Provincial Key Laboratory of Oil and Gas Chemical Technology, College of Chemistry and Chemical Engineering, Northeast Petroleum University , Daqing 163318, China.
Intelligent Composites Laboratory, Department of Chemical and Biomolecular Engineering, The University of Akron , Akron, Ohio 44325, United States.
ACS Appl Mater Interfaces. 2016 May 18;8(19):12481-93. doi: 10.1021/acsami.6b03961. Epub 2016 May 6.
Multifunctional coatings are in urgent demand in emerging fields. In this work, nanocomposite coatings with extraordinary self-cleaning, antiwear, and anticorrosion properties were prepared on aluminum substrate by a facile spraying technique. Core-shell structured polyaniline/functionalized carbon nanotubes (PANI/fCNTs) composite and nanosized silica were synergistically integrated into ethylene tetrafluoroethylene (ETFE) matrix to construct lotus-leaf-like structures, and 1H,1H,2H,2H- perfluorooctyltriethoxysilane (POTS) was used to decrease the surface energy. The composite coating with 6 wt % PANI/fCNTs possesses superamphiphobic property, with contact angles of 167°, 163°, and 159° toward water, glycerol, and ethylene glycol, respectively. This coating demonstrates stable nonwetting performance over a wide temperature range (<400 °C), as well as outstanding self-cleaning ability to prevent contamination by sludge, concentrated H2SO4, and ethylene glycol. Superamphiphobic surface property could be maintained even after 45 000 times abrasion or bending test for 30 times. The coating displayed strong adhesive ability (grade 1 according to the GB/T9286) on the etched aluminum plate. The superamphiphobic surface could be retained after immersion in 1 mol/L HCl and 3.5 wt % NaCl solutions for 60 and 90 d, respectively. It should be noted that this coating reveals significantly improved anticorrosion performance as compared to the bare ETFE coating and ETFE composite coating without PANI/fCNTs. Such coatings with integrated functionalities offer promising self-cleaning and anticorrosion applications under erosive/abrasive environment.
多功能涂层在新兴领域有着迫切的需求。在这项工作中，通过简便的喷涂技术在铝基底上制备了具有优异自清洁、抗磨损和耐腐蚀性能的纳米复合涂层。核壳结构的聚苯胺/功能化碳纳米管（PANI/fCNTs）复合材料和纳米二氧化硅协同集成到乙烯四氟乙烯（ETFE）基体中，构建出具有荷叶般结构的涂层，并使用 1H,1H,2H,2H-全氟辛基三乙氧基硅烷（POTS）降低表面能。含有 6wt% PANI/fCNTs 的复合涂层具有超双疏性能，对水、甘油和乙二醇的接触角分别为 167°、163°和 159°。该涂层在较宽的温度范围内（<400°C）表现出稳定的不润湿性能，并且具有出色的自清洁能力，可以防止污泥、浓硫酸和乙二醇的污染。即使经过 45000 次磨损或 30 次弯曲测试，超双疏表面性能仍能保持。该涂层在经过蚀刻的铝板上具有较强的附着力（根据 GB/T9286 为 1 级）。在分别浸泡在 1mol/L HCl 和 3.5wt%NaCl 溶液 60 和 90 天后，仍能保持超双疏表面。值得注意的是，与裸露的 ETFE 涂层和不含 PANI/fCNTs 的 ETFE 复合涂层相比，这种涂层具有显著提高的耐腐蚀性能。这种具有综合功能的涂层在侵蚀/磨损环境下具有很有前景的自清洁和耐腐蚀应用。
