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Effective water-collecting self-cleaning super-amphiphobic coating and preparation method thereof

A super-amphiphobic, self-cleaning technology, applied in the direction of coatings, antifouling/underwater coatings, primers, etc., can solve the problems of difficult preparation and application, poor self-cleaning and anti-oil properties, etc., to facilitate popularization and application, improve dew Droplet nucleation efficiency, the effect of simple equipment

Active Publication Date: 2019-07-23
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: In view of the above-mentioned problems in the prior art, such as difficulties in the preparation and application of water collection surfaces, poor self-cleaning and anti-oil properties, etc., the present invention provides a high-efficiency water-collecting self-cleaning superamphiphobic coating and its preparation method , the prepared coating surface not only has excellent condensation-enhanced dew condensation effect, good self-driving bouncing and desorption effect of water droplets, and efficient water mist collection effect, but also the entire coating surface exhibits superhydrophobic and superoleophobic properties. Amphiphobic properties, and exhibited excellent self-cleaning and anti-oil properties

Method used

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  • Effective water-collecting self-cleaning super-amphiphobic coating and preparation method thereof
  • Effective water-collecting self-cleaning super-amphiphobic coating and preparation method thereof
  • Effective water-collecting self-cleaning super-amphiphobic coating and preparation method thereof

Examples

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Embodiment 1

[0039] A method for preparing an efficient water-collecting self-cleaning superamphiphobic coating, the preparation process of which is as follows:

[0040] (1) Super amphiphobic topcoat preparation: 1 volume part of nano silica sol, 2 volume parts of 28 wt.% ammonia water, 6 volume parts of deionized water, 0.1 volume part of tetraethyl orthosilicate, 0.1 volume part of hydrophobic treatment agent Disperse in 60 parts by volume of absolute ethanol, and continuously mechanically stir at 100 rpm for 12 h to obtain a super amphiphobic topcoat, and the hydrophobic treatment agent is fluorosilane.

[0041] (2) Preparation of resin-coated particles: Select particles to be coated with a particle size of 3 μm. In this example, the particles to be coated are silicon carbide, and the shape of the silicon carbide particles is a conical structure with a bottom diameter of 5-50 μm , the angle at the top is 4-20°, and the particles are dispersed in absolute ethanol under the state of 100 r...

Embodiment 2

[0046] A method for preparing an efficient water-collecting self-cleaning superamphiphobic coating, the preparation process of which is as follows:

[0047] (1) Super amphiphobic topcoat preparation: 1 volume part of nano silica sol, 2 volume parts of 25 wt.% ammonia water, 6 volume parts of deionized water, 0.1 volume part of tetraethyl orthosilicate, 0.1 volume part of hydrophobic treatment agent Dispersed in 60 parts by volume of absolute ethanol, the hydrophobic treatment agent is fluorosilane, mechanically stirred at 100 rpm for 12 h to obtain a super amphiphobic topcoat;

[0048] (2) Polymer-coated particles: Select the particles to be coated with a particle size of 3-50 μm. In this example, the particles to be coated are molybdenum disulfide, and the shape of the particles is a three-dimensional triangular columnar structure. Disperse the particles in absolute ethanol to obtain a 0.3% mass ratio concentration solution, and then add a hydrophilic polymer to wrap the part...

Embodiment 3

[0052] A method for preparing an efficient water-collecting self-cleaning superamphiphobic coating, the preparation process of which is as follows:

[0053] (1) Superamphiphobic topcoat preparation: 15 parts by volume of nano-silica sol, 10 parts by volume of 28 wt.% ammonia water, 16 parts by volume of deionized water, 1 part by volume of tetraethyl orthosilicate, and 2 parts by volume of hydrophobic treatment agent Dispersed in 100 parts by volume of absolute ethanol, the hydrophobic treatment agent is fluorosilane, mechanically stirred at 300 rpm for 48 h to obtain a super amphiphobic topcoat;

[0054] (2) Polymer-coated particles: select the particles to be coated with a particle size of 3-50 μm, the particles to be coated are copper particles, and the shape of the particles is a pyramid-shaped structure, and the particles are dispersed under mechanical stirring at 300 rpm In absolute ethanol, obtain a 2% mass ratio concentration solution, then add a hydrophilic polymer to...

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Abstract

The invention relates to an effective water-collecting self-cleaning super-amphiphobic coating and a preparation method thereof and belongs to the field of preparation of ultra-infiltration functionalcoating materials. A multilevel micro-nano coarse structure coating layer with a combination of nanometer porous structure and hydrophilic microparticle structure is formed on the surface of the coating. The preparation method comprises the following steps: firstly, adding a chained aqueous silica sol after alkalization into a volatile organic solution, and then performing hydrophobic modification on the surface, thereby acquiring a super-amphiphobic finishing coat; coating micron particles with a hydrophilic polymer, hybridizing the micron particles with the super-amphiphobic finishing coat,coating on a bottom surface and drying, thereby acquiring a super-amphiphobic hybridized coating surface. The coating has an excellent condensation reinforcing dew formation effect, an excellent water drop self-repelling bouncing desorption effect and an efficient water mist collecting effect, has a super-hydrophobic and super-oleophobic super-amphiphobic characteristic, shows excellent self-cleaning and anti-oil properties, is widely applied to the fields of self-cleaning, water mist collection, desalination, condensation heat exchange, and the like, is simple in equipment and process, is easy for operation and is suitable for large-scale preparation and production.

Description

technical field [0001] The invention belongs to the technical field of preparation of super-wetting functional coating materials, and in particular relates to a high-efficiency water-collecting self-cleaning super-amphiphobic coating and a preparation method thereof. Background technique [0002] Superhydrophobicity on solid surfaces (contact angle > 150°, rolling angle < 10°) is a very common but very special type of superwetting phenomenon, such as superhydrophobic self-cleaning lotus leaves, superhydrophobic high-load water strider legs, Super-hydrophobic anti-fog mosquito eyes, etc. Inspired by this, constructing rough structures on the surface of materials by bionic means and modifying them with low surface energy, or directly constructing rough structures on the surface of low surface energy materials, is currently one of the important methods to obtain superhydrophobic surfaces. In recent years, with continuous breakthroughs in the application of superhydroph...

Claims

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Application Information

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IPC IPC(8): C09D5/16C09D127/14C09D133/04C09D183/04C09D7/62C09D7/61
CPCC09D4/00C09D5/002C09D5/1668C09D5/1675C09D5/1687C09D5/1693C09D127/14C08L33/04C08K7/26
Inventor 张友法汪希奎曾佳顾万诚余新泉
Owner SOUTHEAST UNIV
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