Department of Chemistry , Indian Institute of Technology-Guwahati , Kamrup , Assam 781039 , India.
ACS Appl Mater Interfaces. 2018 Jul 18;10(28):23451-23457. doi: 10.1021/acsami.8b06924. Epub 2018 Jul 9.
In this letter, a single polymer is rapidly and covalently transformed into a chemically reactive and functional bulk polymeric coatings through a catalyst-free mutual chemical reaction between acrylates and amine groups at ambient condition-in the absence of any external reaction solvent, which is unprecedented in the literature. This facile and green chemical approach provided a common basis for achieving two distinct biomimicked wettabilities-that are superhydrophobicity (lotus-leaf mimicked) in air and superoleophobicity (fish-scale inspired) under water. The essential chemistry that conferred bioinspired wettability was optimized in the hierarchically featured polymeric material by postcovalent modulation of chemically reactive polymeric material with primary-amine-containing small moleculess, glucamine and octadecylamine. The inherently sticky and "chemically reactive" polymeric material having appropriate hierarchical topography is highly capable of providing substrate-independent (irrespective of chemical compositions and mechanical strength of the substrates) stable coatings with robust bioinspired (i.e., lotus leaf and fish scale) wettability.
在这封信中，一种单一的聚合物在环境条件下（在没有任何外部反应溶剂的情况下）通过丙烯酸酯和胺基之间的无催化剂相互化学反应，快速且共价地转化为化学活性和功能的块状聚合涂层，这在文献中是前所未有的。这种简单且环保的化学方法为实现两种截然不同的仿生润湿性提供了共同基础，即在空气中具有超疏水性（模仿荷叶），在水下具有超疏油性（受鱼鳞启发）。通过用含有伯胺的小分子、葡糖胺和十八胺对化学活性聚合材料进行后共价修饰，在具有分级特征的聚合材料中优化了赋予仿生润湿性的基本化学性质。具有适当分级形貌的固有粘性和“化学活性”聚合材料具有高度的能力，可以为具有稳健仿生（即荷叶和鱼鳞）润湿性的基底独立（与基底的化学成分和机械强度无关）稳定涂层。
