℃, washing and filtering with chloroform for 2 times, washing and filtering with dichloromethane solution for 2 times, washing with HCl 1mol/L for 1 time, washing with absolute ethyl alcohol for 3 times, washing with distilled water for 3 times, centrifuging, and drying to obtain adamantane-Ag-Zn composite antibacterial material;
2) encapsulating cyclodextrins
Dissolving beta-cyclodextrin in water, wherein the ratio of the beta-cyclodextrin to the water is that 1g of the beta-cyclodextrin corresponds to 10ml of distilled water, dissolving the Ag-Zn composite antibacterial material obtained in the step 1) in absolute ethyl alcohol, and the ratio of the Ag-Zn composite antibacterial material to the absolute ethyl alcohol is that 1g of the Ag-Zn composite antibacterial material corresponds to 3ml of the absolute ethyl alcohol; and then stirring and mixing the two materials for 1h at 25 ℃, carrying out blending to obtain an inclusion compound, and then carrying out freeze drying on the inclusion compound to obtain the Ag-Zn composite antibacterial material wrapped with cyclodextrin.
Examples
Example 1
An antibacterial and fingerprint-resistant liquid for a touch screen panel is prepared by the following steps:
the raw materials are uniformly mixed according to the raw material proportion of the table 1 to obtain the antibacterial and fingerprint-proof liquid for the touch screen panel, wherein the Ag-Zn composite antibacterial material is prepared from the preparation example I-1.
TABLE 1 EXAMPLES 1-7 raw materials proportioning Table (g)
Examples 8 to 13
Unlike example 6, the Ag — Zn composite antibacterial materials of examples 8 to 12 were obtained from preparation example I-2 to preparation example I-7, respectively.
Examples 14 to 17
Unlike example 12, examples 14 to 17 each replaced the Ag-Zn composite antibacterial material with the same amount of cyclodextrin-coated Ag-Zn composite antibacterial material from preparation example II-1 to preparation example II-4.
Comparative example
Comparative example 1
Unlike example 1, the Ag-Zn composite antibiotic material prepared in comparative example 1 had a silver ion concentration of 7X 10 - 5 mol/L。
Comparative example 2
Unlike example 1, the Ag-Zn composite antibiotic material prepared in comparative example 2 had a silver ion concentration of 11X 10 - 5 mol/L。
Comparative example 3
Unlike example 1, the zinc ion concentration of the Ag-Zn composite antibacterial material prepared in comparative example 3 was 0.6 mol/L.
Comparative example 4
Unlike example 1, the Ag-Zn composite antibiotic material prepared in comparative example 4 had a zinc ion concentration of 1 mol/L.
Performance test
Detection method/test method
The fingerprint-proof performance and the antibacterial performance of the fingerprint-proof liquid in the examples 1 to 17 and the comparative examples 1 to 4 are detected, and the detection results are shown in table 2.
Fingerprint residual rate: the test time is 2-5 pm, and the human body has more sweat and grease. The specific operation is as follows: cleaning hand with hand sanitizer, wiping, rubbing index finger on forehead or behind ear, dipping oil and sweat on skin, and pressing sample to be tested. After pressing the fingerprint, firstly shooting a macroscopic picture of the fingerprint residue on the surface of the glass by using an industrial camera, processing the macroscopic picture by using Image J software, setting a threshold value, analyzing and extracting the area of a fingerprint pavement and an acquisition area by adopting a binary method, wherein the ratio of the area to the area of the acquisition area is the fingerprint residue rate.
And (3) detecting the antibacterial performance: according to the detection standard of coated antibacterial glass, JC/T1054-wall 2007, the antibacterial performance detection is carried out:
1. cutting the coated touch screen display board into ten test boards with the size of 50x50mm, sterilizing before experiment, washing with deionized water, slightly wiping the test boards with 75% ethanol solution, washing with sterile water and drying for later use;
2. culturing staphylococcus aureus and escherichia coli on a nutrient agar culture medium, and culturing for 24h at 37 ℃ to prepare a bacterial liquid;
3. 0.4ml of bacterial liquid is dripped on an antibacterial touch screen display plate sample, cover films are clamped by sterilization forceps to respectively cover the antibacterial glass sample, the sample is paved to be uniformly contacted with the bacterial liquid, the sample is placed in a sterilization flat dish, and the culture is carried out for 24 hours under the conditions that the temperature is 37 ℃ and the relative humidity RH is more than or equal to 90 percent;
4. and taking out the samples cultured for 24h, respectively adding 20ml of washing liquor, repeatedly washing the samples and covering films, fully shaking up, and respectively inoculating the washing liquor into nutrient agar culture media. The cells were cultured at 37 ℃ for 24 hours and viable cells were counted.
TABLE 2 Performance test results
| Fingerprint residual ratio/%) | Antibacterial Rate/% (after 3 d) | Antibacterial Rate/% (after 30 d) | |
| Example 1 | 12.52 | 99.85 | 99.17 |
| Example 2 | 11.85 | 99.91 | 99.21 |
| Example 3 | 12.24 | 99.87 | 99.18 |
| Example 4 | 11.26 | 99.95 | 99.25 |
| Example 5 | 10.74 | 99.96 | 99.28 |
| Example 6 | 10.35 | 99.99 | 99.31 |
| Example 7 | 10.83 | 99.96 | 99.28 |
| Example 8 | 9.78 | 99.99 | 99.35 |
| Example 9 | 10.26 | 99.99 | 99.32 |
| Example 10 | 9.14 | 99.99 | 99.39 |
| Example 11 | 9.53 | 99.99 | 99.36 |
| Example 12 | 8.44 | 99.99 | 99.44 |
| Example 13 | 8.76 | 99.99 | 99.42 |
| Example 14 | 7.93 | 99.99 | 99.47 |
| Example 15 | 7.24 | 99.99 | 99.52 |
| Example 16 | 6.45 | 99.99 | 99.57 |
| Example 17 | 7.01 | 99.99 | 99.53 |
| Comparative example 1 | 12.68 | 98.91 | 89.56 |
| Comparative example 2 | 12.74 | 99.12 | 90.56 |
| Comparative example 3 | 12.69 | 99.23 | 91.56 |
| Comparative example 4 | 12.81 | 99.31 | 92.12 |
Combining examples 1-17 with comparative examples 1-4, and combining table 2, it can be seen that the fingerprint resistance ratio in examples 1-17 is lower than that in comparative examples 1-4, 3d and 30d, and the antibacterial property is higher than that in comparative examples 1-4, which indicates that the fingerprint-resistant liquid of the present application is not only superior in fingerprint resistance, but also superior in antibacterial property.
Combining example 1 with comparative examples 1-4, and combining table 2, it can be seen that the fingerprint preventing rate in example 1 is lower than that in comparative examples 1-4, 3d and 30d, and the antibacterial property is higher than that in comparative examples 1-4, which is probably because the most critical factor of the silver ion influencing the antibacterial property of the Ag-Zn composite antibacterial material, and the silver ion and zinc ion concentration in the present application cooperate to achieve better antibacterial property.
By combining example 12 with examples 14 to 17 and table 2, it can be seen that the antibacterial rate of 3d in examples 14 to 17 is not significantly changed and can reach 99.99% compared with example 12, but the antibacterial rate of 30d is significantly increased, which is probably because the chitosan coating delays the release of silver ions and improves the long-acting property of the antibacterial material.
The specific embodiments are only for explaining the present application and are not limiting to the present application, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The antibacterial and fingerprint-resistant liquid for the touch screen panel is characterized by comprising the following raw materials in parts by weight: 0.3-0.5 part of perfluoropolyether, 99.5-99.7 parts of methyl nonafluorobutyl ether and 1-3 parts of Ag-Zn composite antibacterial material;
the Ag-Zn composite antibacterial material is prepared by loading silver ions and zinc ions on a silicon dioxide carrier;
the Ag-Zn composite antibacterial material is prepared with Ag ion concentration of 8X 10-5-10X 10-5mol/L and Zn ion concentration of 0.7-0.9 mol/L.
2. The antibacterial and fingerprint preventing liquid for touch screen panels according to claim 1, wherein: the preparation method of the Ag-Zn composite antibacterial material comprises the following steps:
1) uniformly mixing a silver nitrate aqueous solution and a zinc sulfate aqueous solution, and adjusting the pH value of the mixed solution to 9-11 to obtain a mixed solution;
2) adding a silicon dioxide carrier into the mixed solution obtained in the step 1), uniformly mixing, centrifuging to obtain a precipitate, reducing the precipitate in the shade overnight under ultraviolet rays for 1h, and grinding into powder to obtain the Ag-Zn composite antibacterial material; wherein the proportion of the silicon dioxide carrier to the mixed solution is that 1g of the silicon dioxide carrier corresponds to 400-500ml of the mixed solution.
3. The antibacterial and fingerprint preventing liquid for touch screen panels according to claim 2, wherein: and adjusting the pH value of the mixed solution to 10 in the step 1).
4. The antibacterial and fingerprint preventing liquid for a touch screen panel according to claim 1, wherein: the Ag-Zn composite antibacterial material is wrapped by cyclodextrin.
5. The antibacterial and fingerprint preventing liquid for touch screen panels according to claim 4, wherein: before the Ag-Zn composite antibacterial material is coated by cyclodextrin, the surface of the Ag-Zn composite antibacterial material is treated by adamantane derivatives.
6. The antibacterial and fingerprint preventing liquid for touch screen panels according to claim 5, wherein: the preparation method of the Ag-Zn composite antibacterial material coated with cyclodextrin comprises the following steps:
1) surface treatment of adamantane derivative:
dissolving 4-6 parts of 4-dimethylaminopyridine and 4-6 parts of Ag-Zn composite antibacterial material in trichloromethane, then adding 4-6 parts of adamantane formyl chloride, uniformly mixing, adding 4-6 parts of dehydrating agent, reacting for 48 hours at 60 ℃, then washing with trichloromethane solution, dichloromethane solution, hydrochloric acid and absolute ethyl alcohol distilled water in sequence, finally centrifuging and drying to obtain the adamantane-Ag-Zn composite antibacterial material;
2) encapsulating cyclodextrins
Dissolving cyclodextrin in water, dissolving adamantane-Ag-Zn composite antibacterial material in ethanol, stirring and mixing the two at 20-25 ℃ for 1h, carrying out inclusion to obtain an inclusion compound, and then carrying out freeze drying on the inclusion compound to obtain the Ag-Zn composite antibacterial material wrapped with cyclodextrin.
7. The antibacterial and fingerprint preventing liquid for touch screen panels according to claim 1, wherein: it also comprises 0.2 to 0.4 weight portion of acrylic varnish.
8. A method for preparing the antibacterial and fingerprint preventing liquid for a touch screen panel according to any one of claims 1 to 7, comprising the steps of:
and uniformly mixing all the raw materials to obtain the antibacterial and fingerprint-resistant liquid for the touch screen panel.
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