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Preparation method for antistatic super hydrophobic composite coating

A composite coating and super-hydrophobic technology, applied in the field of nanomaterials, can solve the problems of multi-toxic reaction steps, long reaction time, and many steps, and achieve the effect of simple operation, simple raw materials, and mild conditions

Active Publication Date: 2010-08-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has more steps, longer reaction time, and chemical vapor deposition needs to be carried out at high temperature
Literature [Vasiliosgeorgakilas, Athanasios B.Bourlinos, Radek Zboril, and Christos Trapalis, Chem.Mater., 2008, 20 (9), 2884-2886, Synthesis, Characterization and Aspects of SuperhydrophobicFunctionalized Carbon Nanotubes] prepared superhydrophobic carbon nanotubes Coating, however, the carbon nanotubes in this method need to be chemically grafted and modified, the reaction steps are more and the toxic N, N-dimethylformamide is used as a solvent in the reaction process
Therefore, the above methods have their own shortcomings
At the same time, antistatic properties are of great significance for the practical application of superhydrophobic materials. However, general antistatic agents are ionic compounds that are easy to absorb water, so it is unfavorable for the surface of materials to maintain superhydrophobicity.

Method used

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  • Preparation method for antistatic super hydrophobic composite coating
  • Preparation method for antistatic super hydrophobic composite coating
  • Preparation method for antistatic super hydrophobic composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dissolve 0.6 g of styrene-maleic anhydride alternating copolymer in 30 ml of ethanol, add 1 g of carbon nanotubes, stir and mix for 15 minutes and ultrasonic for 5 minutes, mix 1.3 g of aminopropyltriethoxysilane with 0.7 g Add ethyl orthosilicate to the system, add 2.6 grams of ammonia water, stir evenly, and react for 0.5 hours; Spray it on a glass substrate, and after aging for 12 hours, heat it to 180° C. for 1 hour to obtain the final product. The glass is first soaked in a mixed solution of hydrogen peroxide and concentrated sulfuric acid with a weight ratio of 1:1 for 0.5 hours, then washed with deionized water and dried in the air. figure 1 is a scanning electron micrograph of the composite coating surface. figure 2 is a scanning electron micrograph of the composite coating section. image 3 It is the static contact angle optical photo of this composite coating, and its static contact angle is 162 ± 3 degrees. Figure 4 It is the rolling angle optical pictur...

Embodiment 2

[0024] Dissolve 0.2 g of styrene-maleic anhydride alternating copolymer in 50 ml of ethanol, add 1.0 g of carbon nanotubes, stir mechanically for 20 minutes and sonicate for 10 minutes, mix 1.0 g of aminopropyltriethoxysilane with 0.5 g Add ethyl orthosilicate to the system, add 26 grams of ammonia water, stir evenly, react for 1 hour, then add 4.0 grams of ethyl orthosilicate and 0.4 grams of heptadecafluorodecyltrimethoxysilane and mix evenly, spray the solution on After aging for 24 hours on the glass substrate, heat treatment at 150°C for 3 hours to obtain the final product. The static contact angle with water is above 160°, the rolling angle is less than 2°, and the surface resistivity is 1.3×10 6 Ω. The glass is first soaked in a mixed solution of hydrogen peroxide and concentrated sulfuric acid with a weight ratio of 1:1 for 2 hours, then washed with deionized water and dried in the air.

Embodiment 3

[0026] Dissolve 1 gram of styrene-maleic anhydride alternating copolymer in a mixed solvent of 20 milliliters of ethanol and 1 milliliter of water, add 1 gram of carbon nanotubes, sonicate for 10 minutes and mechanically stir for 30 minutes, add 2 grams of methyl trimethyl Ethoxysilane, stirred for 48 hours. In addition, 2 grams of ethyl tetrasilicate and 0.5 grams of heptadecafluorodecyltrimethoxysilane were added to the above system to obtain a uniform dispersion; the solution was sprayed on the ceramic substrate, and after aging for 12 hours, heated Heat treatment at 200° C. for 30 minutes to obtain the final product. The static contact angle with water is above 150°, the rolling angle is less than 2°, and the surface resistivity is 4.5×10 6 Ω. The ceramic substrate is soaked in a mixed solution of hydrogen peroxide and concentrated sulfuric acid with a weight ratio of 1:1 for 1 hour, then cleaned with deionized water and dried in air.

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Abstract

The invention discloses a preparation method for antistatic super hydrophobic composite coating, comprising the following steps: dissolving 0.2-2 parts of styrene-maleic anhydride alternate copolymer by weight into 20-1000 parts of solvent by weight, adding 1 part of carbon nanotube by weight and then evenly mixing, adding 0-26 parts of ammonia water and 0.2-2 parts of silicate ester or titanate compound by weight, stirring and mixing to enable silicate ester or titanate compound to perform hydrolysis reaction, adding 0.1-2 parts of silicate ester or titanate compound and 0.02-0.5 part of fluorine containing silane coupling agent by weight, evenly mixing and spraying on base materials, carrying out aging and thermal treatment to obtain stable antistatic super hydrophobic composite coating. The invention has simple operation and mild condition, the carbon nanotube can be directly used without the need of any chemical modification, the obtained composite coating has good hydrophobicity,the static contact angle and rolling angle between the composite coating and water are respectively larger than 150 degrees and less than 3 degrees, and the surface resistivity is 106-1011 omega, thus meeting the requirement of antistatic transparent coating and having wide application prospect.

Description

technical field [0001] The invention relates to a preparation method of an antistatic superhydrophobic composite coating, which belongs to the technical field of nanomaterials. Background technique [0002] Superhydrophobic surfaces with "lotus leaf" effect (static contact angle with water greater than 150 degrees, rolling angle less than 5 degrees) have received extensive attention in scientific research and practical applications. with broadly application foreground. In recent years, there have been many methods for preparing superhydrophobic surfaces, for example: literature [Kang-Shyang Liao, Albert Wan, et al., Superhydrophobic Surfaces Formed Using Layer-by-Layer Self-Assembly with Aminated Multiwall Carbon Nanotubes, Langmuir, 2008, 24 (8), 4245-4253] The method of chemical modification is the amination of carbon nanotubes, and then the hydrophobic groups are inserted into the amino groups by layer-by-layer assembly to obtain superhydrophobic coatings. However, this ...

Claims

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Application Information

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IPC IPC(8): C09D135/06C09D7/12C09D5/24C03C17/00C04B41/81D06M13/513D06M11/74D06M11/79D06M15/263C08J7/04D06M101/06D06M101/32
Inventor 彭懋周治齐迹廖张洁郭宏磊朱钟鸣
Owner ZHEJIANG UNIV
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