title: Self-Restoration of Superhydrophobicity on Shape Memory Polymer Arrays with Both Crushed Microstructure and Damaged Surface Chemistry.
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 O2plasma 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.
authors.affiliation: School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China.
authors.forename: Tong
authors.initials: T
authors.lastname: Lv
authors.affiliation: Natural Science Research Center, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin, 150090, P. R. China.
authors.forename: Zhongjun
authors.initials: Z
authors.lastname: Cheng
authors.affiliation: School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China.
authors.forename: Enshuang
authors.initials: E
authors.lastname: Zhang
authors.affiliation: School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China.
authors.forename: Hongjun
authors.initials: H
authors.lastname: Kang
authors.affiliation: School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, 150001, P. R. China.
authors.forename: Yuyan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Beijing National Laboratory of Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, P. R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Jiang
keywords: microstructures; self-healing materials; shape memory polymers; superhydrophobic materials; surface chemistry