Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (1): 142-153.DOI: 10.19894/j.issn.1000-0518.210486

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Research Progress on Condensation⁃Induced Invalid of Super⁃hydrophobicity

ZHANG Wen-Jing1,WANG De-Hui1,2(),DENG Xu2   

  1. 1.Yangtze Delta Region Institute of University of Electronic Science and Technology of China,Huzhou 313000,China
    2.Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology,Chengdu 610054,China
  • Received:2021-09-30 Accepted:2021-11-01 Published:2022-01-01 Online:2022-01-10
  • Contact: De-Hui WANG
  • About author:wangdehui@uestc.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22072014);the Program for Scientific?Technical Young Talents of Sichuan(2021JDJQ0013);Sichuan Science and Technology Program(2021JDRC0016);the Key Projects in International Science & Technology Cooperation Program of Chengdu, Sichuan(2021?GH02?00105?HZ)

Abstract:

The water vapor condenses on solid surface in the presence of subcooling or supersaturation. Based on the wettability principles, the radius of condensed droplets decrease with subcooling increases, which contributed to the condenses of droplets in the gaps between micro/nano structures on the superhydrophobic surfaces. The condensed droplet would wet the surface if it sticks on the surface during condensation, which would destroy the super-hydrophobicity of the surface, even result in flooding. The previous research to anti-invalid of super-hydrophobicity during condensation could be classified into three modes: optimization of the micro/nano structure of surface, improvement in spatial selectivity of nucleation and introduction of external energy. Even though the methods above improved greatly in maintaining super-hydrophobicity during condensation, no one could prevent the infiltration of the droplets into the gaps between micro/nano structures. Therefore, the application of superhydrophobic surface depends highly on the wetting properties of the surface during condensation.

Key words: Superhydrophobic surface, Condensation, Wetting transition

CLC Number: