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Superhydrophobic coating and preparation method thereof

A super-hydrophobic coating and ultrasonic dispersion technology, which is applied in the direction of coating, hydrophobic agent addition, inorganic compound addition, etc., can solve the problems of harsh preparation conditions and cumbersome preparation steps of super-hydrophobic materials, and achieve a wide range of applications

Inactive Publication Date: 2016-04-20
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Nowadays, the preparation steps of many superhydrophobic materials are cumbersome or the preparation conditions are very harsh.

Method used

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  • Superhydrophobic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 2 g of natural clinoptilolite and add it to 50 g of ethanol, ultrasonically disperse for 30 min, then add 0.17 g of perfluorodecyltrichlorosilane, and continue ultrasonicating for 10 min to obtain a dispersion. After soaking for 3 minutes, take it out and dry it at 60° C. for 30 minutes, immerse the dried filter paper in the dispersion liquid again, take it out after 3 minutes and dry it again for 30 minutes, and a superhydrophobic coating is formed on the surface of the filter paper. The conditions for the ultrasonic dispersion are that the ultrasonic frequency is 40KHz and the ultrasonic power is 100W. Figure 1 to Figure 2 They are the scanning electron micrograph and the contact angle diagram of the superhydrophobic coating on the surface of the filter paper, respectively. It can be seen from the figure that the hydrophobic coating has a better micro-nano structure and good hydrophobic performance.

Embodiment 2

[0022] Weigh 5g of natural mordenite and add it to 100g of ethanol, ultrasonically disperse for 60min, then add 0.85g of perfluorodecyltrichlorosilane, continue ultrasonicating for 30min to obtain a dispersion, and dip a round filter paper used in the laboratory into the dispersion Take it out after 5 minutes and dry it at 70°C for 30 minutes, immerse the dried filter paper in the dispersion liquid again, take it out after 5 minutes and dry it again for 30 minutes, immerse the dried filter paper in the dispersion liquid again, take it out after 3 minutes and finally After drying for 45min, a superhydrophobic coating is formed on the surface of the filter paper. The conditions for the ultrasonic dispersion are that the ultrasonic frequency is 20KHz, and the ultrasonic power is 60W.

Embodiment 3

[0024] Weigh 3g of natural calcium zeolite and add it to 60g of ethanol, ultrasonically disperse for 45min, then add 0.45g of perfluorodecyltrichlorosilane, continue to ultrasonically for 45min to obtain a dispersion, and dip a conventional circular filter paper in the laboratory into the dispersion After 4 minutes, it was taken out and dried at 65° C. for 45 minutes. The dried filter paper was immersed in the dispersion again, taken out after 4 minutes and dried again for 45 minutes. A superhydrophobic coating was formed on the surface of the filter paper. The conditions for the ultrasonic dispersion are that the ultrasonic frequency is 20KHz, and the ultrasonic power is 60W.

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Abstract

The invention belongs to the field of material surface and inorganic porous material and specifically relates to a superhydrophobic coating and its preparation method. The preparation method comprises the following steps: a, adding 1-5 parts by weight of natural zeolite into 50-100 parts by weight of ethanol, carrying out ultrasonic dispersion for 10-30 min, adding 0.15-0.85 part by weight of perfluorodecyltrichlorosilane, and continuously carrying out ultrasonic dispersion for 10-30 min to obtain a dispersion liquid; b, immersing a base material into the dispersion liquid obtained in the step a for 3-5 min, taking out the base material and drying the base material at 50-70 DEG C for more than 30 min; and c, repeating the step b for two to three times so as to form the superhydrophobic coating on the surface of the base material. Natural zeolite belongs to an inorganic porous material and is easy to form a micro-nano structure in the coating. Meanwhile, there exist many hydroxide radicals on the surface of zeolite, and its surface energy is reduced after condensation between perfluorodecyltrichlorosilane and hydroxide radicals. Thus, the superhydrophobic effect is achieved. The natural zeolite is cheap and easily available. The preparation method is simple and easy for industrialization. The coating of the invention has a self-cleaning ability, is applicable to many base materials and is widely applied.

Description

technical field [0001] The invention belongs to the field of material surfaces and inorganic porous materials, and in particular relates to a superhydrophobic coating and a preparation method thereof. Background technique [0002] A superhydrophobic surface refers to a surface with a static contact angle with water of greater than 150° and a rolling angle of less than 10°. Such surfaces exist widely in nature, such as lotus leaves, butterfly wings, fly compound eyes, water strider legs and so on. On the superhydrophobic surface, the water droplets are spherical, and as the surface is inclined, the water droplets can easily roll and take away the dust on the surface, so the superhydrophobic surface has a self-cleaning function. Because water cannot spread on it, it also has the functions of anti-frost, anti-fog, anti-snow, anti-corrosion, anti-adhesion, etc., so it has a wide application prospect in the fields of architectural coatings, fabric finishing, transportation, powe...

Claims

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Application Information

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IPC IPC(8): D21H17/06D21H17/68D21H17/13D21H21/16C09D1/00C09D7/12
CPCD21H17/74C09D1/00C09D7/63D21H17/06D21H17/13D21H17/68D21H21/16
Inventor 徐祖顺曾维国刘瑞清张力张淑来江存朱琴柯志刚
Owner HUBEI UNIV
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