从三嵌段共聚物制备纳米空心纤维的研究

近年来 ,利用分子自组装技术制备纳米材料已引起人们越来越多的兴趣1] ,而从三嵌段共聚物在选择性溶剂中形成可分散的纳米颗粒并通过化学改性的方法使其具有某种功能或用作功能化的载体更具有实际意义 2 ] .本文从由阴离子聚合得到的窄分布三嵌段共聚物出发 ,成功地制备了纳米空心纤维 ,将有可能用于制备纳米导线及模板聚合等方面 .1　实验部分1 .1　样品制备　采用阴离子聚合方法制备三嵌段共聚物 ,用凝胶色谱测定分子量分布宽度 ,光散射测定重均分子量 ,NMR测定其化学组成比 .将共聚物的甲苯浓溶液 (质量分数 30 % )倒入培养皿中并密…

The Preparation of Hollow Nano-fiber from Tri-block Copolymer

The solid state morphology of the tri-block copolymer PS-b-PCEMA-b-PtBA, which was synthesized by anionic polymerization with narrow molecular weight distribution, was in lamella structure from TEM micrographs. After being blended with polystyrene with the mass ratio of 1:04, the morphology showed cylinder structure. With PSas continous phase, PCEMA and PtBA phases formed cylinders with PCEMA as outer layer. The nanofibres can be got and dispersed in good solvents of PS when the PCEMA phase was crosslinked. The t-butyl group in PtBA phase can be cleavaged by reacting with TM-SI, and nanofibres changed to nanotubes finally. It has the great potential applications, such as in the preparation of nanowires, template polymerization, nano reactor etc ..