【作者】 郭朝霞； 程慧慧； 刘焕焕； 熊曦； 张绪成； 于建；

【Author】 GUO Zhaoxia;CHENG Huihui;LIU Huanhuan;XIONG Xi;ZHANG Xucheng;YU Jian;Key Laboratory of Advanced Materials(MOE),Department of Chemical Engineering,Tsinghua University;

【机构】 清华大学化工系先进材料教育部重点实验室；

【摘要】 <正>聚合物电纺纤维膜因具有纳米结构、比表面积大、孔隙率高等特点在过滤、催化、传感器、药物释放和组织工程支架等领域有乐观的应用前景。但是,很多常用聚合物不含可反应官能团,难以进行进一步改性,使其功能拓展受限。本研究对力学性能优异的热塑性聚氨酯(TPU)电纺纤维膜进行氨基官能化改性,并探讨官能化电纺纤维在导电、催化等领域的应用。首先,采用和氨基丙基三乙氧基硅烷更多还原

【Abstract】 Electrospun TPU fiber mats have good mechanical properties,suitable for practical applications.However,they only possess limited functionalities,restricting their application fields.Introducing reactive groups such as amine groups onto TPU electrospun fibers can facilitate subsequent surface modification,and thus widens their application fields.In this work,two ways of functionalization are carried out to introduce amine groups onto the surface of TPU fibers,one is co-electrospinning with aminopropyltriethoxysilane(KH550),the other is dip-coating chitosan.Then,gold nanoparticles are adsorbed onto the fibers because of the good affinity of gold to amine groups.A conductive gold layer is formed on the surface of TPU fiber mat after electroless plating using the adsorbed gold nanoparticles as the seeds;the gold nanoparticles adsorbed on TPU fiber surfaces shows good catalytic activity and reusability for the reduction of 4-nitrophenol by sodium borohydride.These two types of applications demonstrate the usefulness of the amine groups in the preparation of TPU fibers with added functionalities.更多还原