木薯淀粉接枝丙烯酰胺絮凝剂制备的影响因素分析  

Analysis off actors affecting the preparation process of tapioca grafted acrylamide flocculant

作　　者：郭雅妮[1] 穆林聪 刘梦雅 GUO Yani;MU Lincong;LIU Mengya(School of Enviornment and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710048,china)

机构地区：[1]西安工程大学环境与化学工程学院

出　　处：《功能材料》2020年第2期2150-2154,2181,共6页Journal of Functional Materials

基　　金：陕西省重点研发计划资助项目(2017GY-121);陕西省重点研发计划资助项目(2019SF-242);西安市科技局创新引导项目资助项目(201805030YD8CG14(13))

摘　　要：以木薯淀粉与丙烯酰胺单体为原材料,采用水溶液聚合法制备淀粉接枝丙烯酰胺絮凝剂(St-PAM),以单体转化率与接枝率为指标,探究制备工艺条件对淀粉絮凝剂的影响,确定最佳合成条件为:反应温度55℃,淀粉与丙烯酰胺单体比1∶3,KPS浓度为6 mmol/L,反应时间为5 h。采用红外光谱、扫描电镜、热重分析进行结构表征与分析,并进行高岭土悬浮液絮凝测试,考察不同因素对St-PAM絮凝率的影响。在絮凝剂投加量为250 mg/L、温度为30℃、pH为7、该条件下St-PAM絮凝率可达86.6%。The starch grafted acrylamide flocculant(St-PAM)was prepared by aqueous solution polymerization using tapioca starch and acrylamide monomer as raw materials.The monomer conversion rate and graft ratio were used to explore the preparation conditions for starch flocculant.The optimum synthesis conditions were determined as follows:reaction temperature 55℃,ratio of starch to acrylamide monomer 1∶3,KPS concentration 6 mmol/L,reaction time 5 h.Infrared spectroscopy,scanning electron microscopy and thermogravimetric analysis were used to characterize and analyze the structure,and the kaolin suspension flocculation test was carried out to investigate the influence of different factors on the flocculation rate of St-PAM.The flocculating agent dosage is 250 mg/L,the temperature is 30℃,and the pH is 7.Under this condition,the flocculation rate of St-PAM can reach 86.6%.

关 键 词：淀粉 丙烯酰胺 水溶液聚合 絮凝率 

分 类 号：TB352[一般工业技术—材料科学与工程]