In-situ regulated and controlled water-based super-amphiphobic coating layers and preparation method thereof

A super-amphiphobic, coating technology, used in coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of complex preparation and hinder the flipping of surface active molecular chains, and achieve easy availability of raw materials and low cost. Low, simple process effect

Active Publication Date: 2020-10-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Technical problem to be solved: In view of the problem of using organic solvents or high temperature sintering in the existing super-amphiphobic material preparation technology, as well as the complicated preparation of layer-by-layer in-situ spraying technology, the present invention provides an in-situ regulated water-based super-amphiphobic Coating and its preparation method. This method is to partially modify the particles wrapped by surface activity, mainly to induce the fluorocarbon chain to align outward, and prevent the surface activity molecular chain from turning back after deposition, which can be prepared more quickly. The method has simple equipment and process, simple operation and low cost

Method used

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  • In-situ regulated and controlled water-based super-amphiphobic coating layers and preparation method thereof
  • In-situ regulated and controlled water-based super-amphiphobic coating layers and preparation method thereof
  • In-situ regulated and controlled water-based super-amphiphobic coating layers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Disperse 15g of carboxylic acid-based fluorosurfactant Capstone FS-61 and 10g of silica particles with a maximum dimension of 7-40nm in 300g of water, stir mechanically for 30min until uniform, add 15g of water-based polyurethane film-forming agent, add 1.65g of disperse Sodium dodecylbenzene sulfonate and 1.65g thickener sodium polyacrylate were ultrasonically dispersed for 10 minutes, dispersed uniformly and then sprayed on the surface of the substrate to obtain the initial surface ( figure 1 : a). The initial surface is superhydrophilic and superoleophobic, and the static contact angle of water droplets is 0°( figure 1 : b), the static contact angle of the oil droplet is 152.7° ( figure 1 : c), the rolling angle is 8°; then it is 0.4mg / m at 80℃ 3 After being regulated in the atmosphere of heptadecafluorodecyltriethoxysilane for 15 minutes, the fluoroalkyl group is oriented outward, and a superamphiphobic material is obtained, and the coating is superamphiphobic ( ...

Embodiment 2

[0031]Disperse 10g of phosphoric acid-based fluorosurfactant Zonyl 9361 and 10g of sludge powder particles with a maximum dimension of 10-60μm in 300g of water, stir mechanically for 30min until uniform, add 15g of water-based acrylic film-forming agent, and add 1g of dispersant polysorbate (Tween) and 1.5g thickener polyvinylpyrrolidone, ultrasonically dispersed for 10min, evenly dispersed, brushed on the surface of the substrate, and dried naturally in the air for 2h to obtain the initial surface. The initial surface is superhydrophilic and superoleophobic, the static contact angle of water droplets is 0°, the static contact angle of oil droplets is 152.7°, and the rolling angle is 8°; 3 After being regulated in the ethanol atmosphere for 15 minutes, the halothane group is oriented outward, and the superamphiphobic material is obtained. The coating is superamphiphobic. The static contact angle of water droplets is 159°, the rolling angle is 3°, and the static contact angle of...

Embodiment 3

[0033] 150g of carboxylic acid-based fluorosurfactant FS-61 and 90g of TiO2 with the largest dimension of 200nm 2 Disperse the particles in 3000g water, stir mechanically for 60min until uniform, add 150g water-based polybutadiene resin film-forming agent, add 10g dispersant fatty acid sorbitan (Span) and 15g thickener polyacrylate copolymer emulsion, ultrasonically disperse for 10min, Dip coating on the surface of the substrate after uniform dispersion to obtain the initial surface, the initial surface is super-hydrophilic and super-oleophobic, the static contact angle of water droplets is 0°, the static contact angle of oil droplets is 150.7°, and the rolling angle is 10°; At ℃, 0.1mg / m 3 After being regulated in the acetone atmosphere for 7 minutes, the halothane group is oriented outward, and the superamphiphobic material is obtained. The coating is superamphiphobic. The static contact angle of water droplets is 157°, the rolling angle is 7°, and the static contact angle o...

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Abstract

The invention discloses in-situ regulated and controlled water-based super-amphiphobic coating layers and a preparation method thereof, and belongs to the field of new chemical materials. A fluorine-containing surfactant, micro-nano particles, film-forming resin, a dispersing agent, a thickening agent and water are uniformly stirred and dispersed, then the surface of a substrate is coated with themixture by adopting technologies such as spraying, dip-coating or brush-coating, and the orientation of groups in the coating layer is regulated and controlled in an organic atmosphere, so that the coating layers with different wettability are obtained. The method is simple in equipment and process, easy to operate and low in cost. The prepared coating layers with adjustable wettability has the advantages of being controllable in wettability and elasticity, environmentally friendly, good in weather resistance and the like, and can be applied to various fields of buildings, ships, naval vessels, aircrafts, automobiles, high-speed rails, wind driven generators and the like.

Description

technical field [0001] The invention belongs to the field of new chemical materials, and in particular relates to an in-situ regulated water-based super-amphiphobic coating and a preparation method thereof. Background technique [0002] Superamphiphobic surfaces with superhydrophobic and superoleophobic properties have attracted extensive attention and a large number of preparation techniques have been developed. However, in the preparation process of super-amphiphobic materials with super-oleophobic properties, in order to ensure their excellent oleophobic effect, the use of long-chain fluorine-containing substances with 8 carbons or more and a large amount of organic solvents has caused great harm to human health and the living environment. Big threat and high cost are the main factors restricting its development. Fluorosurfactant is a special substance containing both polar hydrophilic groups and non-polar hydrophobic groups. The presence of polar hydrophilic groups ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/62C09D7/40C09D175/08C09D7/61C09D133/04C09D147/00C09D161/06C09D163/00
CPCC08K2003/2241C08K2201/011C09D5/002C09D133/04C09D147/00C09D161/06C09D163/00C09D175/04C09D175/08C09D7/40C09D7/61C09D7/62C08K9/10C08K3/36C08K11/005C08K3/22C08K3/28C08K7/26
Inventor 张友法刘平余新泉
Owner SOUTHEAST UNIV
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