Method for preparing rodlike silica-based composite photocatalytic antibacterial water-based interior wall paint

A composite photocatalysis and silica technology, used in biocide-containing paints, antifouling/underwater coatings, coatings, etc., can solve the problem of insufficient antibacterial effect, decreased adhesion of interior wall paint, and excessive polymer latex particles. It can improve the antibacterial and bactericidal effect, the photocatalytic antibacterial performance is excellent, and the film forming ability is good.

Inactive Publication Date: 2021-05-11
CHONGQING UNIV OF ARTS & SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In summary, the object of the present invention is to provide a method for preparing a rod-shaped silica-based composite photocatalytic antibacterial water-based interior wall paint, so as to solve the problem of insufficient antibacterial effect of adding a single structure or a single type of photocatalytic particles in the prior art, The agglomeration of photocatalytic particles causes the polymer latex particles in the paint to be too large and too hard, and there are problems such as the decrease of the adhesion of the interior wall paint

Method used

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  • Method for preparing rodlike silica-based composite photocatalytic antibacterial water-based interior wall paint

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Embodiment 1

[0028] The method for preparing rod-shaped silica-based composite photocatalytic antibacterial water-based interior wall paint comprises the following steps:

[0029] Step 1, configure the precursor solution of silica-based composite photocatalytic particles: Weigh the silica source silicon tetrachloride and dissolve it in ultrapure water, control the precipitation of the silicon-ammonia complex by adding ammonia solution, and then The precipitate was separated by filtration, and then the precipitate was fully washed with ultrapure water and absolute ethanol, and dried in a constant temperature drying oven to obtain a silicon ammonia complex precipitate. Subsequently, a solution of 6 mg / mL attached photocatalytic nanoparticle graphene and reduced graphene oxide was added to the prepared silicon-ammonia complex precipitation, and was configured into a 0.5 mol / L precursor solution by ammonia water and ultrapure water, A homogeneously dispersed precursor solution of silica-based ...

Embodiment 2

[0031] The method for preparing rod-shaped silica-based composite photocatalytic antibacterial water-based interior wall paint comprises the following steps:

[0032] Step 1, configure the precursor solution of silica-based composite photocatalytic particles: Weigh the silica source silicon tetrachloride and dissolve it in ultrapure water, control the precipitation of the silicon-ammonia complex by adding ammonia solution, and then The precipitate was separated by filtration, and then the precipitate was fully washed with ultrapure water and absolute ethanol, and dried in a constant temperature drying oven to obtain a silicon ammonia complex precipitate. Subsequently, a solution of 6 mg / mL attached photocatalytic nanoparticle graphene and reduced graphene oxide was added to the prepared silicon-ammonia complex precipitation, and was configured into a 1.75 mol / L precursor solution by ammonia water and ultrapure water, A homogeneously dispersed precursor solution of silica-based...

Embodiment 3

[0034] The method for preparing rod-shaped silica-based composite photocatalytic antibacterial water-based interior wall paint comprises the following steps:

[0035]Step 1, configure the precursor solution of silica-based composite photocatalytic particles: Weigh the silica source silicon tetrachloride and dissolve it in ultrapure water, control the precipitation of the silicon-ammonia complex by adding ammonia solution, and then The precipitate was separated by filtration, and then the precipitate was fully washed with ultrapure water and absolute ethanol, and dried in a constant temperature drying oven to obtain a silicon ammonia complex precipitate. Subsequently, a solution of 6 mg / mL attached photocatalytic nanoparticle graphene and reduced graphene oxide was added to the prepared silicon-ammonia complex precipitation, and configured into a 2.5 mol / L precursor solution by ammonia water and ultrapure water, A homogeneously dispersed precursor solution of silica-based compo...

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Abstract

The invention relates to a method for preparing rodlike silica-based composite photocatalytic antibacterial water-based interior wall paint. The method comprises the steps of preparing a silica-based composite photocatalytic particle precursor solution; mechanically stirring and uniformly mixing the precursor solution and the components of the water-based interior wall paint in sequence to obtain a mixed coating; and carrying out microwave reaction synthesis on the mixed coating to obtain the composite photocatalytic antibacterial water-based interior wall paint. The silica-based composite photocatalytic nanoparticles are dispersed in the water-based interior wall paint in the form of a precursor mixed solution, the stability is better, the dispersity is better, the particles are not prone to agglomeration, the attached photocatalytic nanoparticles are uniformly dispersed and coated on the rodlike silicon dioxide photocatalytic particles, the specific surface area is larger, and the antibacterial inactivation is better; due to different adding sequences and adding processes, the water-based interior wall paint is good in mechanical property, and photocatalytic particles are not prone to falling off; and the silica can increase the strong adsorption effect of acid sites on the surfaces of the photocatalytic particles on organic matters and control the growth of the composite photocatalytic particles, so that the photocatalytic antibacterial effect is further improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic environmental protection coatings, and in particular relates to a method for preparing rod-shaped silica-based composite photocatalytic antibacterial water-based interior wall paints. Background technique [0002] Photocatalytic particles have good indoor bactericidal ability by using photocatalytic mechanism, but when using photocatalytic particles combined with interior wall paint to produce environmentally friendly antibacterial water-based coatings, most of the current photocatalytic antibacterial interior wall paints use photocatalytic particles and water-based The raw materials of interior wall paint are prepared by simple mechanical stirring, but the photocatalytic particles are easy to agglomerate, causing the polymer latex particles in the paint to be too large and too hard, and there are problems such as poor water resistance and decreased adhesion of the interior wall paint. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/14C09D7/61
CPCC08K2003/265C08K2201/011C09D5/14C09D175/04C09D7/61C09D7/70C08K3/36C08K3/042C08K3/26C08K3/346C08K7/00C08K13/04
Inventor 翟福强李璐罗永以陈西浩
Owner CHONGQING UNIV OF ARTS & SCI
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