Scraping-Induced Superhydrophobicity on Polymer Surfaces: Experiment and Lattice Boltzmann Simulation

GUO Chaowei; REN Qingwei

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Scraping-Induced Superhydrophobicity on Polymer Surfaces: Experiment and Lattice Boltzmann Simulation

GUO Chaowei 1 * #,REN Qingwei 2

1.School of Materials Science and Engineering, Xi\'an Jiaotong University, Xi\'an 710049

2.State Key Labortary for Mechnical Behavior of Metals, Xi\'an 710049

*Correspondence author

#Submitted by

Subject:

Funding: Doctoral Fund of Ministry of Education of China（No.No.20090201120011）

Opened online:28 December 2012

Accepted by: none

Citation: GUO Chaowei,REN Qingwei.Scraping-Induced Superhydrophobicity on Polymer Surfaces: Experiment and Lattice Boltzmann Simulation[OL]. [28 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4508323

We report a scraping-induced surface modification method to produce superhydrophobicity. The proposed method allows easy large-scale manufacturing of surface superhydrophobicity. Experimental contact angles on seven polymer surfaces were reported. The largest water contact angle was found to be 160.0 on manufactured rough PTFE surfaces. Numerical simulations by means of a lattice Boltzmann method were also performed to examine the effect of trapped air on the wettability or superhydrophobicity. We found that contact angle increases with the amount of trapped air at the solid-liquid interface, in general agreement with experimental results.

Keywords:Physical Chemistry; Superhydrophobicity; Surface roughness; Lattice Boltzmann Model

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