Titanium dioxide nano-porous coating and preparation method thereof

A nano-porous, titanium oxide technology, applied in coatings and other directions, can solve problems such as film cracking, achieve the effects of reducing the possibility of cracking, alleviating easy cracking, and uniform particle size distribution

Inactive Publication Date: 2019-11-01
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This superhydrophilic porous TiO 2 Although the film exhibits high light transmittance and superhydrophilicity, it has the disadvantage of cracking in the film as described in the article.

Method used

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  • Titanium dioxide nano-porous coating and preparation method thereof
  • Titanium dioxide nano-porous coating and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The concrete steps of preparation are:

[0043] Step 1: Firstly, according to the volume ratio of tetrabutyl titanate, ethanol, isopropanol and acetic acid as 1:1.8:1.2:0.3, the latter three are mixed and stirred, and tetrabutyl titanate is added thereto to obtain mixture. Then, according to the volume ratio of water, 65% nitric acid aqueous solution, ethanol and isopropanol in a volume ratio of 0.2:0.014:1.8:1.2, the four are mixed and stirred to obtain an acidic mixed aqueous solution.

[0044] Step 2: First, according to the volume ratio of the mixed solution and ethanol in the acidic mixed aqueous solution of 1:1, the mixed solution is dropped into the acidic mixed aqueous solution drop by drop to obtain a reaction precursor solution. Then the reaction precursor solution was placed at 55°C and stirred at a rate of 600r / min for 2.5h to obtain TiO 2 Sol.

[0045] Step 3, wait for TiO 2 After the sol was allowed to cool to room temperature, 4 wt % polyvinylpyrrolid...

Embodiment 2

[0048] The concrete steps of preparation are:

[0049]Step 1: Firstly, according to the volume ratio of tetrabutyl titanate, ethanol, isopropanol and acetic acid as 1:1.9:1.1:0.35, the latter three are mixed and stirred, and tetrabutyl titanate is added thereto to obtain mixture. Then, according to the volume ratio of water, 66% nitric acid aqueous solution, ethanol and isopropanol in a volume ratio of 0.2:0.014:1.9:1.1, the four are mixed and stirred to obtain an acidic mixed aqueous solution.

[0050] Step 2: First, according to the volume ratio of the mixed solution and ethanol in the acidic mixed aqueous solution of 1:1, the mixed solution is dropped into the acidic mixed aqueous solution drop by drop to obtain a reaction precursor solution. Then the reaction precursor solution was placed at 58°C and stirred at a rate of 600r / min for 2.3h to obtain TiO 2 Sol.

[0051] Step 3, wait for TiO 2 After the sol was allowed to cool to room temperature, 4.5 wt % polyvinylpyrrol...

Embodiment 3

[0054] The concrete steps of preparation are:

[0055] Step 1. First, according to the volume ratio of tetrabutyl titanate, ethanol, isopropanol and acetic acid as 1:2:1:0.4, the latter three are mixed and stirred, and tetrabutyl titanate is added thereto to obtain mixture. Then, according to the volume ratio of water, 66.5% nitric acid aqueous solution, ethanol and isopropanol in a volume ratio of 0.2:0.014:2:1, the four are mixed and stirred to obtain an acidic mixed aqueous solution.

[0056] Step 2: First, according to the volume ratio of the mixed solution and ethanol in the acidic mixed aqueous solution of 1:1, the mixed solution is dropped into the acidic mixed aqueous solution drop by drop to obtain a reaction precursor solution. Then the reaction precursor solution was placed at 60°C and stirred at a rate of 600r / min for 2h to obtain TiO 2 Sol.

[0057] Step 3, wait for TiO 2 After the sol was allowed to cool to room temperature, 5 wt % polyvinylpyrrolidone was ad...

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Abstract

The invention discloses a titanium dioxide nano-porous coating and a preparation method thereof. The coating comprises a TiO2 nanoparticle porous film which is coated on a substrate and has a thickness of 100-700 nm, wherein the particle size of TiO2 nanoparticles is 20-30 nm, and the diameter of pores in the porous film is 8-10 nm. The preparation method comprises the steps: adding a mixed liquiddropwise to an acidic mixed aqueous solution firstly, wherein the mixed liquid and the acidic mixed aqueous solution are prepared separately; and then performing stirring so as to obtain TiO2 sol, then adding polyvinylpyrrolidone to the TiO2 sol, performing stirring so as to obtain mixed sol, then adding ethanol to the mixed sol, performing dilution and aging so as to obtain coating sol, then immersing a substrate in the coating sol for dip coating, then performing airing, then putting the obtained coated substrate at 480-520 DEG C, performing heat preservation, and then performing cooling soas to obtain the desired product. The structure is reasonable, the film layer has no easy cracking, and the titanium dioxide nano-porous coating can be commercialized in super-hydrophilic and infrared absorption fields easily and widely.

Description

technical field [0001] The invention relates to a porous coating and a preparation method thereof, in particular to a titanium oxide nanoporous coating and a preparation method thereof. Background technique [0002] Titanium oxide coating is an important functional coating, which has a wide range of applications in superhydrophilicity, photocatalysis, or pollutant degradation. At present, the preparation of titanium oxide coatings mostly adopts the sol-gel method, such as "Preparation of superhydrophilic porous TiO 2 thin film". The porous TiO mentioned in this article 2 The film thickness and pore diameter of the thin film are both in micron order; the complexing agent used in the preparation method is ethylene glycol amine and acetylacetone. This superhydrophilic porous TiO 2 Although the film exhibits high light transmittance and superhydrophilicity, it has the disadvantage of cracking in the film as described in the text. Contents of the invention [0003] The tech...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/65
CPCC09D1/00C09D7/65
Inventor 许少辉费广涛魏永帅苑利钢魏磊
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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