Wetting behaviors of ethanol/water on rough PTFE surface

被引：6
|
作者：
Chen Ying [1 ]
Wang Hao [1 ]
Wang Chang-Song [1 ]
Feng Xin [1 ]
Lu Xiao-Hua [1 ]
机构：
[1] Nanjing Univ Technol, Coll Chem & Chem Engn, Nanjing 210009, Peoples R China
来源：
ACTA PHYSICO-CHIMICA SINICA | 2007年 / 23卷 / 08期
基金：
中国国家自然科学基金;
关键词：
PTFE; rough; wettability; ethanol/water;
D O I：
10.1016/S1872-1508(07)60062-X
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The wetting behaviors of ethanol/water solutions with different surface tensions were studied on the rough superhydrophobic polytetrafluoroethylene (PTFE) coating. Air fraction was calculated using Cassie equation and the forces were compared. The result indicated that the ethanol/water solutions gradually filled in the multilevel structures of the PTFE coating with the decrease in the surface tension. Only the stripe structure was filled when the surface tension was greater than 28 mN center dot m(-1). When the surface tension was less than 28 mN center dot m(-1), the papillary structure was also filled. Because it has little contribution to the air fraction, the surface could not be wetted when the stripe structure was filled. However, the surface could be wetted by the solutions when the papillary structure, which had a considerable contribution to the air fraction, was filled.
引用
收藏
页码：1168 / 1172
页数：5
相关论文
共 20 条
  • [1] Liquid marbles
    Aussillous, P
    Quéré, D
    [J]. NATURE, 2001, 411 (6840) : 924 - 927
  • [2] Patterned Ag film with superhydrophobic properties
    Bai Shuo
    Yang Ling-Lu
    Zhang Mao-Feng
    Yang Zhao-Hui
    Zhang Zhi-Feng
    Cao Wei-Xiao
    [J]. ACTA PHYSICO-CHIMICA SINICA, 2006, 22 (10) : 1296 - 1299
  • [3] PTFE as a masking material for MEMS fabrication
    Bodas, DS
    Gangal, SA
    [J]. JOURNAL OF MICROMECHANICS AND MICROENGINEERING, 2005, 15 (04) : 802 - 806
  • [4] Wettability of porous surfaces.
    Cassie, ABD
    Baxter, S
    [J]. TRANSACTIONS OF THE FARADAY SOCIETY, 1944, 40 : 0546 - 0550
  • [5] Is the lotus leaf superhydrophobic?
    Cheng, YT
    Rodak, DE
    [J]. APPLIED PHYSICS LETTERS, 2005, 86 (14) : 1 - 3
  • [6] Designing for optimum liquid repellency
    Extrand, CW
    [J]. LANGMUIR, 2006, 22 (04) : 1711 - 1714
  • [7] Super-hydrophobic surfaces: From natural to artificial
    Feng, L
    Li, SH
    Li, YS
    Li, HJ
    Zhang, LJ
    Zhai, J
    Song, YL
    Liu, BQ
    Jiang, L
    Zhu, DB
    [J]. ADVANCED MATERIALS, 2002, 14 (24) : 1857 - 1860
  • [8] Multiple equilibrium droplet shapes and design criterion for rough hydrophobic surfaces
    He, B
    Patankar, NA
    Lee, J
    [J]. LANGMUIR, 2003, 19 (12) : 4999 - 5003
  • [9] LU XH, 2005, Patent No. 200510095423
  • [10] Non-stick water
    Mahadevan, L
    [J]. NATURE, 2001, 411 (6840) : 895 - 896
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