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Super-hydrophobic composite coating and preparation method thereof

A composite coating, super-hydrophobic technology, applied in coatings, epoxy coatings, devices for coating liquids on the surface, etc., can solve the problems of long cycle, difficult to expand application, complex operation, etc. Wide application range and good wear resistance

Active Publication Date: 2020-06-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is not difficult to see that the preparation of most superhydrophobic surfaces currently requires the use of specific equipment and the cycle is long and the operation is complicated, making it difficult to further expand the application

Method used

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  • Super-hydrophobic composite coating and preparation method thereof
  • Super-hydrophobic composite coating and preparation method thereof
  • Super-hydrophobic composite coating and preparation method thereof

Examples

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preparation example Construction

[0031] A preparation method of super-hydrophobic composite coating includes the following steps:

[0032] Step (1), at room temperature, ultrasonically disperse a certain amount of epoxy resin and its curing agent in an organic solvent to form a uniform solution, and then spray it on the surface of the substrate and dry for a period of time;

[0033] Step (2), at room temperature, ultrasonically disperse a certain amount of epoxy resin and its curing agent in an organic solvent to form a uniform solution, and then add a certain amount of inorganic nano fillers to it and magnetically stir for a certain period of time to make it uniformly dispersed. Then spray it on the surface of the substrate prepared in step (1);

[0034] Step (3), at room temperature, ultrasonically disperse a certain amount of polydimethylsiloxane (PDMS) and its curing agent in an organic solvent to form a uniform solution, and then spray it on the substrate prepared in step (2) The surface is dried for a period ...

Embodiment 1

[0039] Step (1): At room temperature, 0.07g of epoxy resin E51 and 0.0175g of curing agent methyltetrahydrophthalic anhydride were ultrasonically dispersed in 0.5g of ethyl acetate to form a uniform solution, and then sprayed on a 25mm×80mm aluminum alloy sheet And dry treatment at 130℃ for 2.5h;

[0040] Step (2): At room temperature, 0.06g of epoxy resin E51 and 0.015g of curing agent methyltetrahydrophthalic anhydride were ultrasonically dispersed in 1g of ethyl acetate to form a uniform solution, and then 0.18g of ZnO was added to it and stirred 2h to make it evenly dispersed, and then spray it on the surface of the aluminum alloy sheet prepared in step (1);

[0041] Step (3): At room temperature, 0.01g PDMS Sylgard-184A and 0.001g curing agent Sylgard-184B were ultrasonically dispersed in 1g n-hexane to form a uniform solution, and then sprayed on the aluminum prepared in step (2) The surface of the alloy sheet is dried at 140°C for 2 hours, and the super-hydrophobic coating ...

Embodiment 2

[0044] Step (1): At room temperature, 0.05g epoxy resin E51 and its curing agent methyltetrahydrophthalic anhydride 0.0125g are ultrasonically dispersed in 0.3g ethyl acetate to form a uniform solution, and then sprayed on 45×45mm leather and combined Dry treatment at 150℃ for 1.5h;

[0045] Step (2): At room temperature, 0.08g of epoxy resin E51 and 0.02g of curing agent methyltetrahydrophthalic anhydride were ultrasonically dispersed in 1.2g of ethyl acetate to form a uniform solution, and then 0.2g of TiO was added to it 2 And stir for 2 hours, and then spray it on the leather surface prepared in step (1);

[0046] Step (3): At room temperature, 0.015g PDMS Sylgard-184A and its 0.0015g curing agent Sylgard-184B are ultrasonically dispersed in 0.8g n-hexane to form a uniform solution, and then sprayed on the prepared in step (2) The surface of the leather is dried at 130°C for 5 hours, and the super-hydrophobic coating can be obtained after fully curing.

[0047] figure 2 TiO use...

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Abstract

The invention provides a super-hydrophobic composite coating and a preparation method thereof. The preparation method comprises the following steps: step 1, ultrasonically dispersing epoxy resin and acuring agent of the epoxy resin in an organic solvent so as to form a uniform epoxy resin solution, spraying the epoxy resin solution onto the substrate surface, and carrying out drying; step 2, ultrasonically dispersing the epoxy resin and the curing agent of the epoxy resin in the organic solvent so as to form the uniform epoxy resin solution, adding an inorganic nanofiller into the epoxy resinsolution, carrying out uniform stirring and dispersing so as to obtain a mixed solution, and then spraying the mixed solution onto the substrate surface obtained in step 1; and step 3, ultrasonicallydispersing polydimethylsiloxane and a curing agent of polydimethylsiloxane in an organic solvent so as to form a uniform polydimethylsiloxane solution, spraying the polydimethylsiloxane solution ontothe substrate surface obtained in step 2, carrying out drying, and acquiring the super-hydrophobic composite coating after complete curing. The preparation method has the beneficial effects that no special equipment is needed; and not only is the operation simple and the application range wide, but also the super-hydrophobic performance of the coating can be greatly improved.

Description

Technical field [0001] The invention belongs to the field of coatings, and relates to a super-hydrophobic composite coating and a preparation method thereof. Background technique [0002] With the development of surface engineering, super-hydrophobic coating has received widespread attention. It is a material surface with special functional properties with a water contact angle of >150°C and a rolling angle of <10°C. In recent years, superhydrophobic coatings have important application prospects in self-cleaning, anti-icing, anti-corrosion, oil-water separation, anti-bacterial adhesion and other fields (Li XM, Reinhoudt D, Crego-Calama M. Chemical Society Reviews, 2007 ,36(8):1350-1368.). At present, two conditions must be met to construct a superhydrophobic coating: one is that the surface of the material has low surface energy substances, and the other is that the surface has a rough structure. For example, Liu et al. used an etching process combined with high-temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/24B05D7/14B05D7/12D06N3/12D06N3/00C09D163/00C09D7/61C09D183/04
CPCB05D5/00B05D7/24B05D7/14B05D7/12B05D7/584B05D7/582D06N3/12D06N3/128D06N3/0063C09D163/00C09D7/61C09D183/04B05D2451/00B05D2504/00B05D2518/12B05D2202/00B05D2203/24B05D2203/35B05D2601/20B05D2601/24D06N2209/142D06N2209/146D06N2209/1685C08K2201/011C08K2003/2241C08K2003/2244C08K2003/2296C08K2003/2227B05D2401/10B05D2420/01B05D2420/02B05D2420/03C08K3/22
Inventor 鲍艳郑茜高璐强拓李雯静魏德飞
Owner SHAANXI UNIV OF SCI & TECH
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