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Method for preparing self-healing super-hydrophobic coating by means of spraying technology

A super-hydrophobic coating and self-repairing technology, which is applied in coatings, devices for coating liquid on the surface, etc., to achieve good self-cleaning effects

Inactive Publication Date: 2012-08-22
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for artificial superhydrophobic surfaces, in order to restore the damaged superhydrophobicity, it is necessary to re-spray it with low surface energy materials, or even replace the superhydrophobic coating, resulting in additional expenditure and human labor.

Method used

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  • Method for preparing self-healing super-hydrophobic coating by means of spraying technology
  • Method for preparing self-healing super-hydrophobic coating by means of spraying technology
  • Method for preparing self-healing super-hydrophobic coating by means of spraying technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Treatment of the substrate:

[0030] Spray the silicon wafer with ethanol and distilled water for 10 minutes in order to remove various impurities (grease and dirt) attached to the surface of the substrate, and dry it naturally for use.

[0031] (2) Preparation of solution:

[0032] Mix the deionized aqueous solution of sulfonated polyaniline with a concentration of 1 mg / mL and the deionized aqueous solution of polydimethyldiallylamine hydrochloride with a concentration of 1 mg / mL to prepare complex solution I, in which the sulfonated polyaniline The molar ratio of the monomer to polydimethyldipropylene amine hydrochloride is 1:1; polyacrylic acid is dissolved in deionized water to prepare solution II with a concentration of 1mg / mL; sodium dodecylsulfonate Dissolve in deionized water to prepare a solution with a concentration of 2mg / mL, and dissolve tetrahydroperfluorooctyltrimethylsilane in toluene to prepare a solution with a concentration of 5mg / mL;

[0033] (3...

Embodiment 2

[0039] (1) Treatment of the substrate:

[0040] Spray the aluminum sheet with ethanol and distilled water for 10 minutes in order to remove various impurities (grease and dirt) attached to the surface of the substrate, and dry it naturally for use.

[0041] (2) Preparation of solution:

[0042] Mix the sulfonated polyetheretherketone solution with a concentration of 2mg / mL and the solution of polypropyleneamine with a concentration of 4mg / mL to prepare a complex solution I, wherein the monomer molar ratio of sulfonated polyether ether ketone to polypropyleneamine is 1:10; Dissolve polymethacrylic acid in deionized water to prepare solution II with a concentration of 4mg / mL; dissolve lithium perfluorooctane sulfonate in deionized water to prepare a solution with a concentration of 3mg / mL, Dissolve tetrahydroperfluorodecyltrimethylsilane in toluene to prepare a solution with a concentration of 1 mg / mL;

[0043] (3) Preparation of porous coating:

[0044]Spray the solution I a...

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Abstract

The invention belongs to the technical field of self-healing and super-hydrophobic coating preparations and specifically relates to a method for preparing a self-healing super-hydrophobic coating by means of a spraying technology. The method includes three steps of processing a base, preparing a polymer coating solution and preparing a super-hydrophobic coating. According to the method for preparing the self-healing super-hydrophobic coating by means of the spraying technology, the prepared super-hydrophobic coating with a contact angle larger than 150 degrees and a roll angle smaller than 5 degrees is good in self-cleaning, and capable of effectively prolonging the service life; when low surface energy materials on the coating surface are decomposed by ultraviolet rays or acid rain, or even scraped away by outside forces, low surface energy molecules inside the coating can be automatically permeated out for healing damaged super-hydrophobic surfaces.

Description

technical field [0001] The invention belongs to the technical field of self-healing and superhydrophobic coating preparation, and in particular relates to a method for preparing a self-healing superhydrophobic coating by using a spraying technology. Background technique [0002] The superhydrophobic phenomenon is very widespread in nature, and many plants, animals, and insects have superhydrophobic surfaces. A superhydrophobic surface generally refers to a surface with a contact angle greater than 150° and a rolling angle less than 10°. Scientific research shows that the superhydrophobic property is determined by the two factors of rough surface structure and low surface energy. The superhydrophobic surface has many unique surface characteristics: such as self-cleaning, anti-fouling, hydrophobicity, etc., making it have great application prospects in the fields of life and production. [0003] However, in the natural environment, the super-hydrophobic surface is easily dam...

Claims

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Application Information

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IPC IPC(8): B05D1/02B05D1/36C09D125/18C09D161/16C09D179/02C09D139/00C09D133/02C09D7/12
Inventor 孙俊奇李洋
Owner JILIN UNIV
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