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| Preparation of Superhydrophobic PMHS–SiO2 Coatings by Sol–Gel Method |
| HU Xiaojuan, LIU Lan, LUO Yuanfang, JIA Demin, CHENG Liang, HU Shengzhe |
| College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640 |
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Cite this article:
HU Xiaojuan LIU Lan LUO Yuanfang JIA Demin CHENG Liang HU Shengzhe. Preparation of Superhydrophobic PMHS–SiO2 Coatings by Sol–Gel Method. Chin J Mater Res, 2010, 24(3): 266-272.
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Abstract The PMHS–SiO2 superhydrophobic coatings were prepared by sol–gel process. The preparation conditions, structure and properties of the coatings were investigated by contact angle measurement, Fourier transfer infrared spectroscopy (FTIR), Transmission electron microscope (TEM), Scanning electron microscope (SEM) and hygrothermal ageing. The results show that the contact angle of the coating reaches 163? and rolling angle is 3?–5? when the PMHS/SiO2 mass ratio is 1:1, modified time is 4 h, and heat–treated conditions are 170 ℃ for 3 h. The coatings also have good hygrothermal ageing resistance. The crosslinked PMHS–SiO2 hybrid materials was obtained due to the chemical combination between PMHS and SiO2 surfaces. The excellent superhydrophobic property of the coatings is due to dual effects of forming an appropriate surface roughness with micrometer–nanometer composite particles and the low surface energy of PMHS.
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Received: 14 January 2010
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| Fund: Supported by National Natural Science Foundtion of China Nos.50608034, 50873036, and the SRP Program and BaiBuTi Program of South China University of Technology. |
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