CSt-g-DMC的快速制备与结构表征及其絮凝性能分析  

Rapid preparation and structure characterization of CSt-g-DMC and analysis on its flocculation performance

作　　者：爨珊珊 石海信[1,2] 王爱荣 王梓民 何强 王锋 CUAN Shan-shan;SHI Hai-xin;WANG Ai-rong;WANG Zi-min;HE Qiang;WANG Feng(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;College of Petroleum and Chemical Engineering,Beibu Gulf University,Qinzhou 535011,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]北部湾大学石油与化工学院,广西钦州535011

出　　处：《现代化工》2020年第6期155-159,164,共6页Modern Chemical Industry

基　　金：广西高校高水平创新团队及卓越学者计划项目(桂教人[2016]42号);广西科技基地和人才专项项目(桂科AD17195069)。

摘　　要：以玉米淀粉(CSt)为原料,甲基丙烯酰氧乙基三甲基氯化铵(DMC)为阳离子单体,采用过硫酸铵-热双引发体系快速制备淀粉接枝共聚物CSt-g-DMC。通过单因素实验优化得到较佳制备工艺:DMC质量分数为12%、温度为110℃、反应时间为30 min。利用FT-IR、XRD、SEM和TGA-FTIR对产物结构进行表征。结果表明,CSt已成功接枝DMC,产物是无定形态的多孔物;在氮气保护的受热过程中,产物所接入的DMC基团能稳定至214℃;对于质量浓度为500 mg/L的高岭土悬浮液,当CSt-g-DMC质量浓度为4.0 mg/L时絮凝效果最好。Starch graft copolymer(CSt-g-DMC)is prepared by using corn starch(CSt)as raw material,and methacryloxyethyl trimethyl ammonium chloride(DMC)as cationic monomer.Polymerization is initiated by using ammonium persulfate-heat as a double initiator system.Through single factor experiment,the optimum preparation process is obtained as follows:the mass fraction of DMC is 12%,temperature maintains at 110℃,and reaction lasts for 30 min.The structure of the product is characterized by FT-IR,XRD,SEM and TGA-FTIR.It is shown that DMC has successfully grafted onto CSt,and the product is an amorphous porous material.During the heating process protected in nitrogen atmosphere,DMC group of the product remains thermal stable under 214℃.For kaolin suspension with a mass volume concentration of 500 mg·L^-1,the flocculation effect will be the best when the dosage of CSt-g-DMC is 4.0 mg·L^-1.

关 键 词：玉米淀粉 甲基丙烯酰氧乙基三甲基氯化铵 接枝共聚 结构表征 阳离子絮凝剂 

分 类 号：TQ085[化学工程]