Nano-sol for forming anti-aging and stain-resistant nano-coating and preparation method and application thereof

Abstract

The invention discloses nano-sol for forming an anti-aging and stain-resistant nano-coating and a preparation method thereof. The nano-sol for forming the anti-aging and stain-resistant nano-coating comprises the following components in percentage by weight: 0.1-10% of nano-TiO2 sol, 0.1-20% of sodium silicate, 0.1-5% of cerium oxide sol, 0-0.1% of colorant and the balance of water or mixed solution consisting of ethanol and water. The preparation method comprises the steps of firstly preparing the nano-TiO2 sol by adopting a sol-gel method, then preparing the Ce2O3 sol, then adding sodium silicate and the Ce2O3 sol into the nano-TiO2 sol, uniformly stirring, further adding the colorant, and finally adding the balance of water or the mixed solution consisting of ethanol and water to obtain the nano-sol for forming the anti-aging and stain-resistant nano-coating. The nano-coating which is used for a color-coated plate and obtained by coating has the properties of aging resistance, stain resistance, corrosion resistance and the like, and the service life of the color-coated plate can be prolonged.

Description

technical field [0001] The invention relates to a nano sol for forming an anti-aging and stain-resistant nano-coating, a preparation method thereof and its application in forming an anti-aging and stain-resistant nano-coating, belonging to the field of nano functional materials and environmental protection materials. Background technique [0002] Pre-painted steel sheet is a new type of strip steel pre-coated product that has been developed rapidly in the world in the past 30 years. It has decorative, formable, and corrosion-resistant properties. Materials (wall materials, ceiling materials, partitions, fire doors) and building accessories (window panels, signboards, home appliances), etc. However, in industrial areas, coastal areas or areas with severe smog, due to the action of soot particles, sulfur dioxide gas or salt in the air, the color coating on the surface of the color-coated board is severely corroded and aged. Especially in the case of strong sunlight, pollutant...

AI Technical Summary

Problems solved by technology

But TiO 2 There are many problems in the use of self-cleaning coatings: (1) The substrate coated with titanium dioxide sol needs to be heat-treated to prepare stable crystal form of TiO 2 , and improve the bonding force between the coating and the substrate

This method is not suitable for substrates that cannot be heat-treated at high temperatures, such as color-coated plates

At the same time, the heat treatment process increases energy consumption and increases production costs; (2) Light conditions directly affect the TiO 2 The catalytic effect and hydrophilicity of the coating; (3) dust or non-volatile substances will penetrate into the gaps on the surface of the paint film, making the durability unsatisfactory; (4) due to Ti0 2 The particles are small, easy to agglomerate in aqueous solution, and the crystal form is unstable, which affects its activity and faces great difficulties in the practical process

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