Abstract:

ZnO microrod films has been prepared by simple low temperature hydrothermal approach. The films treated with octyltrimethoxysilane and dodecafluoroheptylpropyltrimethoxylsilane show super-hydrophobic properties. The static contact angles for water are (150±1.3)° and (155±1.5)°, and the slide angles are about 5° and 3°, respectively. It is believed that the super-hydrophobic property of the modified ZnO microrod films is mainly caused by the microstructures of the films and the modification of octyltrimethoxysilane or dodecafluoroheptyl-propyl-trimethoxylsilane with low surface energy on surfaces. The wettability of the ZnO submicrorod films is also discussed on the basis of Cassie theory.

Key words: ZnO microrod film, contact angle, super-hydrophobicity