Abstract In this paper, we report a simple method for preparing a highly effective antibacterial coating by the introduction of an N-halamine structure on a polydopamine (PDA)-based coating. The PDA-based coating includes only PDA and PDA co-deposited with polyethylenimine (PEI). The amine groups in PDA and PEI are assumed to be chlorinated and converted to N-halamine. After the simple immersion of PDA-based coatings in a dilute bleach solution, the formation of N-halamine is confirmed by iodometric titration. Compared with the original PDA-based coating, N-halamine-functionalized PDA-based coatings exhibit high antibacterial activity toward Gram-positive S. aureus and Gram-negative E. coli within a brief contact time. Notably, the PDA samples retain their oxidative chlorine content after extended storage, and ~90% of the chlorine is restorable after repeated quenching. The coatings are applicable to a wide spectrum of substrates and are stable. This study may provide a simple, effective method for the preparation of functional fibers with antibacterial activities for the clothing and textile industries.

中文翻译：

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聚多巴胺涂层上稳定的 N-卤胺，具有高抗菌效率

摘要 在本文中，我们报告了一种通过在聚多巴胺 (PDA) 基涂层上引入 N-卤胺结构来制备高效抗菌涂层的简单方法。基于 PDA 的涂层仅包括 PDA 和与聚乙烯亚胺 (PEI) 共沉积的 PDA。假设 PDA 和 PEI 中的胺基被氯化并转化为 N-卤胺。将基于 PDA 的涂层简单地浸入稀释的漂白剂溶液中后，通过碘滴定法确认了 N-卤胺的形成。与原始的基于 PDA 的涂层相比，N-卤胺功能化的基于 PDA 的涂层在短时间内对革兰氏阳性金黄色葡萄球菌和革兰氏阴性大肠杆菌表现出较高的抗菌活性。值得注意的是，PDA 样品在长期储存后仍保留其氧化氯含量，并且~90% 的氯在反复淬火后可恢复。该涂层适用于广泛的基材并且稳定。该研究可为服装和纺织行业制备具有抗菌活性的功能性纤维提供一种简单、有效的方法。