聚乙烯吡咯烷酮半互穿网络智能凝胶的合成和电场行为研究  

Study on synthesis of PVP semi-IPNs intelligent hydrogels and behaviors in electric field

作　　者：陈尔凡[1] 张英杰[1] T Vladlkova 

机构地区：[1]沈阳化工学院高分子材料研究所,辽宁沈阳110142 [2]索菲亚化工冶金技术大学

出　　处：《现代化工》2006年第6期37-39,41,共4页Modern Chemical Industry

基　　金：科技部国际合作项目(10-19B);辽宁省教育厅科学基金(202213109)资助项目

摘　　要：利用化学交联法,制备了由聚乙烯吡咯烷酮(PVP)和丙烯酰胺(Am)、丙烯酸(AA)复合的具有半互穿网络(Semi-IPNs)结构的高分子水凝胶。研究了凝胶在直流电场作用下NaCl溶液中的溶胀、弯曲行为及交联剂含量、PVP含量对水凝胶的溶胀性质、拉伸强度的影响。结果表明凝胶的最大弯曲率随着时间和电场强度的增加而增大,随溶液离子浓度的增加呈现出最大值。增加PVP可以提高拉伸强度降低弯曲度,适当增加交联剂,可以加强拉伸强度108.51%,降低溶胀度68.29%。The semi-interpenetrating polymer networks of PVP/P （AA-Am） hydrogels were synthesized by radical polymerization, in which P（AA-Am） hydrogels networks were formed inside of cross-linked PVP chains. The bending and swelling behaviors of hydrogels were investigated in the DC electric field. The effects of amount of cross-linker, amount of PVP in PVP/P（AA-Am） hydrogels on swelling ratio were studied. The results showed that the maximum bending degree of hydrogels increased with the increasing of electric field density and the time. With the increasing of ionic strength in NaC1 aqueous solution, the max appeared, increasing the PVP content in hydrogels can improve tensile strength and decrease bending degree with adding the cross-linker,tensile strength increased by 108.51% ,the swelling ratio decreased by 68.29% .

关 键 词：PVP水凝胶 半互穿网络 电场敏感性 溶胀率 

分 类 号：TQ311[化学工程—高聚物工业]