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 mat

Method used

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  • Superhydrophobic coating and preparation method thereof
  • Superhydrophobic coating and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0019] Example 1

[0020] Weigh 2g of natural clinoptilolite and add it to 50g of ethanol, disperse by ultrasonic for 30min, then add 0.17g of perfluorodecyltrichlorosilane, and continue to sonicate for 10min to obtain a dispersion, and place a conventional circular filter paper in the laboratory in the dispersion After being immersed for 3 minutes, it was taken out and dried at 60° C. for 30 minutes. The dried filter paper was again immersed in the dispersion liquid. After 3 minutes, it was taken out and dried again for 30 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 40KHz and the ultrasonic power is 100W. Figure 1 to Figure 2 These are respectively the scanning electron microscope image and the contact angle image of the superhydrophobic coating on the surface of the filter paper. It can be seen from the figures that the hydrophobic coating has a better micro...

Example Embodiment

[0021] Example 2

[0022] Weigh 5g natural mordenite into 100g ethanol, disperse ultrasonically for 60min, add 0.85g perfluorodecyltrichlorosilane, and continue to sonicate for 30min to obtain the dispersion, and immerse the laboratory with conventional round filter paper in 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 again, take it out after 5 minutes and dry it again for 30 minutes, immerse the dried filter paper in the dispersion again, take it out after 3 minutes, and finally After drying for 45 minutes, a super-hydrophobic 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.

Example Embodiment

[0023] Example 3

[0024] Weigh 3g of natural calcium zeolite into 60g ethanol, disperse ultrasonically for 45min, add 0.45g perfluorodecyltrichlorosilane, and continue to sonicate for 45min to obtain a dispersion, and immerse the laboratory with conventional round filter paper in the dispersion After 4 minutes, the filter paper was taken out and dried at 65° C. for 45 minutes. The dried filter paper was immersed in the dispersion again. After 4 minutes, it was taken out 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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