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《Acta Materiae Compositae Sinica》 2017-01
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Preparation of superhydrophobic surface based on SiC/Al composite

BAO Xiaohui;MING Pingmei;BI Xiangyang;QIN Ge;School of Mechanical and Power Engineering,Henan Polytechnic University;  
The chemical etching technique was applied to prepare surface texture of SiC/Al composites.The microtopography characteristics and wetting behaviors of the etched surfaces as well as their dependencies on etching time were analyzed by SEM and a contact angle meter.The temperature shock resistance of the SiC/Al superhydrophobic surfaces were evaluated by thermal shock tests.The results indicate that SiC/Al composite can be easily etched chemically to form distinct hierarchical structures integrating particle-shaped microstructures and nano-sized pit structures mainly due to the existence of SiC microparticles served as the bodies of microstructure,the etched surfaces modified by fluorosilane coating show excellent superhydrophobicity with a water contact angle of up to 166.8°and a small slide angle of as low as 3°,the SiC/Al superhydrophobic surfaces possess a favorable temperature shock resistance.
【Key Words】: superhydrophobicity SiC/Al composite chemical etching hierarchical structure self-cleaning
【Fund】: 国家自然科学基金(51475149);; 河南省高校科技创新团队支持计划(15IRTSTHN013);; 河南理工大学科技创新团队支持计划(T2014-1)
【CateGory Index】: TB333;TB306
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