Self-restoration of superhydrophobicity on shape memory polymer arrays with both crushed microstructure and damaged surface chemistry

Tong Lv, Zhongjun Cheng, Enshuang Zhang, Hongjun Kang, Yuyan Liu, Lei Jiang

Research output: Contribution to journalArticleResearchpeer-review

63 Citations (Scopus)

Abstract

Recently, self-healing superhydrophobic surfaces have become a new research focus due to their recoverable wetting performances and wide applications. However, until now, on almost all reported surfaces, only one factor (surface chemistry or microstructure) can be restored. In this paper, a new superhydrophobic surface with self-healing ability in both crushed microstructure and damaged surface chemistry is prepared by creating lotus-leaves-like microstructure on the epoxy shape memory polymer (SMP). Through a simple heating process, the crushed surface microstructure, the damaged surface chemistry, and the surface superhydrophobicity that are destroyed under the external pressure and/or O2 plasma action can be recovered, demonstrating that the obtained superhydrophobic surface has a good self-healing ability in both of the two factors that govern the surface wettability. The special self-healing ability is ascribed to the good shape memory effect of the polymer and the reorganization effect of surface molecules. This paper reports the first use of SMP material to demonstrate the self-healing ability of surface superhydrophobicity, which opens up some new perspectives in designing self-healing superhydrophobic surfaces. Given the properties of this surface, it could be used in many applications, such as self-cleaning coatings, microfluidic devices, and biodetection.

Original languageEnglish
Article number1503402
Number of pages8
JournalSmall
Volume13
Issue number4
DOIs
Publication statusPublished - 25 Jan 2017
Externally publishedYes

Keywords

  • microstructures
  • self-healing materials
  • shape memory polymers
  • superhydrophobic materials
  • surface chemistry

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