【作者】 刘长风； 刘学之； 刘学贵； 刘德辉；

【Author】 LIU Chang-feng~(1,2) LILT Xue-zhi~2 LIU Xue-gui~(1,2) LIU De-hui~2 (1.Northeastern University,Shenyang 110004,China; 2.Shenyang Institute of Chemical Technology,Shenyang 110142,China)

【机构】 东北大学； 沈阳化工学院；

【摘要】 首先合成低分子量的聚丙烯酰胺,再用甲醛使其羟甲基化,最后羟甲基化聚丙烯酰胺和丙烯酰胺缩合得到可室温交联的聚丙烯酰胺．研究了反应物摩尔比、反应温度、反应时间和溶液 pH 值等因素对羟甲基化和缩合反应的影响,确定了最佳反应条件．这种改性聚丙烯酰胺的水溶液和交联剂于室温可快速交联得到凝胶体．该工艺的优点是对微生物细胞无毒性,聚合(包埋) 温度低,交联发生在侧链使抗水解性增强．更多还原

【Abstract】 In this paper first a polyacrylamide with low molecular weight was synthesized,then the polyacrylamide was hydroxymethylated with formaldehyde,finally the hydroxymethylatcd polyacrylamide and acrylamidc reacted to form the cross-linking at room temperature polyacrylamide.The effects of the mol-ratio of reactants,reaction temperature,reaction time and pH on hydroxymethylation and condensation reaction were researched;the best synthesis process was given. This modified polyacrylamide and cross-linking agent arc able to form gelatin at room temperature.The merits of this process are there is no toxic to microbial cells,the temperature of polymerization (entrapment)is lower,the cross-linking is at side chain and the anti-hydrolyzation ability is strong.更多还原