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A kind of preparation method of antibacterial coating

An antibacterial coating and layer-by-layer assembly technology, which is applied in coatings, metal material coating processes, and biocide-containing paints, etc., can solve the problems of special requirements for matrix materials, complex preparation processes, and high costs, and achieve the preparation cost. Low, simple process, fast response effect

Inactive Publication Date: 2018-11-06
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the existing surface antibacterial modification technologies require expensive equipment, some have complex preparation processes, time-consuming, and high costs, and some have special requirements for matrix materials.

Method used

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  • A kind of preparation method of antibacterial coating
  • A kind of preparation method of antibacterial coating
  • A kind of preparation method of antibacterial coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of antibacterial coating, concrete steps are as follows:

[0025] (1) Substrate pretreatment: clean the polyethylene until the surface is clean;

[0026] (2) Layer-by-layer assembly: sequentially spin-coat the dopamine hydrochloride solution with a concentration of 1 mg / mL and the silver nitrate solution with a concentration of 5 mM on the surface of the material after the pretreatment in step (1), the spin-coating speed is 4000 rpm, and the spin-coating time is 60 s; Each solution is used as a layer-by-layer assembly cycle, a total of 20 cycles, and then blown dry with nitrogen;

[0027] (3) Ultraviolet light irradiation: put the material obtained after step (2) spin-coating into a wavelength of 400nm and a power of 1000W for 5 minutes to irradiate with an ultraviolet lamp to obtain an antibacterial coating containing nano-silver on the surface.

Embodiment 2

[0029] A kind of preparation method of antibacterial coating, specifically as follows:

[0030] (1) Substrate pretreatment: clean the glass until the surface is clean;

[0031] (2) Layer-by-layer assembly: Spin-coat the dopamine hydrochloride solution with a concentration of 2 mg / mL and the silver nitrate solution with a concentration of 20 mM on the surface of the material pretreated in step (1) in turn, with a spin-coating speed of 500 rpm and a spin-coating time of 30 s; Each solution was circulated as a layer-by-layer assembly cycle for a total of 10 times, and then dried with nitrogen;

[0032] (3) Ultraviolet light irradiation: the material obtained after step (2) spin-coating is placed under a UV lamp with a wavelength of 200nm and a power of 800W for 10 minutes to obtain an antibacterial coating containing nano-silver on the surface.

Embodiment 3

[0034] A kind of preparation method of antibacterial coating, specifically as follows:

[0035] (1) Substrate pretreatment: clean the stainless steel until the surface is clean;

[0036] (2) Layer-by-layer assembly: sequentially spin-coat the dopamine hydrochloride solution with a concentration of 4 mg / mL and the silver nitrate solution with a concentration of 60 mM on the surface of the material after the pretreatment in step (1), at a spin-coating speed of 1000 rpm and a spin-coating time of 20 s; Each solution was circulated as a layer-by-layer assembly cycle, a total of 15 cycles, and then dried with nitrogen;

[0037] (3) Ultraviolet light irradiation: put the material obtained after step (2) spin-coating into a wavelength of 300nm and a power of 600W under an ultraviolet lamp for 10 minutes to obtain an antibacterial coating containing nano-silver on the surface.

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Abstract

The invention discloses a preparation method of an anti-bacterial coating. Firstly, the surface of a base material is cleaned, then layer-by-layer assembly is performed, the surface of the pre-processed base material is sequentially coated with a hydrochloride dopamine solution with the concentration being 1-10 mg / mL and a silver nitrate solution with the concentration being 5-100 mg / mL in a spinning mode, layer-by-layer assembly circulation is complete one time after spin coating of the two solutions is completed, circulation is performed for 1-20 times, and then blow-drying is performed through nitrogen; finally, a material obtained after spin rotation is placed under an ultraviolet lamp with the wavelength being 200-400 nm and the power being 5-1000 W to be irradiated for 5-30 min, and the anti-bacterial coating with nano silver on the surface is obtained. Dopamine polymerization is triggered through ultraviolet light, meanwhile, silver nitrate is reduced into nano silver, the advantages that the steps are simple, reaction time is short, no special devices are needed, the range of applicable matrix materials is wide, and preparation cost is low are achieved, and a new idea is provided for preparation of the anti-bacterial coating on the surfaces of the materials.

Description

technical field [0001] The invention belongs to the technical field of surface material engineering, and in particular relates to a preparation method of an antibacterial coating. Background technique [0002] The existence, adhesion and aggregation of bacteria on the surface of materials have had a serious impact on daily life and industrial production. For food packaging materials, the presence of bacteria will increase the risk of disease and reduce the storage time of food; for water purification devices, the formation of bacterial biofilm on the surface of the purification membrane will increase the maintenance cost of the product. In addition, the biocorrosion of marine equipment is mainly caused by the accumulation of bacteria and microorganisms on the surface of materials. Therefore, antibacterial materials are playing an increasingly important role in protecting the living environment of human beings and improving people's health. The research and development of ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/06C09D5/14C03C17/38C23C20/04C23C18/14
CPCC03C17/38C03C2217/479C03C2217/48C03C2218/116C08J7/06C08J2323/06C09D5/14C23C18/14C23C20/04
Inventor 刘鹏袁璋
Owner CHONGQING UNIV