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Fluorosilicone resin based on click chemistry and preparation method of self-repairing superhydrophobic coating

A super-hydrophobic coating, fluorosilicone resin technology, used in coatings, polyurea/polyurethane coatings, devices for coating liquids on surfaces, etc., can solve the problems of etching loss, short repair cycle, and long repair time , to achieve high mechanical strength and overcome the effect of long migration time

Active Publication Date: 2018-01-09
NORTHWESTERN POLYTECHNICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low surface energy free molecules inside most coatings will be lost in a large amount when they are damaged by abrasion and etching, which leads to problems such as short repair cycle and long repair time in the self-repair function, especially for super-amphiphobic coatings. obvious

Method used

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  • Fluorosilicone resin based on click chemistry and preparation method of self-repairing superhydrophobic coating
  • Fluorosilicone resin based on click chemistry and preparation method of self-repairing superhydrophobic coating
  • Fluorosilicone resin based on click chemistry and preparation method of self-repairing superhydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: PET fiber substrate

[0030] (1) Surface pretreatment: Put the PET fiber substrate into an ethanol solution for ultrasonic cleaning, remove impurities such as grease and dust on the surface, use an ethanol solution with a mass concentration of 80%, take it out and dry it naturally;

[0031] (2) Primer solution configuration: ultrasonically disperse 10 g of fluorinated silica nanoparticles and 5 g of two-component polyurethane adhesive in 30 g of acetone to obtain a polyurethane composite primer solution;

[0032] (3) Topcoat solution configuration: blend 5g of multifunctional fluorosilicone resin and 0.25g of butyl titanate curing agent into 50g of acetone to obtain fluorosilicone resin topcoat solution; wherein the multifunctional fluorosilicone resin preparation step As follows: under nitrogen protection, add 1mol pentaerythritol tetramercapto propionate, 2mol methacrylmethoxysilane, 2mol perfluorooctyl ethyl acrylate and 0.01mol triphenylphosphine alkal...

Embodiment 2

[0036] Embodiment 2: aluminum alloy base material

[0037] (1) Surface pretreatment: Use sandpaper to quickly polish the surface of the aluminum substrate, then put it into an ethanol solution for ultrasonic cleaning, remove surface grease, dust and other impurities, use an ethanol solution with a mass concentration of 80%, take it out and dry it naturally ;

[0038] (2) Primer solution configuration: ultrasonically disperse 10 g of fluorinated titanium dioxide nanoparticles and 10 g of polyurethane adhesive in 100 g of N,N-dimethylacetamide to obtain a polyurethane composite primer solution;

[0039] (3) Topcoat solution configuration: blend 5g of multifunctional fluorosilicone resin and 0.5g of stannous octoate curing agent in 100g of acetone to obtain fluorosilicone resin topcoat solution; wherein the preparation steps of the multifunctional fluorosilicone resin are as follows : Under nitrogen protection, add 1mol dipentaerythritol hexamercaptopropionate, 3mol methacrylmet...

Embodiment 3

[0043] Example 3: Glass substrate

[0044] (1) Surface pretreatment: put the glass base material into an ethanol solution for ultrasonic cleaning, remove impurities such as grease and dust on the surface, use an ethanol solution with a mass concentration of 80%, take it out and dry it naturally;

[0045] (2) ultrasonically disperse 10 g of fluorinated kaolin micro-nano particles and 5 g of polyurethane adhesive in 50 g of N,N-methylpyrrolidone to obtain a polyurethane composite primer solution;

[0046] (3) Topcoat solution configuration: Blend 5g of multifunctional fluorosilicone resin and 0.35g of γ-aminopropyltriethoxysilane curing agent with 100g of acetone to obtain a fluorine-containing silicone resin topcoat solution; The preparation steps of fluorosilicone resin are as follows: under nitrogen protection, 1mol isocyanuric acid trimercapto carboxylate, 2mol methacryloylmethoxysilane, 1mol perfluorooctyl ethyl acrylate and 0.0075mol Triethylenetetramine base catalyst, ca...

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Abstract

The invention relates to fluorosilicone resin based on click chemistry and a preparation method of a self-repairing superhydrophobic coating. Through click chemistry, low surface energy and a self-repairing function are led into a multi-level rough structure of nanoparticles fixed by a polyurethane adhesive, and the superhydrophobic / amphiphobic interfacial material with high mechanical strength and the self-repairing function is prepared. As a self-designed low-surface-energy segmental grid structure of polyfunctional fluoroalkyl silane is adopted, by use of the principle that a damaged surface is covered with self-repairing segmental orientation, the defects that low-surface-energy molecules in a conventional self-repairing material are long in migration time and high in probability of loss are overcome, and a new method is provided for realizing quick and long-acting self-repairing of the superhydrophobic coating.

Description

technical field [0001] The invention belongs to the field of superhydrophobic materials, and relates to a method for preparing a fluorosilicone resin based on click chemistry and a self-repairing superhydrophobic coating. Rapidly restores the hydrophobicity of damaged areas in a short period of time. Background technique [0002] The superamphiphobic surface has both superhydrophobic and superoleophobic properties. Because of its unique "repelling" characteristics, it can be used in self-cleaning, anti-fouling, drag reduction, anti-fog, anti-icing, corrosion resistance, oil-water separation, fluid It has broad application prospects in the fields of drag reduction and biomedicine. In recent years, it has attracted extensive attention of researchers. According to the Wenzel-Cassie theory, rough surface structure and low surface energy are the keys to fabricate superhydrophobic / amphiphobic surfaces. Due to the large number of internal pore structures and low surface energy c...

Claims

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Application Information

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IPC IPC(8): C08G77/24C09D183/08C09D175/04C09D7/62C09D7/61C03C17/00B05D7/02B05D7/14
Inventor 张秋禹张浩张宝亮张和鹏
Owner NORTHWESTERN POLYTECHNICAL UNIV
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