高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (3): 811.doi: 10.7503/cjcu20200567

• 物理化学 • 上一篇    下一篇

多巴胺基多重相互作用协同构筑抗污-杀菌双重功能涂层

王昱芃, 赵洋, 李茉涵, 史素青(), 宫永宽   

  1. 西北大学化学与材料科学学院, 合成与天然功能分子教育部重点实验室, 西安 710102
  • 收稿日期:2020-08-16 出版日期:2021-03-10 发布日期:2021-03-08
  • 通讯作者: 史素青 E-mail:shisq@nwu.edu.cn
  • 基金资助:
    国家自然科学基金(21774100);陕西省自然科学基础研究计划项目(2017JM2011)

Fabrication of Antifouling-antibacterial Dual Functional Polymer Coating via Dopamine-based Multiple Interactions

WANG Yupeng, ZHAO Yang, LI Mohan, SHI Suqing(), GONG Yongkuan   

  1. Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education,College of Chemistry & Material Science,Northwest University,Xi’an 710102,China
  • Received:2020-08-16 Online:2021-03-10 Published:2021-03-08
  • Contact: SHI Suqing E-mail:shisq@nwu.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(21774100);the Natural Science Basic Research Plan in Shaanxi Province of China(2017JM2011)

摘要:

在弱碱性和空气条件下, 以多巴胺(DA)为多重相互作用模型分子, 调控羧甲基壳聚糖(CMC)和侧基含 伯氨基(—NH2)的磷酰胆碱基聚合物(PMA)与DA之间的相互作用, 采用一步共沉积法构筑表面富含磷酰胆碱两性离子基团和CMC杀菌性聚合物的双重抗菌涂层. 研究发现, DA分子的万能黏附特性有利于诱导CMC 和PMA在基材表面发生共沉积, 增强涂层中各组分及其与基材之间的界面结合力, 所得涂层在体积分数为75%的乙醇水溶液中超声2 h后, 表面水接触角数值几乎保持不变, 稳定性良好; 而CMC和PMA聚合物链中的—NH2侧基与DA及其衍生物之间发生氢键、 席夫碱和/或迈克尔加成反应等多重相互作用, 协同改善DA分子氧化-自聚行为和沉积过程, 获得形貌较为均一的涂层表面. 所得表面同时含有两性离子基团和CMC聚合物链, 兼具良好抗生物污染和杀菌活性, 能够有效抑制细菌生物膜的形成.

关键词: 多巴胺, 共沉积, 多重相互作用, 抗污-杀菌, 仿生涂层

Abstract:

Biomedical device relating bacterial colonization has become a severe issue in clinical practice. To prevent the formation of bacterial biofilm, we develop a facile and versatile one-step codeposition method to readily fabricate an antifouling-antibacterial dual functional polymer coating by virtue of multiple interactions between dopamine derivatives and primary amines in zwitterionic polymer(PMA) and carboxymethyl chitosan(CMC). The presence of DA drives the codeposition of polydopamine(PDA), CMC and PMA, endowing the coating with good durability. While the multiple interactions among CMA, PMA and DA, i.e. hydrogen bonding, Michael addition and/or Schiff base reacions, are beneficial to regulate the oxidation and self- aggregation of DA, eventually achieving a uniformly codeposited polymer coating. Due to the coexistance of zwitterionic antifouling moieties and bactericidal CMC, the resultant CMC-PMA-PDA coating both has the capacity of resisting bacterial adhesion and killing the bacteria adhered on its surface, effectively inhibiting the bacteria biofilm formation.

Key words: Dopamine, Codeposition, Multiple interaction, Antifouling-antibacteria, Biomimetic coating

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