温度及pH敏感性N-乙烯基吡咯烷酮与丙烯酸β-羟基丙酯共聚物/聚(丙烯酸)互穿网络水凝胶的合成及其性能研究

THE SYNTHESIS AND CHARACTERIZATION OF THERMO- AND pH-SENSITIVE POLY( N -VINNYLPYRROLIDONE-co-β-HYDROPROPYL ACRYLATE)/POLY(ACRYLIC ACID) IPN HYDROGEL

由N 乙烯基吡咯烷酮与丙烯酸 β 羟基丙酯共聚物 /聚 (丙烯酸 )所得的互穿网络水凝胶P(NVP co β HPA) /PAA具有温度及pH双重敏感特性 .在酸性条件下 ,由于P(NVP)与PAA间络合作用 ,随温度升高迅速退胀 ;在碱性条件下 ,凝胶的溶胀率远大于酸性条件下的溶胀率 。

A new IPN hydrogel poly( N vinyl pyrrolidone co β hydropropyl acrylate)/ poly(acrylic acid) was synthesized,and its temperature and pH sensitive behavior was studied.In acidic medium the swelling ratio (SR) of this hydrogel slumps suddenly and drops quickly with temperature rising due to the hydrogen bond formation between PNVP and PAA.In alkaline medium,the SR of the IPN hydrogel rises as the temperature is raised.