Nanometer TiO2 photocatalysis self-cleaning coating suitable for background colors of building walls and preparation method thereof

A technology for self-cleaning coatings and building walls, applied in coatings, metal material coating processes, fusion spraying, etc., can solve problems such as difficult matching, limited use range, single color, etc., and achieve good combination and high ratio Surface area, reducing the effect of the spray granulation process

Inactive Publication Date: 2015-07-15
郴州市泰益表面涂层技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the excellent photocatalytic properties of TiO 2 The color itself is pure white powder with a single color, while the color of the building wall is rich and colorful. The two are not easy to match, which limits its scope of use.

Method used

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  • Nanometer TiO2 photocatalysis self-cleaning coating suitable for background colors of building walls and preparation method thereof
  • Nanometer TiO2 photocatalysis self-cleaning coating suitable for background colors of building walls and preparation method thereof
  • Nanometer TiO2 photocatalysis self-cleaning coating suitable for background colors of building walls and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] In this embodiment, the substrate material is a 316L stainless steel sheet with a thickness of about 2 mm, and the nano-TiO on the surface of the substrate 2 The thickness of the coating is 40 μm, and the TiO 2 The crystal phase components are anatase phase and rutile phase. According to the mass fraction, the anatase type accounts for 80%. The coating is well combined with the substrate, and the coating surface has a porous micro-nano structure. The concrete preparation method of this coating is as follows:

[0035] 1. Mix deionized water and absolute ethanol at a volume ratio of 4:1 to make a solution, add commercially available P25 nano-powder with an average particle size of 20 nm to the above prepared solution at 3 wt%, and stir magnetically to mix evenly. Add water-based polyurethane solution PU, polyvinylpyrrolidone PVP and gray color modifier to the above-mentioned mixed solution at 0.7 wt%, 0.13 wt% and 0.3 wt%, respectively, and magnetically stir to mix evenl...

Embodiment 2

[0043] In the present embodiment, the substrate material is a 316L stainless steel sheet with a thickness of about 2mm, and the nano-TiO2 coating on the surface of the substrate has a thickness of 50 μm, and in this coating, the TiO 2 The crystal phase components are anatase phase and rutile phase. According to the mass fraction, the anatase type accounts for 80%. The coating is well combined with the substrate, and the coating surface has a porous micro-nano structure. The concrete preparation method of this coating is as follows:

[0044] 1. Mix deionized water and absolute ethanol at a volume ratio of 1:1 to form a solution, add commercially available P25 nano-powder with an average particle size of 20nm at 5 wt% to the above prepared solution, and magnetically stir to mix evenly. Water-based polyurethane solution PU, polyvinylpyrrolidone PVP and gray color modifier are added to the above-mentioned mixed solution at 0.6 wt%, 0.2 wt% and 0.5 wt%, respectively, and magnetical...

Embodiment 3

[0052] In the present embodiment, the substrate material is a 316L stainless steel sheet with a thickness of about 2 mm, and the nano-TiO on the surface of the substrate 2 The thickness of the coating is 20 μm, and the TiO in the coating 2 The crystal phase components are anatase phase and rutile phase. According to the mass fraction, the anatase type accounts for 80%. The coating is well combined with the substrate, and the coating surface has a porous micro-nano structure. The TiO 2 The specific preparation method of the coating is as follows:

[0053] 1. Mix deionized water and absolute ethanol at a volume ratio of 1:1 to make a solution, add commercially available P25 nano-powder with an average particle size of 20nm at 5wt% into the above prepared solution, stir and mix evenly, and mix the water-based Polyurethane solution PU and orange color modifier are added to the above-mentioned mixed solution at 1.2wt% and 0.4wt% respectively, and magnetically stirred to mix evenl...

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Abstract

The invention discloses nanometer TiO2 photocatalysis self-cleaning coating suitable for background colors of building walls and a preparation method thereof. The thickness of the coating is 10-50 micrometers, the crystal form of nanometer TiO2 in the coating is a mixed crystal form, the weight ratio of P25 powder anatase to rutile is 4:1, and a color modifier is inorganic light resistant weather-proof dye. The coating has the characteristics of being suitable for different background colors of the building walls and having the photocatalysis self-cleaning property. The preparation method is characterized in that a P25 liquid material for modifying colors is fed into thermal spraying flame by adopting a liquid material thermal spraying method and a self-made liquid material conveying device so as to prepare the coating. Compared with TiO2 coating obtained by adopting a conventional thermal spraying method, the nanometer TiO2 photocatalysis self-cleaning coating has different modifying colors and good adhesive force and is suitable for different background colors and service lives of the building walls; and as the coating is of a porous micro-nano structure, the photocatalysis self-cleaning function can be exerted favorably, and therefore the nanometer TiO2 photocatalysis self-cleaning coating has important application value and social and economic benefits.

Description

technical field [0001] The invention relates to a kind of nano TiO which can adapt to the background color of building walls 2 The photocatalytic self-cleaning coating also relates to a preparation method of the coating. Background technique [0002] In today's environment that advocates environmental friendliness, low-carbon economy, energy saving and emission reduction, with the improvement of people's living standards, higher requirements are put forward for building exterior walls, which gradually make them more environmentally friendly, highly decorative and functional. The direction of development, the development of high-quality coatings for building exterior walls has become an important topic in the development of the current building exterior wall industry. At the same time, the pollutants in the air are increasing day by day, and many pollutants are easy to adhere to the surface of buildings. The use of self-cleaning coatings can effectively inhibit this phenomen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/12C23C4/10C23C4/12C23C4/11C23C4/129
Inventor 李华单张飞黄晶
Owner 郴州市泰益表面涂层技术有限公司
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