Robust superhydrophobic wood obtained by spraying silicone nanoparticles

被引:40
作者
Chu, Zonglin [1 ]
Seeger, Stefan [1 ]
机构
[1] Univ Zurich, Dept Chem, CH-8057 Zurich, Switzerland
来源
RSC ADVANCES | 2015年 / 5卷 / 28期
基金
瑞士国家科学基金会;
关键词
SUPEROLEOPHOBIC COATINGS; SURFACES; WATER; FABRICATION; NANOFILAMENTS; RESISTANCE; SUBSTRATE; FILMS;
D O I
10.1039/c4ra13794a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Silica nanoparticles, usually synthesized via Stober reactions in the presence of a suitable amount of an ammonia catalyst, are frequently used in the fabrication of self-cleaning surfaces. However, to achieve superhydrophobicity, the nanosilica-modified surfaces need to be further functionalized with lowsurface-energy materials. Here, we report the preparation of polymethylsiloxane nanoparticles in a facile way, i.e., the hydrolysis of trichloromethylsilane in toluene under ambient conditions in the absence of a catalyst. The resulting gel-like solution can be applied to substrate surfaces by the convenient method of spraying. Wood slides were used as substrates, and the spray-coated wood without any further surface elaboration became extremely superhydrophobic. Notably, it was observed that the superhydrophobicity of the coated wood is mechanically stable against repeated finger rubbing because of the macroscale and microscale roughness of the wood surfaces that serve as a barrier against mechanical damage.
引用
收藏
页码:21999 / 22004
页数:6
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