Superhydrophobic Hierarchical Honeycomb Surfaces

被引：66

作者：

Brown, P. S. ^{[1
]}

Talbot, E. L. ^{[1
]}

Wood, T. J. ^{[1
]}

Bain, C. D. ^{[1
]}

Badyal, J. P. S. ^{[1
]}

机构：

[1] Univ Durham, Dept Chem, Sci Labs, Durham DH1 3LE, England

来源：

LANGMUIR | 2012年 / 28卷 / 38期

基金：

英国工程与自然科学研究理事会;

关键词：

POROUS POLYMER-FILMS; SUPER-HYDROPHOBIC SURFACES; BREATH FIGURES; SELF-ORGANIZATION; PATTERNED FILMS; SOLID-SURFACES; LENGTH SCALES; WATER; DROPLETS; PLASMA;

D O I：

10.1021/la302719m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two-dimensional hexagonally ordered honeycomb surfaces have been created by solvent casting polybutadiene films under controlled humidity. Subsequent CF4 plasmachemical fluorination introduces cross-linking and surface texturing, leading to hierarchical surfaces with roughness on both the 10 pm (honeycomb) and micrometer (texturing) length scales. For microliter droplets, these display high water contact angle values (>170 degrees) in combination with low contact angle hysteresis (i.e., superhydrophobicity) while displaying bouncing of picoliter water droplets. In the case of picoliter droplets, it is found that surfaces which exhibit similar static contact angles can give rise to different droplet impact dynamics, governed by the underlying surface topography. These studies are of relevance to technological processes such as rapid cooling, delayed freezing, crop spraying, and inkjet printing.

引用

页码：13712 / 13719

页数：8

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