聚丙烯进行抗菌改性对其在公共卫生、医疗防护和食品包装等领域的应用具有重要意义，熔融接枝N-卤胺抗菌剂是改性的主要方法之一。目前为止，材料表面活性氯含量低、抗菌功能单一是该方法的主要问题。针对于此，本项目拟设计合成可聚合N-卤胺前体和功能性共聚单体，分析共聚单体对熔融接枝反应过程和接枝分子结构的影响；结合X射线光电子能谱、和频振动光谱和原子力显微镜等表面测试手段，研究在外界诱导下N-卤胺前体的“自发”和在共聚单体拖拽下的“强制”表面偏析行为，及其对表面组成和结构的影响；以大肠杆菌和金黄色葡萄球菌为对象，改性材料氯化处理后通过抗菌实验，探究表面组成和结构对抗细菌粘附、杀菌和菌体残骸释放能力的影响，寻求表面组成和结构的最佳组合，实现聚丙烯多功能高效抗菌表面的构筑。

Imparting antimicrobial activity to polypropylene is of crucial importance to its application in various areas, such as public health, medical protection and food packaging. Through melt grafting of N-halamines, the antimicrobial functionalization can be realized. Up to now, the low active chlorine content and the single-function of antimicrobial activity limited its development. In this project, polymerizable N-halamines and multi- functional comonomers will be designed and synthesized. The influence of comonomers on the melt grafting reaction and the structure of grafted molecules will be investigated. The combination of X-ray photoelectron spectroscopy, Sum frequency generation vibrational spectroscopy and atomic force microscopy will be used to characterize the surface composition and structure after the “free surface segregation” and “forced surface segregation” dragged by the comonomers under different environments. After chlorination of the materials, the antimicrobial performance against both Escherichia coli and Staphylococcus aureus will be evaluated. The effects of the surface composition and structure on microbial attachment, sterilization and debris releasing will be studied. Based on these investigations, the optimal composition and structure of surface will be found to construct the antimicrobial surface of polypropylene with multi-function and high-efficiency.