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Transparent super-hydrophobic nano-coating and spraying and preparation method thereof

A nano-coating, super-hydrophobic technology, applied in coatings, devices for coating liquids on surfaces, pre-treatment of surfaces, etc. Effect

Active Publication Date: 2014-12-24
CUBESPACE FURNITURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Contact angle and rolling angle are important for the evaluation of self-cleaning ability, but in some cases, it is not mentioned in the report
For the use of polydimethylsiloxane and silica nanoparticles as raw materials, the method of spraying to prepare a highly transparent superhydrophobic coating on the glass surface has not been reported.

Method used

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  • Transparent super-hydrophobic nano-coating and spraying and preparation method thereof
  • Transparent super-hydrophobic nano-coating and spraying and preparation method thereof
  • Transparent super-hydrophobic nano-coating and spraying and preparation method thereof

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Effect test

preparation example Construction

[0023] A preparation and spraying method of a transparent superhydrophobic nano-coating, the steps are:

[0024] (1) Preparation of spray suspension: ultrasonically disperse hydrophobized fumed silica nanoparticles with a diameter of 15-40 nm in acetone solvent at a concentration of 5-20 mg / mL, and sonicate for 10-40 min. Subsequently, the silicone rubber prepolymer is also ultrasonically dissolved in acetone, the concentration is 2-10 mg / mL, and the ultrasonic time is 10-40 min. The equal volumes of the two solutions are fully mixed, and then ultrasonicated for 5-15 minutes to obtain an organic-inorganic hybrid emulsion. After that, add deionized water, the ratio of the added amount to the volume of the emulsion is 1:1-1:9, and then ultrasonically disperse for 10-30 minutes to obtain a spray suspension. The silicone rubber prepolymer is polydimethylsiloxane Alkanes and their derivatives, when preparing polydimethylsiloxane acetone solution, it is necessary to add a curing ag...

Embodiment 1

[0028] Hydrophobized fumed silica nanoparticles were ultrasonically dispersed in acetone solvent at a concentration of 5 mg / mL, and ultrasonicated for 10 min. Subsequently, polydimethylsiloxane (Sylgard184) was also dissolved in acetone at a concentration of 3 mg / mL, and a curing agent (Dow Corning, USA) was added at the same time in a weight ratio of 1 to polydimethylsiloxane :10, ultrasonic treatment for 10min on a power 150w ultrasonic dispersing device. The equal volumes of the two solutions were fully mixed, and then ultrasonicated for 5 minutes to obtain an organic-inorganic hybrid emulsion. After that, add deionized water, the ratio of the added amount to the volume of the emulsion is 1:9, and then ultrasonically disperse for 10 minutes to obtain a spray suspension.

[0029] Wipe the square glass with a side length of 50 cm with a cotton cloth. Ultrasonic the spray solution for 5 minutes before spraying, so that the silica nanoparticles and polydimethylsiloxane are unif...

Embodiment 2

[0032] Hydrophilic fumed silica nanoparticles were ultrasonically dispersed in acetone solvent at a concentration of 15 mg / mL, and ultrasonicated for 15 min. Subsequently, polydimethylsiloxane (Sylgard184) was ultrasonically dissolved in acetone at a concentration of 10 mg / mL, and a curing agent (Dow Corning, USA) was added at the same time, and the weight ratio of the added amount to polydimethylsiloxane was 1:10, ultrasonic time 20min. The equal volumes of the two solutions were fully mixed, and then ultrasonicated for 10 minutes to obtain an organic-inorganic hybrid emulsion. After that, add deionized water, the ratio of the added amount to the volume of the emulsion is 1:5, and then ultrasonically disperse for 15 minutes to obtain a spray suspension.

[0033] Clean the slide glass ultrasonically in ethanol for 5 minutes, take it out and dry it, blow it dry or dry it in the air for use. Ultrasonic the spray solution for 5 minutes before spraying, so that the silica nanopa...

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Abstract

The invention relates to a transparent super-hydrophobic nano-coating and a spraying and preparation method thereof. In the method, firstly, acetone is taken as solvent to respectively prepare a hydrophilic or hydrophobic gas phase silicon dioxide nano-particle solution with the concentration of 5 to 20 mg / mL, and a silicone rubber prepolymer solution with the concentration of 2 to 10 mg / mL; after ultrasonic dispersion, the two solutions are intensively mixed in an isopyknic manner, then ultrasonic dispersion is performed to obtain an organic and inorganic hybridization emulsion; afterwards, deionized water is added, and the volume ratio of the added deionized water to the emulsion is 1:(1-9), and then ultrasonic dispersion is performed again to obtain spraying suspending liquid; a spray rod or a spray pen is adopted for spraying according to the size of a spraying area; the spraying pressure is 10-80 psi; a transparent super-hydrophobic surface can be obtained after criss-cross spraying and curing. The invention has the advantages that the preparation technology of the coating is simple, the spraying method is simple and convenient, no damage is caused to a base material, the transparency is high, the water pressure resistance, the impact resistance, the chemical stability and the environment durability are relatively good, and the method is suitable for mass production.

Description

technical field [0001] The invention relates to a treatment method of a transparent super-hydrophobic nano-coating. Background technique [0002] Since the 1990s, the superhydrophobicity of solid surfaces (the contact angle with water droplets is greater than 150°, and the rolling angle is less than 10°) has been one of the frontiers and hotspots of international research. two important factors. [0003] Inspired by natural phenomena and production and life, researchers have invented many superhydrophobic surface preparation technologies, including template method, etching method, sol-gel method, surface self-assembly method, chemical deposition method, phase separation method, Electrospinning, anodizing, etc. The raw materials and substrates used are also varied. With the development and wide application of nanoparticles, breakthroughs have been made in the preparation of superhydrophobic surfaces. Since transparent superhydrophobic surfaces have higher requirements on ...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D7/12B05D1/12B05D3/02B05D3/04
Inventor 张友法邵咪余新泉陈锋
Owner CUBESPACE FURNITURE
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