期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 137, 期 -, 页码 78-86出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2016.10.023
关键词
Superhydrophobic; Thiol-ene; Interpenetrating polymer networks (IPN); Self-healing
资金
- National High Technology Research and Development Program of China (863 Program) [2012AA02A404]
- Key Program of the National Natural Science Foundation of China [51433008]
- General Program of the National Natural Science Foundation of China [51173146]
In this work, we present one-step dip-coating strategy for fabricating robust, self-healing and super hydrophobic coatings using a coating solution that contains a novel branched thiol-ene fluorinated siloxane (T-FAS), polydimethylsiloxane (PDMS) elastomer and hydrophobic fumed silica nanoparticles (SiO2 NPs). The novel branched T-FAS, with low fluorinated surface energy and high sol-gel reactivity, was prepared by introducing (N-methyl-perfluorohexane-l-sulfonamide) ethyl acrylate (FSA) and gamma-methacryloxypropyltrimethoxysilane (MPS) into pentaerythritol tetra (3-mercaptopropionate) (PETMP) via thiol-ene click reaction. The superhydrophobic coating, being high stable to strong acid, UV, thermal and smudge treatment, has a water contact angle of 165 2 and shedding angle of 4 +/- 1 degrees. It can withstand at least 100 cycles of abrasion with 1500 grit sandpaper under 45 KPa due to the interpenetrating polymer networks (IPN) constructed by T-FAS/PDMS. The IPN is also self-healing to chemically etching using long perfluoro-terminated chains of T-FAS which can spontaneously reorient to new air interfaces. The robust self-healing IPN may lead to the development of new efficient strategies for durable protective coatings in various applications. (C) 2016 Elsevier Ltd. All rights reserved.
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