【作者】 张晗； 孙文； 王立达； 杨政清； 刘贵昌；

【Author】 Han Zhang;Wen Sun;Lida Wang;Zhengqing Yang;Guichang Liu;School of chemical engineering,DalianUniversity of Science and Technology;

【机构】 大连理工大学化工学院；

【摘要】 超疏水表面以其特殊的润湿性在自清洁、防污和防腐领域引起广泛关注。然而其机械强度和疏水性耐久性差限制了目前超疏水材料的实际应用。本文制备了一种微纳米结构的超疏水氟碳涂层,具有长效的超疏水性和防腐性。首先,结合多巴胺自聚合和溶胶凝胶法,在氧化石墨烯-聚多巴胺（GP）表面原位生长SiO₂,增强GP和SiO₂界面强度。然后,用1H,1H,2H,2H-全氟癸基三氯硅烷（FDTS）改性后,成功制备出接触角达175.54±1.3°,滚动角为0.85±0.23°的超疏水氟碳涂层。由于界面强度提高了,制得的超疏水涂层可以承受多种机械耐久性实验,包括300次的胶带剥离实验,200次的砂纸磨损实验,7升水滴冲击实验和300克的冲砂实验。另外,由于石墨烯片堆叠产生毛细作用,超疏水涂层在盐酸,氯化钠和氢氧化钠溶液（pH分别为1,7和12）中浸泡100天以及100天的紫外线照射后仍保持超疏水性。通过电化学测试,比较超疏水涂层和空白氟碳漆涂层在3.5wt.%氯化钠溶液中浸泡和干湿循环环境中的屏蔽性能。结果表明,由于超疏水涂层的微纳米结构形成气穴,超疏水涂层比空白涂层具有更优异的阻隔性能。因此,本文制备的超疏水涂层在海洋大气腐蚀防护应用中显现出卓越的性能。更多还原

【Abstract】 The superhydrophobic surface has attracted widespread attention in the fields of self-cleaning,anti-fouling and anti-corrosion due to its special wettability.However,the practical applications of superhydrophobic coatings are currently limited by their poor mechanical strength and hydrophobic durability.In this report,a superhydrophobic fluorocarbon（FC） coatingwith a micro-/nano-structure is prepared,which has long-lasting superhydrophobicity and corrosion protection.First,combining dopamine self-polymerization and sol-gel approaches,the interfacial strength between graphene-polydopamine（GP） and SiO₂ is enhanced by in-situ growth of SiO₂ on the GP surface.After modification with 1 H,1 H,2 H,2 H-perfluorodecyltrichlorosilane（FDTS）,the superhydrophobic FC/GP-SiO₂-FDTS coating（WCA=175.54 ± 1.3°,WSA=0.85 ± 0.23°） is successfully fabricated.As the interfacial strength enhanced,the as-prepared superhydrophobic coating can withstand various mechanical durability experiments including tape peeling test for 300 times,200 sandpaper abrasion cycles,droplets impact resistance for 7 L,or 300 g sand abrasion.Moreover,since the stack of graphene sheets has a capillary effect,the fabricated coating retains superhydrophobicity after immersion in HCl,NaCl and NaOH solution（pH=1,7,12,respectively）for 100 days or UV radiation for 100 days.Electrochemical measurements are performed to compare barrier properties of the superhydrophobic coating with blank FC coating during3.5 wt.% NaCl immersion and wet-dry cyclic test.The results demonstrate that the superhydrophobic coating can act as better barrier performance than the blank FC coating because of trapped air films in the micro-/nano-structures.Therefore,the fabricated superhydrophobic coating reveals extraordinary capability for application in marine atmospheric corrosion protection.更多还原