离子液体熔融接枝聚丙烯及其作为抗菌熔喷布的应用研究

具有永久抗菌性和带持久稳定电荷的聚丙烯（PP）熔喷布是当前医疗防护领域的重大需求，但目前尚缺乏适于工业化制备的有效策略。本项目拟利用离子液体独特的阴阳离子结构及其广谱且“接触-杀死”的抗菌特性，通过反应性熔融加工的方式将阳离子含双键的离子液体接枝到PP分子链上，同时实现PP的降解、功能单体的接枝和电荷的固定，制备具有高熔指、永久抗菌、抗静电及带持久稳定电荷的PP熔喷专用料，并探索其在抗菌熔喷布中的应用。项目将系统研究引发剂种类、离子液体结构、共混体系组成、加工条件等对反应性加工过程中PP降解和离子液体接枝的影响，揭示离子液体自由基接枝PP的机理，发展高熔指、高接枝率PP制备的关键技术，阐明离子液体接枝PP的结构与性能关系，为抗菌PP熔喷布的产业化制备提供科学依据和技术支撑。这一研究为制备兼具高熔指和功能性PP熔喷料提供了全新的思路，具有重要的学术价值和工业应用意义。

Polypropylene (PP) melt blown fabric with permanent antibacterial and durable charge is in great need in health protection field. However, there’s great challenge to prepare in industrial scale. Herein, PP melt blown material with high melt flow rate (MFR) and permanent antibacterial, antistatic property and durable charge is prepared by grafting ionic liquid, which has double bond on the cations, on PP molecular chains via reactive melt processing method. The degradation of PP, the grafting of functional monomer as well as the immobilization of charge are achieved simultaneously during blending. The application of the prepared PP melt blown material in antibacterial melt blown fabric is also explored. The species of initiator, the structure of ionic liquid, the composition of the blends and the processing conditions are systematically investigated to illustrate the influence on the degradation and grafting of PP during blending. The mechanism of ionic liquid melt free-radical grafting PP is revealed. Also, this project will develop the key technique of preparing PP with high MFR and high grafting degree. Besides, the structure-property relationship will be elucidated. These will pave the possibility to fabricate the antibacterial PP melt blown fabric industrially. This projects provides a new idea to prepare PP melt blown material with high MFR and functionalities. It is of great significance in both academic and industrial fields.