Preparation method and use of hydrophilic automatically-cleaning coating with photocatalytic activity

A photocatalytic active and hydrophilic technology, applied in coatings, photovoltaic modules, photovoltaic power generation, etc., can solve the problems of difficult industrial application, short hydrophilicity retention period of coatings, etc., and achieve the effect of reducing cleaning cycles

Inactive Publication Date: 2012-03-21
NORTH WEST YONGXIN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, butyl titanate and ethyl orthosilicate are used as precursors at room temperature, and the nano-titanium dioxide formed by hydrolysis is amorphous, and only after 500 o High temperature treatment above C can form anatase titanium dioxide, which has photocatalytic activity, and the hydrophilicity retention period of the coating is short, which becomes the bottleneck factor of practical application, and it is difficult to realize industrial application.

Method used

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  • Preparation method and use of hydrophilic automatically-cleaning coating with photocatalytic activity
  • Preparation method and use of hydrophilic automatically-cleaning coating with photocatalytic activity
  • Preparation method and use of hydrophilic automatically-cleaning coating with photocatalytic activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Preparation of silica sol: Accurately measure 50ml of absolute ethanol and place it in a 200ml beaker. o In the water bath of C, adjust the pH=2.0 with hydrochloric acid with a mass concentration of 36-38%, and stir for 30 min (at a speed of 3000 rad / min); add 7 ml of tetraethyl orthosilicate, and stir for 10 min; add 5.0 ml of double distilled water, Stirring was continued for 30 min to obtain a colorless and transparent silica sol.

[0034] ② Preparation of titanium sol: Accurately measure 100ml of absolute ethanol and place it in a 500ml beaker. o In the water bath of C, adjust the pH=2.0 with hydrochloric acid with a mass concentration of 36-38%, and stir for 30 min (at a speed of 3000 rad / min); add 2 ml of butyl titanate, and stir for 10 min; add 10 ml of twice distilled water, and continue stirring After 30 min, a colorless and transparent titanium sol was obtained.

[0035] ③ Preparation of silicon-titanium composite sol: Slowly add 50ml of silica sol into ...

Embodiment 2

[0038] (1) Preparation of silica sol: Accurately measure 50ml of absolute ethanol and place it in a 200ml beaker. o In the water bath of C, adjust the pH=2.5 with hydrochloric acid with a mass concentration of 36-38%, and stir for 30 min (stirring speed 2500 rad / min); add 3.5ml of tetraethyl orthosilicate under stirring, stir for 30min; double distilled water, and continued to stir for 30 min to obtain a colorless and transparent silica sol.

[0039] (2) Preparation of titanium sol: Accurately measure 100ml of absolute ethanol and place it in a 500ml beaker. o In the water bath of C, adjust the pH=2.5 with hydrochloric acid with a mass concentration of 36-38%, and stir for 20 min (at a speed of 2500 rad / min); add 2 ml of butyl titanate under stirring, and stir for 10 min; add 8.0 ml of twice distilled water , and continued stirring for 30 min to obtain a colorless and transparent titanium sol.

[0040] (3) Preparation of paint: Slowly add 50 ml of silica sol into 100 ml of t...

Embodiment 3

[0043] (1) Preparation of silica sol: Accurately measure 50ml of absolute ethanol in a 200ml beaker, o In the water bath of C, adjust the pH=3.5 with hydrochloric acid with a mass concentration of 36-38%, and stir for 10 min (stirring speed is 2000 rad / min); ml of double-distilled water, and continued to stir for 30 min to obtain a colorless and transparent silica sol.

[0044] (2) Preparation of titanium sol: Accurately measure 100ml of absolute ethanol and place it in a 500ml beaker. o In the water bath of C, adjust the pH=3.5 with hydrochloric acid with a mass concentration of 36-38%, and stir for 30 min (stirring speed is 2000rad / min); add 3.0ml of butyl titanate under stirring, and stir for 10min; distilled water and continued to stir for 30 min to obtain a colorless and transparent titanium sol.

[0045] (3) Preparation of paint: Slowly add 50ml of silica sol into 100ml of titanium sol, and continue stirring for 1.5h to obtain a colorless and transparent silica-titaniu...

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Abstract

The invention provides a preparation method of a hydrophilic automatically-cleaning coating with photocatalytic activity, and belongs to the technical field of chemical engineering. The preparation method is characterized in that butyl titanate and ethyl orthosilicate are utilized as precursors; nanoscale TiO2 / SiO2 sol is formed through a sol-gel method; and the nanoscale TiO2 / SiO2 sol is coated on the surface of an object and is naturally dried at normal temperature to form an anatase nanoscale TiO2 / SiO2 composite film with photocatalytic activity. When the anatase nanoscale TiO2 / SiO2 composite film with photocatalytic activity is coated on a solar photovoltaic panel, a vehicle window glass plate or a building glass plate at a normal temperature, the anatase nanoscale TiO2 / SiO2 composite film with photocatalytic activity can fast form a hydrophilic coating. Under natural light irradiation, the hydrophilic coating can decompose greasy dirt adhered to the hydrophilic coating into inorganic pollutants, and through rainwater flushing or artificial washing, the inorganic pollutants are removed so that the solar photovoltaic panel or the vehicle window glass plate or the building glass plate is kept as clean as a new one for a long time. The preparation method provided by the invention reduces a production management cost and improves solar photovoltaic panel generating efficiency.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a preparation method of a hydrophilic self-cleaning paint with photocatalytic activity, and also relates to the application of the paint. Background technique [0002] According to the national energy policy, 20 million kW solar power generation planning, 10 million kW solar power generation planning and incentive policies in industrial development zones, the time for the great development of solar energy has come. But at the same time, there have been practical problems such as dust and other pollutants on the surface of solar panels affecting light transmittance, difficulty or need for frequent cleaning, resulting in increased management costs, increased work difficulty, difficulty in fully utilizing the design performance, and reduced power generation efficiency. [0003] At present, there are three main ways to improve the stain resistance of the coating: 1. Reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/00H01L31/0216C03C17/23H02S40/10
CPCY02B10/10Y02E10/50
Inventor 罗志河张安杰陈丽丽张先宏张海银
Owner NORTH WEST YONGXIN GROUP
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