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Preparation method of a large-area superhydrophobic coating with adjustable liquid adhesion

A technology of super-hydrophobic coating and adhesion, which is applied in coatings, epoxy resin coatings, etc., and can solve the problems of high cost, cumbersome process, and inapplicability of large-area super-hydrophobic coatings with adjustable liquid adhesion. , to achieve the effect of low cost and simple process

Active Publication Date: 2022-02-18
成都泰格尔航天航空科技股份有限公司
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems that the existing preparation methods are cumbersome and costly, and the existing laboratory methods are not suitable for preparing large-area super-hydrophobic coatings with adjustable liquid adhesion, and provide a Preparation method of large-area superhydrophobic coating with adjustable liquid adhesion

Method used

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  • Preparation method of a large-area superhydrophobic coating with adjustable liquid adhesion
  • Preparation method of a large-area superhydrophobic coating with adjustable liquid adhesion
  • Preparation method of a large-area superhydrophobic coating with adjustable liquid adhesion

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specific Embodiment approach 1

[0031] Specific embodiment one: a kind of preparation method of the large-area superhydrophobic coating that can control the liquid adhesion of this embodiment is carried out according to the following steps:

[0032] 1. Dissolve 10g of polytetrafluoroethylene particles in 40mL of acetone, and magnetically stir for 20 minutes until the mixture is uniform to obtain a polytetrafluoroethylene solution;

[0033] 2. Dissolve 4g of epoxy resin in 8mL of acetone and stir until the epoxy resin is completely dissolved to obtain an epoxy resin solution;

[0034] 3. Mix the polytetrafluoroethylene solution and the epoxy resin solution to obtain a PTFE / epoxy resin mixture, and then add 1H, 1H, 2H, 2H-perfluorodecyltrimethoxy to the PTFE / epoxy resin mixture dropwise base silane, then added triethylenetetramine, first magnetically stirred for 20min, then ultrasonically treated for 20min, and then magnetically stirred for 20min to obtain a superhydrophobic coating solution; in the PTFE / epoxy...

specific Embodiment approach 2

[0036] Embodiment 2: This embodiment differs from Embodiment 1 in that the spraying pressure in step 4 is 0.25 bar. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0037] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the spraying pressure in step 4 is 0.5 bar. Other steps and parameters are the same as those in the first embodiment.

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Abstract

A method for preparing a large-area superhydrophobic coating with adjustable liquid adhesion. The invention belongs to the field of superhydrophobic coating and its preparation. The purpose of the present invention is to solve the technical problems of cumbersome process and high cost in the existing preparation method, and that the existing laboratory method is not suitable for preparing a large-area super-hydrophobic coating with adjustable liquid adhesion. The method of the present invention: first dissolve polytetrafluoroethylene particles in acetone, then dissolve epoxy resin in acetone, mix to obtain PTFE / epoxy resin mixed liquid, then drop fluorosilane and amine curing agent to obtain super Hydrophobic coating solution, and finally spray the superhydrophobic coating solution onto the surface of the substrate and cure to obtain a superhydrophobic coating. The invention controls the micro-nano structure of the prepared superhydrophobic surface by controlling the spraying pressure in the spraying process, so as to realize the controllable adhesion of water droplets, and is suitable for anti-icing, self-cleaning, droplet transfer / collection equipment and water drop pattern design and other fields.

Description

technical field [0001] The invention belongs to the field of superhydrophobic coating and its preparation, and in particular relates to a method for preparing a large-area superhydrophobic coating capable of regulating liquid adhesion. Background technique [0002] Superhydrophobic surfaces are generally considered to be surfaces with a water contact angle greater than 150° and a rolling angle less than 10°, which can be prepared by designing surface roughness and low surface energy materials. The lotus leaf surface, water striders, gecko feet and many other natural organisms have attracted the attention of many researchers. Based on the superhydrophobic principle, self-cleaning surfaces, oil-water separation, anti-icing and other fields have been gradually applied. Taking lotus leaves and rose petals as examples, the water contact angle on the surface of lotus leaves is large and the rolling angle is small, making it difficult for water droplets to stay on the surface of l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/18C09D163/00C09D7/63
CPCC09D127/18C09D7/63
Inventor 矫维成李君
Owner 成都泰格尔航天航空科技股份有限公司
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