Design and preparation of biomimetic polydimethylsiloxane (PDMS) films with superhydrophobic, self-healing and drag reduction properties via replication of shark skin and SI-ATRP

Yibin Liu, Huimin Gu, Yu Jia, Jin Liu, Hao Zhang, Rumin Wang, Baoliang Zhang, Hepeng Zhang, Qiuyu Zhang

科研成果: 期刊稿件文章同行评审

229 引用 (Scopus)

摘要

Nature has provided a lot of important inspirations for human beings to create artificial methods to mimic the excellent performance of biological systems. Based on the shark skin pattern microstructure, the low surface energy and stimuli-responsive behavior of the poly(2-perfluorooctylethyl methacrylate) (PFMA) brush, a biomimetic PDMS film with superhydrophobic, self-healing and drag reduction properties was prepared by first replication of shark skin surface on PDMS film, followed by treatment with surface-initiated atom transfer radical polymerization (SI-ATRP) of FMA. The PFMA brushes can self-assemble into different hierarchical structures in ethanol or DMF, which make the biomimetic PDMS films show different contact angles. Having been damaged by finger-wipe with and without water respectively, the water repellency of the biomimetic PDMS films decreased. However, the surfaces recovered superhydrophobic property just by immersing the destroyed PDMS films into DMF which is good solvent for PFMA. The SEM images and XPS results demonstrated the changes of structure and chemical compositions of the biomimetic PDMS films surface in damage and self-healing processes. Rotational viscometer result showed the drag reduction rate of the biomimetic PDMS films surface can reach up to 21.7%. This research is expected to supply a novel method of controlling polymer brushes’ self-assembly to prepare superhydrophobic and self-healing films.

源语言英语
页(从-至)318-328
页数11
期刊Chemical Engineering Journal
356
DOI
出版状态已出版 - 15 1月 2019

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