Flexible conductive super-hydrophobic coating and preparation method thereof

A super-hydrophobic coating, flexible conductive technology, applied in conductive coatings, coatings, conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of intolerant stretching and bending of conductive coatings, and easy damage to conductivity , No problems such as hydrophobicity, to achieve the effect of excellent hydrophobicity and electrical conductivity, excellent stretchability, and excellent electrical conductivity

Active Publication Date: 2018-04-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the shortcomings of current superhydrophobic coatings such as poor flexibility, resistance to stretching and bending, and the shortcomings of conductive coatings that do not have hydrophobicity and are easily damaged under external force, and provides a flexible conductive superhydrophobic coating with simple operation. The preparation method of the coating, the obtained coating has the advantages of excellent hydrophobicity, conductivity and acid and alkali resistance stability, and the coating can also maintain hydrophobicity and conductivity in the stretched state

Method used

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  • Flexible conductive super-hydrophobic coating and preparation method thereof
  • Flexible conductive super-hydrophobic coating and preparation method thereof
  • Flexible conductive super-hydrophobic coating and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] 2g of silver particles with a size of 100‐200nm were dispersed in 100g of ethanol solution of 1wt% cetyl mercaptan, ultrasonically dispersed for 15min and stirred at room temperature for 8h, then centrifuged at 8000rpm for 20min, and the product was used After washing with ethanol, vacuum-dry at 40°C for 8 hours to obtain hydrophobic silver particles. Add 0.35 g of hydrogenated styrene-butadiene-styrene block copolymer to 17.5 g of toluene, stir at 40°C for 5 h, then add 1.05 g of hydrophobic silver particles, and ultrasonically disperse for 1 h to obtain a mixed dispersion. Secondly, pre-stretch the natural rubber base to 3 times the original length with an external force, and use a spray gun (working pressure is 0.6MPa, the distance between the spray gun and the rubber base is 15cm, the moving speed is 1cm / s, and the spray gun reciprocates and sprays for 2 cycles) to spray the mixed dispersion Spray on rubber substrates. Finally, the coating was dried at 30°C for 15 ...

Embodiment 2

[0034] 3g of silver particles with a size of 250-300nm were dispersed in 100g of ethanol solution of 0.5wt% tetramercaptan, ultrasonically dispersed for 5min and stirred at room temperature for 3h, then centrifuged at 6000rpm for 30min, and the product After washing with ethanol, vacuum-dry at 30°C for 12 hours to obtain hydrophobic silver particles. Add 0.4g of styrene-isoprene-styrene block copolymer to 16g of xylene, stir at 30°C for 12h, then add 1.2g of hydrophobic silver particles, and ultrasonically disperse for 1h to obtain a mixed dispersion. Secondly, pre-stretch the natural rubber base to 2.5 times the original length with an external force, and use a spray gun (working pressure is 0.7MPa, the spray gun is 20cm away from the rubber base, the moving speed is 2cm / s, and the spray gun reciprocates and sprays for 2 cycles) to mix the dispersion Spray on rubber substrates. Finally, the coating was dried at 30°C for 30 min to fully volatilize the solvent, and then the ex...

Embodiment 3

[0039] Disperse 2g of silver particles with a size of 200-300nm in 100g of ethanol solution of dodecanethiol and cetyl mercaptan (the mass ratio of dodecanethiol and cetyl mercaptan is 1) with a mass concentration of 100g, ultrasonically disperse for 20min and Continue to stir at room temperature for 10 h, then centrifuge at 8000 rpm for 15 min, wash the product with ethanol and then vacuum dry at 40° C. for 8 h to obtain hydrophobic silver particles. Add 0.3 g of hydrogenated styrene-isoprene-styrene block copolymer to 15 g of toluene, stir at 50 °C for 5 h, then add 1.2 g of hydrophobic silver particles, and ultrasonically disperse for 2 h to obtain a mixed dispersion. Secondly, use external force to pre-stretch the silicone rubber base to 3 times the original length, use a spray gun (working pressure is 0.5MPa, the distance between the spray gun and the rubber base is 15cm, the moving speed is 1.5cm / s, and the spray gun reciprocates and sprays for 1 cycle) to mix and dispers...

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Abstract

The invention discloses a flexible conductive super-hydrophobic coating and a preparation method thereof. The preparation method comprises the following steps: performing hydrophobic modification on silver particles by adopting alkyl sulfhydryl; uniformly mixing a thermoplastic elastomer and the hydrophobic silver particles in an organic solvent, and spraying the mixture onto a rubber substrate pre-stretched to a certain ratio by external force; and finally, removing the external force to relax the rubber substrate after the coating is dried, endowing the coating surface with obvious roughness, and forming a conductive path, thereby obtaining the flexible conductive super-hydrophobic coating based on the rubber substrate. The coating prepared in the invention has a water contact angle of 152-162 degrees at a room temperature and the resistance of 101-103Ohm, has excellent conductivity, acid-alkali resistant stability and tensibility, can maintain the hydrophobic property and conductivity in a tensile state and has wide application prospects.

Description

technical field [0001] The invention relates to the field of a super-hydrophobic coating, in particular to a flexible conductive super-hydrophobic coating and a preparation method thereof. Background technique [0002] Inspired by the "lotus leaf effect" in nature, it has been found that there exists a superhydrophobic surface with a static water droplet contact angle greater than 150° and a roll angle less than 10°. Due to this unique wettability, superhydrophobic surfaces have important application value in the fields of self-cleaning, anti-icing, anti-pollution, flame retardancy, oil-water separation, etc., which has attracted extensive attention of researchers. The superhydrophobic coatings prepared by traditional methods have the disadvantages of cumbersome preparation process, harsh reaction conditions, poor chemical stability and mechanical durability. In order to solve the above problems, researchers at home and abroad have conducted a series of exploratory studies....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D153/02C09D5/24C08L9/02C08L83/04C08L7/00C08J7/044
CPCC09D153/02C09D153/025C09D5/24C08J2309/02C08J2307/00C08J2383/04C08J2453/02C08K2003/0806C08J7/0427C08J7/044H01B1/22C08L9/06C08L15/00C09D5/00C09D7/68C08K2201/011C09D7/61C09D7/62B05B3/001C09D107/00C09D115/005
Inventor 李红强苏晓竞曾幸荣赖学军陈中华
Owner SOUTH CHINA UNIV OF TECH
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