材料科学
生物污染
涂层
化学工程
基质(水族馆)
扫描电子显微镜
表面能
X射线光电子能谱
傅里叶变换红外光谱
热重分析
表面张力
接触角
透射电子显微镜
十六烷
复合材料
纳米技术
化学
有机化学
膜
海洋学
物理
地质学
工程类
量子力学
生物化学
作者
Xianfeng Ou,Jiabing Cai,Jie Tian,Binghong Luo,Mingxian Liu
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2020-04-08
卷期号:8 (17): 6690-6699
被引量:45
标识
DOI:10.1021/acssuschemeng.0c00340
摘要
Superamphiphobic coating has significant applications in self-cleaning and antifouling materials. Herein, chitin nanocrystals (ChNCs) with a needlelike morphology as building blocks were modified by thiol groups and highly fluorinated long chains to reduce the surface free energy. For the prepared superamphiphobic ChNC particles, a series of morphological and physicochemical characterizations, such as transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, and X-ray photoelectron spectroscopy, were performed. The superamphiphobic ChNC particles feature high contact angles and low sliding angles for various liquids, including n-decane with a low surface tension (23.3 mN/m). Different liquid droplets can retain a perfectly quasispherical shape on the coating surface. Most interestingly, liquid marbles wrapped up by this superamphiphobic powder can “stand” on various substrates without any collapse. The coating shows a good repellency for liquids after the mechanical damage tests and thermal treatments. In addition, the superamphiphobic ChNC particles could be applied onto various substrates, exhibiting a good resistance and substrate-independent performance. In sum, the fluorinated ChNC coatings with superior superamphiphobicity, substrate independence, and stable mechanical and thermal properties show promising applications of water/oil-proof, self-cleaning, and antifouling coatings.
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