Sprayable superhydrophobic coating with high processibility and rapid damage-healing nature
Sprayable superhydrophobic coating with high processibility and rapid damage-healing nature
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DOI：
10.1016/j.cej.2020.124834
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发表时间：
2020-07-15
影响因子：
15.1
通讯作者：
Yao, Xi
中科院分区：
文献类型：
--
作者：
Cao, Chunyan;Yi, Bo;Yao, Xi
同时表现出高基材结合性、机械鲁棒性和损伤修复性能的超疏水涂层对于实际应用具有重要意义。在这项工作中，开发了一种有效的有机硅涂料，首次制备出具有上述性能的超疏水涂层。该涂料由超分子有机硅聚合物和二氧化硅纳米颗粒配制而成，可以喷涂在固体基材上并组装成具有增强防水性的多孔薄膜。超分子有机硅聚合物中丰富的氢键和配位键提供了额外的底物结合和损伤修复特性。该涂层在胶带剥离、砂纸磨损和水下放置等一系列测试中仍能保持防水性。由于超分子聚合物的动态分子间交联和化学重组，它们可以通过简单的热处理反复修复化学和形貌缺陷。所开发的超疏水涂层凭借其高加工性、多方面的坚固性和固有的修复能力，在液体运输、油水分离、防冰和减阻等领域具有广阔的应用前景。
Superhydrophobic coatings simultaneously exhibiting high substrate binding, mechanical robustness and damage-healing properties are of great significance for practical applications. In this work, an effective silicone-based paint was developed to prepare superhydrophobic coating for the first time with the abovementioned properties. The paint is formulated with supramolecular silicone polymers and silica nanoparticles, which can be sprayed on solid substrates and assembled into porous films with enhanced water repellency. The abundant hydrogen bonds and coordination bonds in the supramolecular silicone polymers provided additional substrate binding and damage-healing properties. The coating can maintain water-repellency upon a series of tests including tape peeling, sandpaper abrasion and underwater placement. They can repeatedly heal chemical and topographical defects by simple thermal treatment due to the dynamic intermolecular crosslinking and chemical reorganization of the supramolecular polymers. Taking advantages of their high processibilty, multifaceted robustness and inherent healing ability, the developed superhydrophobic coatings hold great promise for applications in liquid transportation, oil-water separation, anti-icing and drag reduction.