Reversible Superhydrophobic-Superhydrophilic Transition of ZnO Nanorod/Epoxy Composite Films

被引：110

作者：

Liu, Yan ^{[1
]}

Lin, Ziyin ^{[1
]}

Lin, Wei ^{[1
]}

Moon, Kyoung Sik ^{[1
]}

Wong, C. P. ^{[1
,2
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Chinese Univ Hong Kong, Fac Engn, Shatin, Hong Kong, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2012年 / 4卷 / 08期

基金：

美国国家科学基金会;

关键词：

reversible wettability; ZnO nanocomposite films; UV irradiation; SURFACE WETTABILITY; FIELD-EMISSION; FABRICATION; UV; NANOWIRES;

D O I：

10.1021/am300778d

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Tuning the surface wettability is of great interest for both scientific research and practical applications. We demonstrated reversible transition between superhydrophobicity and superhydrophilicity on a ZnO nanorod/epoxy composite film. The epoxy resin serves as an adhesion and stress relief layer. The ZnO nanorods were exposed after oxygen reactive ion etching of the epoxy matrix. A subsequent chemcial treatment with fluoroalkyl and alkyl silanes resulted in a superhydrophobic surface with a water contact angle up to 158.4 degrees and a hysteresis as low as 1.3 degrees. Under UV irradiation, the water contact angle decreased gradually, and the surface eventually became superhydrophilic because of UV induced decomposition of alkyl silanes and hydroxyl absorption on ZnO surfaces. A reversible transition of surface wettability was realized by alternation of UV illumination and surface treatment. Such ZnO nanocomposite surface also showed improved mechanical robustness.

引用

页码：3959 / 3964

页数：6

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