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Super-hydrophobic coating, super-hydrophobic coating layer, and preparation method thereof

A technology of super-hydrophobic coatings and super-hydrophobic coatings, applied in pigmented coatings, coatings, separation methods, etc., can solve problems such as poor stability, high cost, and low separation efficiency, and achieve low cost, good friction resistance, The effect of simple preparation method

Inactive Publication Date: 2017-02-01
TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods generally have disadvantages such as high cost, poor stability, and low separation efficiency.

Method used

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  • Super-hydrophobic coating, super-hydrophobic coating layer, and preparation method thereof
  • Super-hydrophobic coating, super-hydrophobic coating layer, and preparation method thereof
  • Super-hydrophobic coating, super-hydrophobic coating layer, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A super-hydrophobic paint, the weight percentage content of each component is: 1% hydrophobic nano silicon dioxide particles, 1% methyl silicone resin, 98% xylene solution.

[0047] The method for preparing the above-mentioned super-hydrophobic coating: according to the mass fraction of the final solution, 1% of hydrophobic nano-silica particles and 1% of methyl silicone resin are dissolved in xylene solution for ultrasonic dispersion, and the mixture can be obtained after mixing evenly. Superhydrophobic coatings.

[0048] Such as figure 1 Shown, a kind of superhydrophobic coating, described superhydrophobic coating is a micro-nano composite rough structure, and this coating comprises hydrophobic nanoparticle layer 2, hydrophobic resin layer 1 and base material layer 3; Described hydrophobic nanoparticle layer 2. The hydrophobic resin layer 1 and the base material layer 3 are laminated, and the hydrophobic resin layer 1 wraps part of the hydrophobic nanoparticles in th...

Embodiment 2

[0059] This example is basically the same as that of Example 1, except that the polyurethane sponge is immersed in the preparation solution to obtain a superhydrophobic sponge. After testing, the contact angle of the superhydrophobic sponge is 159°. At the same time, the superhydrophobic sponge has a contact angle of 0° to oil (n-hexane, carbon tetrachloride, chloroform, gasoline, silicone oil, etc.), so it can also be used for oil-water separation. The superhydrophobic sponge has a separation efficiency of more than 99% for the mixture of oil (n-hexane, carbon tetrachloride, chloroform, gasoline, silicone oil, etc.) and water, and the superhydrophobic sponge can be squeezed to recover the oil, and it can be reused 10 times , the separation efficiency is still above 98%.

Embodiment 3

[0061] This embodiment is basically the same as the above-mentioned embodiment 1, except that the qualitative filter paper is used as the base material and immersed in the preparation solution to obtain the super-hydrophobic filter paper. After testing, the contact angle of the superhydrophobic filter paper to water is 156°; meanwhile, the contact angle of the superhydrophobic filter paper to oil (n-hexane, carbon tetrachloride, chloroform, gasoline, silicone oil, etc.) is 0°, so it is also Can be used for oil-water separation. The superhydrophobic filter paper has a separation efficiency of more than 99% for the mixture of oil (n-hexane, carbon tetrachloride, chloroform, gasoline, silicone oil, etc.) and water.

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Abstract

The invention provides a preparation method of a super-hydrophobic coating layer. The preparation method includes the steps of: 1) according to mass percentage of a final solution, dissolving 0.5-10% of hydrophobic nano particles and 1-15% of hydrophobic resin in a solvent, performing ultrasonic dispersion for 15-60 min to obtain a mixed solution; 2) forming the mixed solution on the surface of a substrate material and in internal microstructures of the substrate material; 3) naturally air-drying the substrate material to form the super-hydrophobic coating layer. According to the method, the preparation process of the coating layer is free of assistance of external equipment, such as heating and the like, so that the method is simple and low-cost. The method can achieve preparation of the super-hydrophobic coating layer on various fiber surfaces and porous material surfaces, has excellent universality and is easy to achieve in industrial large-area preparation.

Description

technical field [0001] The invention belongs to the field of hydrophobic materials, and in particular relates to a superhydrophobic coating, a superhydrophobic coating and a preparation method thereof. Background technique [0002] The wettability of solid surfaces is inextricably linked to the life activities of animals and plants in nature, and even more closely related to human society. Researchers usually use the static contact angle between solid surface and water to explain the difference in wettability. Generally speaking, 90° is used as the limit. The contact angle of hydrophilic surface is generally less than 90°, and the contact angle of hydrophobic surface is generally greater than 90°. Among them, the superhydrophobic surface refers to the surface with a contact angle with water greater than 150° and a rolling angle less than 10°. This functional surface has attracted worldwide attention due to its excellent properties such as self-cleaning, anti-adhesion, anti-f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/12C08J9/40C08J9/42C08J7/00C08J7/04D21H27/08D21H19/64D21H19/62C08L75/04
CPCC08J7/00C08J9/40C08J9/42C08J2375/04C08J2483/04C08K3/36C08K9/00C08K2201/011C09D183/04C08J7/0427D21H19/62D21H19/64D21H27/08
Inventor 汪家道李杨杜川
Owner TIANJIN RES INST FOR ADVANCED EQUIP TSINGHUA UNIV
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