摘要
以过硫酸钾和尿素构成氧化还原体系,引发双水相体系中的淀粉接枝丙烯酰胺聚合反应。对接枝聚合反应的引发剂配比、分散体系的构成、反应温度、反应时间等因素进行了研究。确定最佳工艺条件为:聚乙二醇为分散剂,质量分数为6%;n(K2S2O8)∶n(AM)=1.1∶1×104;n(K2S2O8)∶n[CO(NH2)2]=1∶2.5;引发时间为15 min;聚合时间为6 h;聚合温度为50℃。在此条件下,双水相体系具有较好的稳定性,且后处理易于分相;单体转化率97.4%,接枝率121.4%,特性黏数435 mL/g。将制备的淀粉基絮凝剂用于瓷泥污水处理,效果较好。
Redox system consisting of potassium peroxodisulfate and urea was used to initiate grafting copolymerization of acrylamide onto starch in aqueous two-phase system.The effect of initiators ratio,composition of dispersed medium,reaction temperature,and reaction time on the grafting copolymerization was studied.The results indicate that the optimized conditions are as follows： PEG was used as dispersing agent and its mass concentration is 6%,n（K2S2O8）∶n（AM） is 1.1∶1×104,n（K2S2O8）∶n[CO（NH2）2] is 1∶2.5,initiation time is 15 min,polymerization time is 6 h,and reaction temperature is 50 ℃.Under these conditions the aqueous two-phase system shows the better stability and its phase separation in post treatment is easier,meanwhile,monomer conversion is 97.4%,grafting yield is 121.4%,and the inherent viscosity is 435 mL/g.The resulted starch-based flocculant shows good effect in treatment of porcelain clay waste water.
出处
《大连工业大学学报》
CAS
北大核心
2011年第3期203-205,共3页
Journal of Dalian Polytechnic University
基金
大连市科技计划资助项目(2007A10GX121)
关键词
淀粉
丙烯酰胺
接枝共聚
双水相
starch
acrylamide
grafting copolymerization
aqueous two-phase system
