PREPARATION OF THERMO-SENSITIVE HYDROGELS FROM ACRYLATED LIGNIN AND N-ISOPROPYLACRYLAMIDE THROUGH PHOTOCROSSLINKING

摘要：

A novel thermo-sensitive hydrogel was obtained from acrylated lignin (LM) and N-isopropylacrylamide (NIPAAm) through UV photocrosslinking. The influences of the LM content on the hydrogel properties were investigated in terms of their lower critical solution temperature (LCST), interior morphology, temperature response kinetic, swelling and deswelling kinetics. The swelling ratio of the hydrogels at different temperature showed that these new smart hydrogels were responsive to the changes of external temperature. The DSC data demonstrated that the LCST of the hydrogels reduced with the increased content of LM in the hydrogels. The SEM images showed that increasing LM content resulted in the reduced pore size of the hydrogel. The swelling and deswelling behavior stated that the hydrogel with less LM content exhibited better temperature sensitivity.

关键词： Thermo-sensitive hydrogel acetic acid lignin acryloyl chloride N-isopropylacrylamide

作者: Qinghua Feng Fangeng Chen Xuesong Zhou

作者单位: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China

会议类型: 国际会议

会议名称: 16th International Symposium on Wood,Fiber and Pulping Chemistry(第十六届木材、纤维及制浆化学国际会议)

会议地点: 天津

会议语种:英文

页码: 247-252

在线出版日期: 2011-06-08（万方平台首次上网日期，不代表论文的发表时间）