Self-assembly of PNIPAM/PAA IPN microgels in ice-crystal template to produce fibers
The microgels of interpenetrating polymer network (IPN) structure based on poly(N-isopropylacrylamide) (PNIPAM) network and poly(acrylic acid) (PAA) network (PNIPAM/PAA IPN microgels) were firstly synthesized by seed-emulsion polymerization, using redox initiator and the less crosslinked PNIPAM microgels as seeds. The results obtained by dynamic laser light scattering show that the microgels have good pH/temperature dual sensitivity. The temperature sensitive components and pH sensitive components have little interferrence with each other. Then the PNIPAM/PAA fibers were prepared by self-assembly of the PNIPAM/PAA IPN microgels in the ice-crystal templates formed by unidirectional liquid nitrogen freezing method. Field emission scanning electron microscopy images obtained under low accelerate voltage indicat that the fibers are composed of hexagonally packed PNIPAM/PAA IPN microgels. The PNIPAM/PAA fibers have fascinating application outlook in many fields, such as intelligent drug release, sensor, biomass separation, etc.
LIU Xiaoyun YANG Jun ZHANG Li YANG Jianmao ZHA Liusheng
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua Universi State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua Universi Research Center for Analysis and Measurement, Donghua University, Shanghai 201620, P.R.China
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
754-757
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）