Synthesis of Water Soluble Block Copolymer with Temperature and Chemical dual-stimuli Responsive and its Application in Renewable Heavy Metal ion Adsorbent

By : Fenglian Wang, Maoan Wang, Dan Song, Yin Xu, Dinghai Huang

Page No: 615-630

Abstract
Reversible addition-fragmentation chain transfer (RAFT) polymerization was employed to synthesize a well defined block copolymer, Poly(2,4-dinitrobenzaldehyde acryloylhydrazone)-b[1]N-isopropylacrylamide (PDAH-b-PNIPAM) comprising both thermosensitive block and chemical sensitive block, with specific molecular weight and narrow molecular weight distribution. The thermal sensitive LCST temperature is slightly decrease with the increase of mole ratio of PDAH copolymer block. A detailed examination of the effect of contact time and the concentration of heavy metal ion Cd(II) on the adsorption characteristics was performed. The adsorbent with 10.1% mole ratio of PDAH copolymer block exhibits maximum adsorption capacity. The recovery and recycle investigation indicated that the dual-stimuli sensitive block copolymeric adsorbent showed very good renewability.

Authors :
Fenglian Wang, Maoan Wang, Dan Song, Yin Xu and Dinghai Huang : Department of Polymeric Material Science and Engineering, School of Material Science and Engineering, Tianjin University 300072, Tianjin, China