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Superhydrophobic composite coating with self-repair function and preparation method thereof

A composite coating, super-hydrophobic technology, applied in coatings and other directions, can solve the problems of low mechanical strength of self-healing super-hydrophobic coatings, and achieve the effects of improving mechanical strength, increasing storage capacity, and increasing adsorption capacity

Active Publication Date: 2015-11-11
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a superhydrophobic composite coating with self-repairing function, thereby solving the problem of low mechanical strength of the existing self-repairing superhydrophobic coating, and simultaneously providing a preparation method of the coating

Method used

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  • Superhydrophobic composite coating with self-repair function and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Metal substrate surface pretreatment:

[0035] Use sandpaper to quickly polish the surface of the aluminum substrate and put it into an ethanol solution for ultrasonic cleaning to remove impurities such as grease and dust on the surface. Use an ethanol solution with a mass concentration of 80%, take it out and dry it naturally, and save it for later use;

[0036] (2) Preparation of superhydrophobic and oleophobic emulsion:

[0037] 10 parts of ammonia water and 10 parts of graphene are uniformly dispersed in 100 parts of organic solvent, and 10 parts of tetraethylorthosilicate are added to the above-mentioned mixed solution of graphene and ammonia water at a rate of 0.1 mL / min to prepare a sol solution. Then add 90 parts of polyvinylidene fluoride (PVDF) and 3 parts of low surface energy modifier to carry out magnetic stirring. Finally, 7 parts of ammonium bisulfate dissolved in 15 parts of deionized water was mixed with the above solution at a dropping rate of 1 ...

Embodiment 2

[0052] (1) Surface pretreatment of metal pipelines:

[0053] The surface of the metal tube is treated by sandblasting, and then put into an ethanol solution for ultrasonic cleaning to remove impurities such as grease and dust on the surface. The concentration of the ethanol solution is 95%, take it out and dry it naturally;

[0054] (2) Preparation of superhydrophobic and oleophobic emulsion:

[0055] 12 parts of ammonia water and 15 parts of graphene were uniformly dispersed in 80 parts of ethanol solvent, and 12 parts of tetrabutyl titanate were added to the above mixed solution of graphene and ammonia water at a rate of 0.4 mL / min to prepare a sol solution . Add 75 parts of polyphenylene sulfide (PPS) and 4 parts of low surface energy modifier to carry out magnetic stirring. Finally, 5 parts of ammonium bicarbonate dissolved in 15 parts of deionized water was mixed with the above solution at a dropping rate of 1 mL / min to obtain a superhydrophobic coating emulsion. The op...

Embodiment 3

[0065] (1) Surface pretreatment of metal pipelines:

[0066] Use sandblasting to treat the surface of the metal pipeline, put it into an ethanol solution for ultrasonic cleaning to remove impurities such as grease and dust on the surface, the concentration of the ethanol solution is 90%, take it out and dry it naturally, and save it for later use;

[0067] (2) Preparation of superhydrophobic and oleophobic emulsion: 20 parts of ammonia water and 20 parts of graphene were uniformly dispersed in 90 parts of ethanol solvent, and 20 parts of tetrabutyl titanate were added to the above graphene and In the mixed solution of ammonia water, a sol solution was prepared. Then add 40 parts of perfluorosiloxane resin, 45 parts of perfluoroethylene propylene copolymer (FEP) and 5 parts of low surface energy modifier to carry out magnetic stirring. Finally, 6 parts of ammonium carbonate dissolved in 20 parts of deionized water was mixed with the above solution at a dropping rate of 2 mL / mi...

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Abstract

The invention relates to a superhydrophobic composite coating with self-repair function, which solves the problem of low mechanical strength in the existing self-repair superhydrophobic coating. The superhydrophobic composite coating with self-repair function is prepared from the following raw materials in parts by weight: 1-20 parts of graphene, 1-20 parts of tetraethyl orthosilicate or tetrabutyl titanate, 1-20 parts of ammonia water, 1-5 parts of low-surface-energy modifier, 60-90 parts of low-surface-energy high-molecular polymer, 2-7 parts of pore forming agent, 5-25 parts of deionized water and 60-100 parts of organic solvent. The pore structure constructed inside the coating can keep a coarse structure for a long time in the friction process. The high-strength graphene can enhance the mechanical strength of the coating, thereby keeping high hydrophobicity and oleophobicity of the coating in the friction process. After the rubbed coating is subjected to simple heating treatment, the low-surface-energy substances stored and grafted in the nano storage tank structures among the multilayer graphene can be activated, and thus, can migrate to the coating surface, thereby implementing the hydrophobic and oleophobic repair of the coating.

Description

technical field [0001] The invention relates to a superhydrophobic coating and a preparation method thereof. Background technique [0002] The phenomenon of superhydrophobicity means that the static contact angle between water droplets and solid surface is greater than 150°, and the rolling angle is less than 10°. Superhydrophobic material is a new type of material with unique properties inspired by the self-cleaning effect of lotus leaves in nature. Since the liquid cannot wet the surface of superhydrophobic materials, it has a very wide application prospect in the fields of anti-corrosion, anti-icing, self-cleaning, frictional drag reduction, photoelectric materials and other fields. [0003] There are two ways to prepare superhydrophobic surfaces, one is to construct rough structures directly on the surface of low surface energy materials, and the other is to roughen the surface of substrate materials with high surface energy such as metals, metal oxides, and inorganic m...

Claims

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Application Information

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IPC IPC(8): C09D127/16C09D181/02C09D127/18C09D183/08C09D181/06C09D7/12
Inventor 汪怀远刘战剑张曦光王池嘉朱艳吉
Owner NORTHEAST GASOLINEEUM UNIV
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