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Construction of MOF-based superhydrophobic composite coating with excellent abrasion resistance and durability for self-cleaning, corrosion resistance, anti-icing, and loading-increasing research
Chemical Engineering Journal ( IF 15.1 ) Pub Date : 2020-10-15 , DOI: 10.1016/j.cej.2020.127343
Huaiyin Chen , Fangfang Wang , Huizhou Fan , Ruoyu Hong , Weihua Li

A superhydrophobic composite coating was facilely constructed based on MOF (ZIF-8) nanoparticles and organic resin. Hydrophilic ZIF-8 nanoparticles with hydroxyl group were firstly prepared in aqueous media at room temperature, and then modified with low surface energy perfluorooctyltriethoxysilane (POTS) through hydrolytic condensation to give a superhydrophobic paint. Additionally, epoxy resin (EP) was innovatively introduced as adhesive layer to improve the robustness and adhesive force of the superhydrophobic coating. The as-prepared ZIF-8/POTS/EP composite coating showed high water-repellency (water contact angle = 168.2 °), mechanical and chemical robustness, and durability that it could maintain the superhydrophobicity after weathering in air for 300 days or immersing in 3.5 wt.% NaCl aqueous solution for 60 days. The superhydrophobic composite coating also possessed excellent performance in self-cleaning, corrosion resistance, anti-icing and loading-increasing. Noteworthily, for the corrosion resistance, the ZIF-8/POTS/EP coating could increase the impedance modulus (at 0.01 Hz) of Q235 steel by about 7 orders of magnitude after immersion in 3.5 wt.% NaCl aqueous solution for 7 days. We believe that this work can not only promote the effortless and large-scale preparation of superhydrophobic surface and their practical applications in future, but also provide a novel way for applying MOF materials into more fields.



中文翻译:

具有优异耐磨性和耐用性的MOF基超疏水复合涂层的构建,可用于自清洁,耐腐蚀,防冰和增加载荷的研究

基于MOF(ZIF-8)纳米颗粒和有机树脂,可轻松构建超疏水复合涂层。首先在室温下在水性介质中制备具有羟基的亲水性ZIF-8纳米粒子,然后通过低表面能全氟辛基三乙氧基硅烷(POTS)进行水解缩合改性,得到超疏水性涂料。此外,创新地引入了环氧树脂(EP)作为粘合层,以提高超疏水涂层的坚固性和粘合力。所制备的ZIF-8 / POTS / EP复合涂层显示出高拒水性(水接触角= 168.2°),机械和化学强度以及耐用性,可以在空气中风化300天或浸入水中后保持超疏水性。 3.5重量%的NaCl水溶液60天。该超疏水复合涂层在自清洁,耐腐蚀,防冰和增加载荷方面也具有优异的性能。值得注意的是,就抗腐蚀性而言,将ZIF-8 / POTS / EP涂层浸入3.5 wt。%NaCl水溶液7天后,可使Q235钢的阻抗模量(在0.01 Hz时)提高约7个数量级。我们相信,这项工作不仅可以促进超疏水表面的简便,大规模制备及其在未来的实际应用,而且为将MOF材料应用于更多领域提供了一种新颖的途径。在将Q235钢浸入3.5 wt。%的NaCl水溶液中7天后,将其大约7个数量级的QHz钢(01 Hz)。我们相信,这项工作不仅可以促进超疏水表面的简便,大规模制备及其在未来的实际应用,而且为将MOF材料应用于更多领域提供了一种新颖的途径。在将Q235钢浸入3.5 wt。%的NaCl水溶液中7天后,将其大约7个数量级的QHz钢(01 Hz)。我们相信,这项工作不仅可以促进超疏水表面的简便,大规模制备及其在未来的实际应用,而且为将MOF材料应用于更多领域提供了一种新颖的途径。

更新日期:2020-10-16
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