Effect of Dew Condensation on the Wettability of Rough Hydrophobic Surfaces Coated with Two Different Silanes

被引：53

作者：

Furuta, Tsutomu ^{[1
,2
]}

Sakai, Munetoshi ^{[2
]}

Isobe, Toshihiro ^{[1
]}

Nakajima, Akira ^{[1
,2
]}

机构：

[1] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan

[2] Kanagawa Acad Sci & Technol, Takatsu Ku, Kawasaki, Kanagawa 2130012, Japan

来源：

LANGMUIR | 2010年 / 26卷 / 16期

关键词：

SUPERHYDROPHOBIC SURFACES; WETTING TRANSITIONS; ULTRAHYDROPHOBIC SURFACES; WATER DROPLETS; FILMS; PLASMA; POLY(TETRAFLUOROETHYLENE); TRANSPARENT; STATES; DROPS;

D O I：

10.1021/la101663a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Dew condensation effects on the wettability of rough and smooth coatings of two fluoroalkylsilanes (FAS3 and FAS17) were investigated by controlling the temperature. Contact angles of the coatings decreased concomitantly with decreasing surface temperature. Inflection points in the temperature dependence of contact angles were observed at the dew point. They were attributable to the change of the interfacial free energy of the solid gas interface by water adsorption. The contact angle decrease suggested a mode transition from Cassie to Wenzel on the rough surface, and resulted from the surface wettability change and the increase of the condensation amount of water. The contact angle change by increasing temperature from -6 degrees C revealed that the Wenzel mode is more stable than Cassie's mode.

引用

页码：13305 / 13309

页数：5

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