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A durable superhydrophobic coating and preparation method thereof

A super-hydrophobic coating, durable technology, used in coatings, antifouling/underwater coatings, devices for coating liquids on surfaces, etc. , Improve the degree of adhesion, the effect of good bonding force

Active Publication Date: 2019-12-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem to be solved: In order to solve the technical problem that the superhydrophobic surface is not wear-resistant, the present invention provides a durable superhydrophobic coating and its preparation method

Method used

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  • A durable superhydrophobic coating and preparation method thereof
  • A durable superhydrophobic coating and preparation method thereof
  • A durable superhydrophobic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Under the condition of stirring at a low speed of 400rpm, 0.6 parts of hydrophobic micro-nano titanium dioxide particles, 3 parts of FEVE resin and 0.7 parts of hexamethylene diisocyanate trimer curing agent were successively added to 10 parts of butyl acetate solution, and stirred at a high speed of 1500 rpm for 10 minutes. After ultrasonic dispersion for 5 minutes, the obtained coating was brushed on the surface of the glass sheet and cured at room temperature for 24 hours. The water contact angle was 146.5° and the rolling angle was 23.1°. figure 1 Optical photograph of the water drop contact angle of the obtained coating, figure 2 Scanning electron micrograph of the coating.

Embodiment 2

[0024] Under the condition of 500rpm low-speed stirring, add 1.5 parts of hydrophobic micro-nano fumed silica particles, 6 parts of FEVE resin and 1 part of hexamethylene diisocyanate trimer curing agent to 20 parts of butyl acetate solution, 1500rpm high speed Stir for 15 minutes, then ultrasonically disperse for 10 minutes, brush the obtained paint on the surface of the glass sheet, and obtain several samples. Take out a part of the sample without soaking, and dry it at room temperature for 24 hours to completely cure. Take the remaining sample and dry it at room temperature for 16 hours to reach a semi-cured state. Add 1 part of hexamethylene diisocyanate trimer curing agent to 20 parts of butyl acetate solution, ultrasonically disperse for 10 minutes to mix evenly, and prepare soaking solution. Let the semi-cured coating be immersed in the immersion solution for 30 minutes, take it out and dry it at room temperature for 24 hours to completely cure. The water contact angl...

Embodiment 3

[0026] Under the condition of 500rpm low-speed stirring, 1 part of hydrophobic carbon nanotube particles, 4 parts of FEVE resin and 0.8 part of hexamethylene diisocyanate trimer curing agent were successively added to 15 parts of butyl acetate solution, and 1800 rpm was stirred at high speed for 10 minutes. Then ultrasonically disperse for 10 minutes, brush the resulting paint on the surface of the glass sheet, and dry it at room temperature for 20 hours to make it semi-cured. Add 0.5 parts of hexamethylene diisocyanate trimer curing agent to 20 parts of butyl acetate solution, ultrasonically disperse for 15 minutes to mix evenly, and prepare soaking solution. Let the semi-cured coating be immersed in the soaking solution for 60 minutes, take it out and dry it at room temperature for 24 hours to completely cure. The water contact angle of the obtained coating is 159.4°, and the rolling angle is 1.0°.

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Abstract

The invention relates to a durable super-hydrophobic coating and a preparation method thereof. The preparation method comprises the following steps: 1) hybrid paint preparation: under low-speed mechanical stirring condition, adding micro nano particles, hydrophobic resin and a curing agent in a volatile organic solvent successively, performing high speed stirring and then ultrasonic dispersion to obtain the hybrid paint; 2) coating semi-solidification: coating the surface of a base material with the hybrid paint and performing semi-solidification; and 3) complete solidification: immersing the semi-solidified coating in a mixed immersion solution of the curing agent and the volatile organic solvent, taking the coating out, and drying the coating to obtain the durable super-hydrophobic coating having good wear resistance. The preparation method has no special requirement for a substrate material and its shape, the coating is suitable for various common base material surfaces such as metal, glass, timber and concrete, the equipment is simple, operation is easy, the cost is low, large-area construction is realized, and the coating has large application value on super-hydrophobic fields of self-cleaning, anticorrosion, mildew resistance, ice and frost resistance, and oil-water separation.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of coatings, and in particular relates to a durable superhydrophobic coating and a preparation method thereof. Background technique [0002] A superhydrophobic surface refers to a surface with a contact angle with water droplets greater than 150° and a roll angle less than 10°. Since the discovery of the "lotus leaf effect", superhydrophobic surfaces have been widely used in fields such as self-cleaning, anti-corrosion and anti-mildew, anti-icing and anti-frost, and oil-water separation. The traditional superhydrophobic surface preparation method is mainly to construct micro-nano rough structure on the surface of the substrate by bionic means, and modify it with low surface energy substances, or directly construct a rough structure on the surface of low surface energy materials. These methods have higher requirements on substrate materials, more complicated process equipment, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/12C09D5/16C09D5/14C09D7/61B05D5/00B05D5/08B05D7/24B05D3/04B05D3/10
CPCB05D3/0406B05D3/108B05D5/00B05D5/08B05D5/083B05D7/24B05D2506/10B05D2518/10B05D2601/20B05D2601/22B05D2601/24C08K3/36C08K7/24C08K2003/2241C08K2201/011C09D5/14C09D5/1618C09D127/12B05D2401/10
Inventor 张友法张丽清肖振余新泉
Owner SOUTHEAST UNIV
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