Superamphiphobic and Electroactive Nanocomposite toward Self-Cleaning, Antiwear, and Anticorrosion Coatings.
Superamphiphobic and Electroactive Nanocomposite toward Self-Cleaning, Antiwear, and Anticorrosion Coatings.
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DOI：
10.1021/acsami.6b03961
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发表时间：
2016-05
影响因子：
9.5
通讯作者：
Ruixia Yuan;Shiqi Wu;Peng Yu;Baohui Wang;Liwen Mu;Xiguang Zhang;Yixing Zhu;Bin Wang;Huaiyuan Wang
中科院分区：
文献类型：
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作者：
Ruixia Yuan;Shiqi Wu;Peng Yu;Baohui Wang;Liwen Mu;Xiguang Zhang;Yixing Zhu;Bin Wang;Huaiyuan Wang
在新兴领域对多功能涂料的需求十分迫切。本文采用简易喷涂技术在铝基表面制备了具有优异的自清洁、耐磨和防腐性能的纳米复合涂层。将核壳结构聚苯胺/功能化碳纳米管(PANI/FCNTs)复合材料和纳米二氧化硅协同整合到乙烯四氟乙烯(ETFE)中构建荷叶状结构，并用1H，1H，2H，2H全氟辛基三乙氧基硅烷(POTS)降低表面能。当PANI/FCNTs含量为6wt%时，复合涂层具有超疏水性，对水、甘油和乙二醇的接触角分别为167°、163°和159°。该涂层在很宽的温度范围内(<；400°C)表现出稳定的非润湿性能，以及出色的自清洁能力，可防止污泥、浓硫酸和乙二醇的污染。经45000次磨损或弯曲试验30次后，仍能保持超疏水表面性质。涂层对腐蚀铝板具有较强的附着力(GB/T9286为1级)。超疏水表面在1mol/L盐溶液和3.5wt%氯化钠溶液中分别浸泡60d和90d后仍保持不变。值得注意的是，与裸ETFE涂层和不含PANI/FCNTs的ETFE复合涂层相比，该涂层显示出显著改善的防腐性能。这种具有综合功能的涂层在腐蚀/磨损环境下具有良好的自清洁和防腐应用前景。
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.