Preparation method for nano-antibacterial coating

An antibacterial coating and nano technology, which is applied in the field of preparation of nano antibacterial coatings, can solve the problems of poor heat resistance and anti-aging properties, insignificant anti-bacterial effect, limited application range of coatings, etc., and achieve improved anti-aging properties and anti-bacterial properties. Good effect and low cost effect

Inactive Publication Date: 2016-09-07
郭舒洋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved by the present invention: for the antibacterial coating with organic antibacterial agent, due to the poor heat resistance and aging resistance of the organic antibacterial agent, its antibacterial effect is not obvious, so that the scope of use of the coating is severely limited , provides a method of first using stearic acid to modify the surface of nano-titanium dioxide, so that the carboxyl group in stearic acid and the hydroxyl group of the nano-particle particles have undergone a reaction similar to acid and alcohol to form an ester, so that the polarity of the titanium dioxide surface is changed. It is non-polar to obtain lipophilic nano-titanium dioxide, and then use vinyl triethoxysilane and 3-glycidyl etheroxypropyl trimethoxysilane to modify the surface of nano-ferric oxide, and mix the two to form a gel Body fluid, which is then mixed with a substance such as polyethersulfone resin to form an antibacterial coating, and finally cured to form an antibacterial coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First take by weighing 12g of nanometer titanium dioxide, mix with mass fraction 80% ethanol according to solid-liquid ratio 1:10, ultrasonic dispersion 20min, obtain dispersion liquid, then take by weighing 4g stearic acid and dissolve in 150mL carbon tetrachloride, add solution to In the dispersion liquid, continue to ultrasonically disperse for 15 minutes, put it into an oil bath, raise the temperature to 120°C at a heating rate of 15°C / min, keep stirring at this temperature for 3h, and put the reactant into a centrifuge after the reaction is completed. Centrifuge at 7000r / min for 30min to obtain a precipitate, wash it with chloroform for 5 times, put it in an oven after cleaning, and dry it at 70°C for 8h to obtain lipophilic nano-titanium dioxide for later use; then weigh 10g of vinyl Triethoxysilane and 8g of 3-glycidyl etheroxypropyltrimethoxysilane were mixed and then added to a 15% hydrochloric acid solution at a mass ratio of 1:1, placed in a water bath and sti...

example 2

[0021]First take by weighing 8g of nanometer titanium dioxide, mix with mass fraction 80% ethanol according to solid-liquid ratio 1:10, ultrasonic dispersion 15min, obtain dispersion liquid, then take by weighing 3g stearic acid and dissolve in 120mL carbon tetrachloride, add solution to In the dispersion liquid, continue to ultrasonically disperse for 10 minutes, put it into an oil bath, raise the temperature to 90°C at a heating rate of 10°C / min, keep stirring at this temperature for 2h, and put the reactant into a centrifuge after the reaction is completed. Centrifuge at 5000r / min for 20min to obtain a precipitate, wash it with chloroform three times, put it in an oven after cleaning, and dry it at 60°C for 6h to obtain lipophilic nano-titanium dioxide for later use; then weigh 5g of vinyl Triethoxysilane and 5g of 3-glycidyl etheroxypropyltrimethoxysilane were mixed and then added to a 15% hydrochloric acid solution at a mass ratio of 1:1, placed in a water bath and stirred...

example 3

[0024] First take by weighing 10g of nanometer titanium dioxide, mix with mass fraction 80% ethanol according to solid-liquid ratio 1:10, ultrasonic dispersion 17min, obtain dispersion liquid, then take by weighing 3g stearic acid and dissolve in 130mL carbon tetrachloride, add solution to In the dispersion liquid, continue to ultrasonically disperse for 12 minutes, put it into an oil bath, raise the temperature to 100°C at a heating rate of 12°C / min, keep stirring and reacting at this temperature for 2h, and put the reactant into a centrifuge after the reaction. Centrifuge at 6000r / min for 25min to obtain a precipitate, wash it with chloroform for 4 times, put it in an oven after cleaning, and dry it at 65°C for 7h to obtain lipophilic nano-titanium dioxide for later use; then weigh 7g of vinyl Triethoxysilane and 6g of 3-glycidyl etheroxypropyltrimethoxysilane were mixed and then added to a 15% hydrochloric acid solution at a mass ratio of 1:1, placed in a water bath and stir...

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Abstract

The invention relates to a preparation method for a nano-antibacterial coating, belonging to the technical field of coating preparation. The preparation method comprises the following steps: performing surface modification on nanometer titania with stearic acid, such that carboxyl in the stearic acid and hydroxyl in nanoparticles perform a reaction like a reaction of acid and alcohol into ester, so as to transform the surface of the titania from the polarity to the nonpolarity, thereby obtaining lipophilic nano titania; then, performing surface modification on nano iron trioxide with vinyl triethoxyl silane and glycidyl 3-(trimethoxysilyl)propyl ether; mixing the lipophilic nano titania and the modified iron trioxide to form colloidal fluid; next, mixing the colloidal fluid and substances, such as polyethersulfone resin to form an antibacterial paint and finally curing the antibacterial paint to form the antibacterial coating. The anti-aging performance of the nano-antibacterial coating prepared by the preparation method is improved by 20 to 25 percent; under the temperature of 200 to 300 DEG C, the antibacterial ratio generally reaches 95 percent or more. The nano-bacterial coating has a good antibacterial effect and can be widely applied to the field of household appliances and daily supplies.

Description

technical field [0001] The invention relates to a method for preparing a nanometer antibacterial coating, which belongs to the technical field of coating preparation. Background technique [0002] The multi-phase composite coating with nanostructure includes at least two phases, one phase is a nanocrystalline phase, and the other metal phase or an amorphous ceramic matrix is ​​implanted. In this structure, the small grain size reduces the dislocation density on the one hand, and hinders the movement of dislocations on the other hand, thereby increasing the hardness of the material. In recent years, the use of nanomaterials to make bactericidal (called "antibacterial" in our country) coatings is a hot technology that scientists in developed countries are competing to develop. The "photocatalyst" that people are familiar with in the past mainly uses nano-titanium dioxide as an antibacterial material. It needs to be irradiated by ultraviolet rays to decompose water and oxygen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D181/06C09D5/14C09D7/12
CPCC09D181/06C08K3/22C08K9/04C08K9/06C08K13/06C08K2003/2241C08K2003/2272C09D5/14C09D7/62C09D7/63
Inventor 郭舒洋薛培龙王统军
Owner 郭舒洋
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