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Superamphiphobic Surfaces with Self-Cleaning and Antifouling Properties by Functionalized Chitin Nanocrystals
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-04-08 , DOI: 10.1021/acssuschemeng.0c00340 Xianfeng Ou 1 , Jiabing Cai 1 , Jinhuan Tian 1 , Binghong Luo 1 , Mingxian Liu 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-04-08 , DOI: 10.1021/acssuschemeng.0c00340 Xianfeng Ou 1 , Jiabing Cai 1 , Jinhuan Tian 1 , Binghong Luo 1 , Mingxian Liu 1
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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.
中文翻译：
功能化几丁质纳米晶体具有自洁和防污性能的超憎水表面
超疏水涂层在自清洁和防污材料中具有重要的应用。在这里，具有针状形态的几丁质纳米晶体（ChNCs）作为构建基块被巯基和高度氟化的长链修饰，以减少表面自由能。对于制备的超两亲性ChNC粒子，进行了一系列形态和物理化学表征，例如透射电子显微镜，扫描电子显微镜，傅立叶变换红外光谱，X射线衍射，热重分析和X射线光电子能谱。超疏水ChNC颗粒对各种液体（包括n和n）都具有高接触角和低滑动角-癸烷，表面张力低（23.3 mN / m）。不同的液滴可以在涂层表面上保持完美的准球形。最有趣的是，被这种超两性粉末包裹的液体大理石可以“站立”在各种基材上而不会塌陷。经过机械损伤测试和热处理后，涂层对液体显示出良好的排斥性。此外，超疏水的ChNC颗粒可应用于各种基材，表现出良好的抗性和与基材无关的性能。总而言之，氟化ChNC涂层具有超强的两亲性，基材独立性以及稳定的机械和热性能，显示出有希望的防水/防油，自清洁和防污涂料应用。
更新日期：2020-04-08
中文翻译：
功能化几丁质纳米晶体具有自洁和防污性能的超憎水表面
超疏水涂层在自清洁和防污材料中具有重要的应用。在这里，具有针状形态的几丁质纳米晶体（ChNCs）作为构建基块被巯基和高度氟化的长链修饰，以减少表面自由能。对于制备的超两亲性ChNC粒子，进行了一系列形态和物理化学表征，例如透射电子显微镜，扫描电子显微镜，傅立叶变换红外光谱，X射线衍射，热重分析和X射线光电子能谱。超疏水ChNC颗粒对各种液体（包括n和n）都具有高接触角和低滑动角-癸烷，表面张力低（23.3 mN / m）。不同的液滴可以在涂层表面上保持完美的准球形。最有趣的是，被这种超两性粉末包裹的液体大理石可以“站立”在各种基材上而不会塌陷。经过机械损伤测试和热处理后，涂层对液体显示出良好的排斥性。此外，超疏水的ChNC颗粒可应用于各种基材，表现出良好的抗性和与基材无关的性能。总而言之，氟化ChNC涂层具有超强的两亲性，基材独立性以及稳定的机械和热性能，显示出有希望的防水/防油，自清洁和防污涂料应用。
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