Robust Coatings via Catechol-Amine Codeposition: Mechanism, Kinetics, and Application
Robust Coatings via Catechol-Amine Codeposition: Mechanism, Kinetics, and Application
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DOI：
10.1021/acsami.7b18934
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发表时间：
2018-02-14
影响因子：
9.5
通讯作者：
Xu, Zhi-Kang
中科院分区：
文献类型：
--
作者：
Qiu, Wen-Ze;Wu, Guang-Peng;Xu, Zhi-Kang
生物启发的多酚/多胺共沉积已被证明的能力，表面改性，然而，包括机制和动力学的反应过程仍然肤浅的理解。本文研究了邻苯二酚（CA）与间苯二胺和哌嗪两种胺的反应。我们验证了伯胺和仲胺都容易通过迈克尔加成与CA连接，形成多酚/多胺低聚物在有氧和弱碱性条件下。分子模拟表明，迈克尔加成产物是占主导地位的芳香族和脂肪族胺与CA，这支持持久的化学和物理稳定性的共沉积涂层。首次提供了多酚/多胺的聚集动力学，并且形成的聚集体显示出高粘附性，其可以沉积为高性能纳滤膜的皮层。
Bioinspired polyphenol/polyamine codeposition has been demonstrated by the competence for surface modification; however, the reaction processes including mechanism and kinetics remain superficially understood. In this work, the catechol (CA)-amine reaction has been thoroughly investigated by using CA and two amines m-phenylenediamine and piperazine. We verify that both primary and secondary amines are prone to link with CA through Michael addition to form polyphenol/polyamine oligomers under aerobic and mild-alkaline conditions. Molecular simulations indicate that the Michael addition products are dominant for both aromatic and aliphatic amines with CA, which supports the durable chem- and phystability of the codeposited coatings. The aggregation kinetics of polyphenol/polyamine is provided for the first time, and the formed aggregates show high-adhesive properties, which can be deposited as the skin layers for high-performance nanofiltration membranes.