Fabrication of extreme wettability patterns with water-film protection for organic liquids |
| |
| Authors: | Shuai Huang Huanxi Zheng Jiyu Liu Jinlong Song Faze Chen Xiaolong Yang |
| |
| Institution: | Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian, China |
| |
| Abstract: | Selective fabrication of superhydrophilic (S-philic) region on a superhydrophobic (S-phobic) surface requires complex technology and high cost, which has limited applications of extreme wettability patterns. In this paper, a twice-chemical-etching approach without special modification is used to prepare the extreme wettability patterns. Superhydrophobicity and superhydrophilicity can be successfully achieved after twice chemical etching for 20 seconds. The obtained patterns can maintain their extreme wettability for at least 30 days. Functional platforms with single-S-philic and multi-S-philic regions are fabricated to manipulate water and various organic liquids with water-film protection in an air environment. |
| |
| Keywords: | Chemical etching extreme wettability patterns organic liquids water-film protection |
|
