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Superhydrophobic coating, superhydrophobic coating and preparation method of the superhydrophobic coating

A technology of super-hydrophobic coating and hydrophobic nano-technology, applied in the direction of coating, etc., can solve the problems of insufficient stability of super-hydrophobic surface, unfavorable industrial production, insufficient tolerance, etc., achieve good reusability and service life, and not easy to aging and failure , the effect of simple method

Active Publication Date: 2016-08-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can prepare superhydrophobic surfaces, the process of most methods is relatively complicated, many methods require special equipment, and the energy consumption and cost are relatively high, which is not conducive to industrial production.
In addition, the superhydrophobic surface prepared by the existing method is generally not stable enough, easy to age, easy to fail, and less resistant to harsh working environments (strong acid and alkali, high temperature, ultraviolet rays), etc.

Method used

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  • Superhydrophobic coating, superhydrophobic coating and preparation method of the superhydrophobic coating
  • Superhydrophobic coating, superhydrophobic coating and preparation method of the superhydrophobic coating
  • Superhydrophobic coating, superhydrophobic coating and preparation method of the superhydrophobic coating

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preparation example Construction

[0019] Please refer to figure 1 , the embodiment of the present invention provides a kind of preparation method of superhydrophobic coating, it comprises the following steps:

[0020] Step 1: According to the ratio of parts by volume, take 50-80 parts of hydrophobic nanoparticle dispersion with a mass fraction of 2% to 15%, 20-50 parts of polystyrene nanoparticle dispersion with a mass fraction of 1% to 10%, 0~30 parts of solvents are mixed and ultrasonically dispersed to obtain a mixed solution;

[0021] Step 2: forming the mixed solution on the surface of a substrate and in the microstructure inside the substrate;

[0022] Step 3: Dry the substrate in step 2, then heat up to 160-230°C and bake to melt the polystyrene nanoparticles, take it out and dry it naturally.

[0023] In step (1), the hydrophobic nanoparticle dispersion can be obtained by dispersing the hydrophobic nanoparticles in a solvent, or by suspension polymerization, emulsion polymerization and other polymeri...

Embodiment 1

[0036] Take 60 parts (parts by volume) of polytetrafluoroethylene dispersion with a mass fraction of 6%, 20 parts of polystyrene dispersion with a mass fraction of 2.5%, and 20 parts of water, and then ultrasonically disperse to obtain a mixed solution, wherein, The particle size of the polytetrafluoroethylene is about 220nm, and the particle size of the polystyrene is about 200nm; use a high-density cotton cloth (average pore size less than 200 microns) as the substrate, and immerse it in the mixed solution to deposit 20 minutes; take out the high-density cotton cloth immersed in the mixed solution, put it in a drying oven at 70°C for 30 minutes, and finally raise the temperature to 220°C for 20 minutes, take it out and dry it naturally to obtain a superhydrophobic cotton cloth. After testing, the contact angle of the superhydrophobic cotton cloth to water is greater than 150°. In addition, the contact angle of the super-hydrophobic cotton cloth to oil (n-hexane, n-hexadecane...

Embodiment 2

[0038] This embodiment is basically the same as the above-mentioned embodiment 1, except that a polyester or polypropylene non-woven fabric is used as the base and immersed in the mixed solution, wherein the average pore size of the non-woven fabric is less than 200 microns. Thereby superhydrophobic polyester or polypropylene non-woven fabrics are obtained. After testing, the contact angle of the hydrophobic polyester or polypropylene nonwoven fabric to water is greater than 150°. At the same time, the hydrophobic polyester or polypropylene non-woven fabric has a contact angle of 0° to oil (n-hexane, n-hexadecane, chloroform, gasoline, silicone oil, etc.), so it can also be used for oil-water separation. The hydrophobic polyester or polypropylene non-woven fabric has a separation efficiency of more than 99% for mixtures of oil (n-hexane, n-hexadecane, chloroform, gasoline, silicone oil, etc.) and water.

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Abstract

The invention provides a preparation method of a superhydrophobic coating. The preparation method comprises the steps of 1, mixing 50-80 parts of hydrophobic nanoparticle dispersing liquid with the mass percentage of 2-15%, 20-50 parts of polystyrene nanoparticle dispersing liquid with the mass percentage of 1-10% and 0-30 parts of solvent according to the volume part ratio, and ultrasonically dispersing the mixture to obtain a mixed solution; 2, forming the mixed solution on the surface of a substrate and in a microstructure in the substrate; 3, drying the substrate obtained in the step 2, then, raising the temperature to 160-230 DEG C, baking to melt polystyrene nanoparticles, and taking out for naturally airing. The invention also relates to a superhydrophobic paint and the superhydrophobic coating.

Description

technical field [0001] The invention relates to a superhydrophobic coating, a superhydrophobic coating formed from the superhydrophobic coating and a preparation method of the superhydrophobic coating. Background technique [0002] Wettability is an important property of a solid surface, and is generally characterized by the contact angle between a liquid droplet and a solid surface. When the contact angle between a water droplet and a solid surface is greater than 150° and the rolling angle is less than 10°, the solid surface is called a superhydrophobic surface. There are many superhydrophobic surfaces in nature, such as the leaf surfaces of various plants represented by lotus leaves, the legs of water striders, the feathers of water birds, and the wings of Lepidoptera insects such as butterflies. Superhydrophobic materials have many unique surface properties, such as self-cleaning, anti-corrosion, biocompatibility, superhydrophobicity, etc., so they have broad applicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/18C09D127/16C09D127/12C09D125/06C09D7/12
Inventor 汪家道杜川陈大融
Owner TSINGHUA UNIV
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