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Method for preparing composite sterilization coating

A coating and a new type of technology, applied in the field of preparation of new composite sterilization coatings, can solve the problems of affecting appearance, not easy to change color, easy to change color, etc., and achieve the effect of fast sterilization performance

Active Publication Date: 2006-07-19
FUZHOU UNIV
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of poor stability and easy discoloration that affect appearance during the combined use of existing photocatalysts and metal ions, especially when it is coated on the surface of wall coatings, it is prone to oxidative discoloration and other phenomena. The present invention provides a A preparation method of a novel composite sterilizing coating, the coating prepared by the method has good stability and the coating is not easy to change color

Method used

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Examples

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preparation example Construction

[0014] 1. The preparation of titanium dioxide sol, including the preparation of pure titanium dioxide sol and composite titanium dioxide sol containing other oxides.

[0015] (1) Preparation of pure titanium dioxide sol: hydrolyze titanium alkoxide (such as tetraisopropyl titanate, tetrabutyl titanate) under the condition of acidic pH7 to obtain a uniform and transparent sol, Adjust the pH value of the sol to 1-5 by dialysis.

[0016] (2) Preparation of composite titanium dioxide sol: There are two methods for preparing composite titanium dioxide sol containing other oxides. The first preparation method is to hydrolyze the alkoxide of silicon, aluminum, zirconium, zinc or tin into a uniform and transparent single-component SiO under the condition of acidic pH7 2 、Al 2 o 3 , ZrO 2 , ZnO or SnO sol, adjust the pH value to 1-5 respectively, and then mix one or more of them with the titanium dioxide sol, according to the ratio of the total weight content of the above-mentioned...

Embodiment 1

[0029] Embodiment 1: the preparation of pure titanium dioxide sol type light purification coating

[0030] Add 1.1 milliliters of concentrated nitric acid (68%) into 150 milliliters of deionized water to make a uniform solution, slowly drop 12.5 milliliters of tetraisopropyl titanate into the acidic aqueous solution under vigorous stirring, and hydrolyze the suspension containing white precipitate The solution was continuously stirred at 40°C until the white precipitate dissolved to form a uniform and transparent sol. Put the sol into a dialysis membrane bag and perform dialysis treatment with 2 liters of deionized water, and change the water every 12 hours until the final pH value of the dialysis water is 3.2. The sol was removed from the dialysis bag to obtain a pure titania sol at a concentration of approximately 2.5%. The paint is marked as T.

Embodiment 2

[0031] Embodiment 2: Preparation of titanium dioxide-silica composite sol type light purification coating

[0032] Under vigorous stirring, slowly drop 5 ml of ethyl orthosilicate into a solution prepared by 0.25 ml of concentrated nitric acid (68%) and 10 ml of deionized water, and continue stirring until a uniform transparent silica sol is formed. After the sol passed through dialysis, 10 ml of it was mixed with 100 ml of the titanium dioxide sol prepared in Example 1, and then the same dialysis treatment as in Example 1 was carried out to adjust the pH value to 2.8. In this coating, the titanium dioxide content was 2.3% by weight, the silicon dioxide content was 1.1% by weight, and the pH value was 2.8. This coating is noted as TS.

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Abstract

The related preparation method for a new composite germicidal paint comprises: preparing metal ion organic solution, or metal ion complex solution, or metal iodide sol by the silver or copper or other water-soluble metal salts with sterilization effect; adding the said solution or sol into the composite photocatalyst with TiO2 sol or other oxide to obtain the sol paint. This invention overcomes the poor stability and oxidizable phenomenon in prior art.

Description

technical field [0001] The invention relates to coatings in building materials, in particular to a preparation method of a novel composite sterilizing coating which has both chemical and photocatalytic sterilization functions, good stability, and a coating that is not easy to change color. Background technique [0002] How to make indoor building materials and sanitary utensils have sterilizing or antibacterial effects is a goal pursued by the current environmental protection product research institute. For this reason, various techniques have been developed to achieve this goal. At present, the sterilization techniques used in the market mainly include: (1) Sterilization using inorganic heavy metal ions. For example, loading antibacterial metal salts on a carrier with a pore size of 3-10 Å is added as an additive to pigments, paints, paints, putty powder or building cement products, so that building materials have a sterilization function; Loaded on the surface of nano-pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/14
Inventor 付贤智刘平戴文新邵宇员汝胜陈旬丁正新
Owner FUZHOU UNIV
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