Preparation method of self-repairing super hydrophobic coating

A super-hydrophobic coating, self-healing technology, applied in the direction of cleaning methods, coatings, chemical instruments and methods using liquids, etc., to achieve the effects of easy availability of raw materials, simple process, and good self-cleaning properties

Inactive Publication Date: 2010-08-04
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for artificial super-hydrophobic surfaces, in order to restore the damaged super-hydrophobicity, it is necessary to re-spray the material of the ground surface energy, or even replace the super-hydrophobic coating, resulting in additional expenditure and human labor.

Method used

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  • Preparation method of self-repairing super hydrophobic coating
  • Preparation method of self-repairing super hydrophobic coating
  • Preparation method of self-repairing super hydrophobic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Treatment of the substrate:

[0029] The silicon wafer was ultrasonically treated with ethanol and distilled water for 10 minutes respectively to remove various impurities (grease and dirt) attached to the surface of the substrate, and then dried with nitrogen gas for use.

[0030] (2) Preparation of solution:

[0031] Pour 50mL, 0.2mg / mL deionized aqueous solution of sulfonated polyaniline into 50mL, 0.4mg / mL deionized aqueous solution of polydimethyldiallylamine hydrochloride to prepare a complex solution for use; then Dissolve 0.4g of polyacrylic acid in 100mL of deionized water, and dissolve evenly before use.

[0032] (3) Preparation of micro-nano composite surface:

[0033] Soak the silicon chip processed in step (1) in the deionized aqueous solution of polyacrylic acid prepared in step (2) for 10 minutes, take out and rinse with deionized water; then prepare the composite solution in step (2) Soak in water for 10 minutes, take it out and rinse it with deio...

Embodiment 2

[0040] (1) Treatment of the substrate:

[0041] The aluminum sheet was ultrasonically treated with ethanol and distilled water for 10 minutes respectively to remove various impurities attached to the surface of the substrate, and then dried with nitrogen gas for use.

[0042] (2) Preparation of solution:

[0043] Pour 100mL, 0.4mg / mL deionized aqueous solution of sulfonated polyaniline into 50mL, 1mg / mL deionized aqueous solution of polydimethyldiallylamine hydrochloride to prepare a complex solution, ready for use; Then dissolve 0.4g of polymethacrylic acid in 100mL of deionized water, dissolve evenly and set aside.

[0044] (3) Preparation of micro-nano composite surface:

[0045] Soak the aluminum sheet processed in the step (1) in the polymethacrylic acid solution prepared in the step (2) for 5 minutes, take out and wash it; then soak it in the composite solution prepared in the step (2) for 5 minutes, Take it out and wash it with water; repeat the above process 15 time...

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Abstract

The invention belongs to the technical field of self-repairing super hydrophobic coating preparation, in particular to a method for preparing a super hydrophobic coating with functions of self repairing and self cleaning. The invention comprises the following steps: treating a base, preparing a solution, assembling a micro-nano composite structure, heat treating a coating, decorating hydrophobic substances and the like. The method is not limited by the size and the shape of the base, thereby being suitable for planar bases, cambered bases and bases with irregular surfaces. The contact angle of the prepared super hydrophobic coating is larger than 150 degrees, and the rolling angle is smaller than 5 degrees. A process used by the invention has simple method, available materials and low cost; once low surface energy substances on the surface of the coating are decomposed by ultraviolet rays or acid rain or even blown away by an external force, low surface energy molecules in the coating can spontaneously permeate out to repair the damaged super hydrophobic surface. The invention provides a novel method for prolonging the service life of the super hydrophobic surface.

Description

technical field [0001] The invention belongs to the technical field of self-repair and super-hydrophobic coating preparation, and specifically introduces the bionic self-repair function into the super-hydrophobic coating, and provides a preparation of a self-repairing super-hydrophobic coating that can prolong the service life of the super-hydrophobic coating method. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/02B05D7/24B05D3/02B08B3/12
Inventor 孙俊奇李洋
Owner JILIN UNIV
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