聚异丙基丙烯酰胺(PNIPAM)凝胶体积相变中的氢键作用  

The Role of Hydrogen Bonding in the Volume Phase Transitions of Poly(N-isopropylacrylamide)gels

作　　者：赵新军[1] 

机构地区：[1]伊犁师范学院新疆凝聚态相变与微结构实验室,新疆伊宁835000

出　　处：《伊犁师范学院学报（自然科学版）》2014年第3期30-34,共5页Journal of Yili Normal University：Natural Science Edition

基　　金：伊犁师范学院一般项目(2013YSYB17)

摘　　要：把关联模型(association models)推广应用到聚异丙基丙烯酰胺(PNIPAM)高分子凝胶体系,研究PNIPAM-水的氢键和水-水的氢键在高分子凝胶体积相变中的作用.首先通过分析凝胶体积分数与温度的关系发现,由于两种氢键作用,随着温度变化PNIPAM凝胶出现体积相变,表明在体积相变过程中两种氢键都起着重要作用.其次,对旋节线的研究发现,PNIPAM凝胶体积相变中出现的下临界共溶温度(LCST)现象也是由于PNIPAM-水氢键和水-水氢键共同作用的结果.We presented a theory to study the volume phase a transition in Poly（N-isopropylacrylamide）（PNIPAM） gels. Our theory model includes the consideration of PNIPAM-water and water-water hydrogen bonds. On basis of our theory approach, we investigated the PNIPAM gels volume fraction as a function of temperature. It is clearly indicate, because of two types of hydrogen bonds, PNIPAM gels present volume phase transitions. The calculated spinodal curves reveal, also because of both PNIPAM-water and water-water hydrogen bonds, the presence of lower critical solution temperature（LCST）.

关 键 词：PNIPAM凝胶 体积相变 氢键 

分 类 号：O484[理学—固体物理]