Effects of modifiers on the hydrophobicity of SiO2 films from nano-husk ash

被引:12
作者
Xu, Kejing [1 ]
Sun, Qingwen [1 ]
Guo, Yanqing [1 ]
Dong, Shuhua [1 ]
机构
[1] Shandong Univ Technol, Sch Mat Sci & Engn, Zibo 255049, Peoples R China
关键词
Super-hydrophobicity; SiO2; film; Modifier; Contact angle; Nano-husk ash; SOL-GEL METHOD; RICE-HUSK; SUPERHYDROPHOBIC SURFACES; SILICA PARTICLES; HYDROLYSIS; KINETICS; FILMS;
D O I
10.1016/j.apsusc.2013.03.173
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Nano-husk ashes were prepared by burning rice-husk with self-propagating method. The super-hydrophobic SiO2 films from nano-husk ash were prepared by sol-gel method using hydroxy silicone oil (HSO), hexamethyldisilazane (HMS), or methyl triethoxysilane (MTS) as modifiers. The effects of modifiers on the hydrophobic property of SiO2 films were studied, and the performances were characterized by the XRD, UV-vis, BET, EDS, SEM, IR, and Contact Angle Analyzer. The results showed that the contact angle of SiO2 films was more than 160 degrees when volume ratio of the modifiers to silicon-sodium solution (SSS) was 0.15. The mechanism of modifiers on SiO2 surfaces is a graft copolymerization. The hydrophobic groups in the modifiers replace the hydroxy groups on SiO2 surfaces and make SiO2 surfaces present super-hydrophobicity. (c) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:796 / 801
页数:6
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