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A kind of preparation method of PDMS superhydrophobic composite coating and coating

A technology of super-hydrophobic coating and composite coating, which can be applied to coatings, devices for coating liquids on surfaces, special surfaces, etc. Difficulties and other problems, to achieve good thermal stability and chemical stability, improve hydrophobic properties, the effect of small bond energy between layers

Active Publication Date: 2020-03-31
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, silica is mostly used as raw material for hydrophobic coatings, but the existing hydrophobic coatings have poor stability and uniformity, and it is difficult to form a large-scale film, and the micro-nano structure of the super-hydrophobic surface is not easy to control; at the same time, the existing super-hydrophobic film in The adhesion on the UPVC substrate is poor, which requires special substrate materials or special equipment to achieve, the cost is high, and the process is relatively complicated

Method used

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  • A kind of preparation method of PDMS superhydrophobic composite coating and coating
  • A kind of preparation method of PDMS superhydrophobic composite coating and coating

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Embodiment 1

[0033] A superhydrophobic coating is prepared by the following steps,

[0034] 1. Prepare the solution

[0035] Liquid A: Commercially available diatomite is ground and added to a mixed solvent (tetrahydrofuran: ethanol = 4:1, V / V), fully oscillated and mixed to obtain a uniform dispersion, wherein the mass-volume concentration of diatomite is 200mg / mL;

[0036] Liquid B: Weigh fluorinated graphite powder and disperse it in dichloromethane solvent, shake and mix well to obtain a stable suspension, wherein the mass-volume concentration of fluorinated graphite powder is 50mg / mL;

[0037] Liquid C: Weigh polyamide powder and dissolve it in tetrahydrofuran solution, shake and mix well to obtain a uniform dispersion, wherein the mass-volume concentration of polyamide is 50 mg / mL;

[0038] Liquid D: Disperse polydimethylsiloxane (PDMS) in tetrahydrofuran solvent (1:1, V / V), oscillate and mix well, and disperse for more than 1 day to obtain a uniform dispersion liquid, in which the...

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Abstract

The invention provides a PDMS (polydimethylsiloxane) super-hydrophobic composite coating and a preparation method thereof. The coating is prepared from components as follows: diatomaceous earth, graphite fluoride, polyamide, PDMS and a curing agent in the mass ratio being (16-24):(0.8-1.2):(0.8-1.2):(16-24):(1.5-2.5); an organic solvent is adopted, and the concentration of diatomaceous earth is 90-130 mg / mL. According to the provided coating, the preparation process is simple, no complicated material premodification is required, all that is required for the use of the coating is to mix the components in the ratio and cure the components at 50-70 DEG C, the super-hydrophobic coating can be obtained on a small-area plate material and pipeline with a dipping-pulling method, spraying of a large-area plate material can be realized with a high-pressure spraying method, and the coating is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a PDMS superhydrophobic composite coating and a preparation method of the coating. Background technique [0002] At present, silica is mostly used as raw material for hydrophobic coatings, but the existing hydrophobic coatings have poor stability and uniformity, and it is difficult to form a large-scale film, and the micro-nano structure of the super-hydrophobic surface is not easy to control; at the same time, the existing super-hydrophobic film in The adhesion on the UPVC substrate is poor, which requires special substrate materials or special equipment to achieve, the cost is high, and the process is relatively complicated. Contents of the invention [0003] In view of this, the present invention aims to propose a preparation method of PDMS superhydrophobic composite coating and coating, to overcome the deficiencies in the prior art, improve stability, good uniformity, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D7/61C09D7/65C08J7/04B05D7/02B05D5/00C08L27/06
CPCB05D5/00B05D7/02C08J7/0427C08J2327/06C08J2477/00C08J2483/04C09D7/65C09D183/04C08L77/00C08K3/36C08K3/16
Inventor 宦双燕周文静郑小芳王娅娅郭昊威南彬
Owner HUNAN UNIV
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