三元阳离子接枝淀粉的合成及其絮凝性能  

Synthesis and Properties of Ternary Cationic Grafted Starch Flocculant

作　　者：李海花[1,2] 高玉华 郑玉轩[3] 李娜 张利辉 刘振法 LI Haihua;GAO Yuhua;ZHENG Yuxuan;LI Na;ZHANG Lihui;LIU Zhenfa(Institute of Energy Resources,Hebei Academy of Sciences,Shijiazhuang 050081,China;Hebei Engineering Research Center for Water Saving in Industry,Shijiazhuang 050081,China;School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China;Hebei Sunwater Water Treatment Co.,Ltd,Shijiazhuang 050081,China)

机构地区：[1]河北省科学院能源研究所,河北石家庄050081 [2]河北省工业节水工程技术研究中心,河北石家庄050081 [3]河北工业大学化学学院,天津300130 [4]河北桑沃特水处理有限责任公司,河北石家庄050081

出　　处：《水处理技术》2022年第3期46-51,共6页Technology of Water Treatment

基　　金：国家自然科学基金项目(21376062);河北省自然科学基金和重点基础研究专项(18964005D);河北省科学院科技计划项目(20701,2019Q02,22706)。

摘　　要：以玉米淀粉(St)为原料,2-甲基丙烯酰氧乙基三甲基氯化铵(DMC)和丙烯酰胺(AM)为接枝单体,硝酸铈铵(CAN)为引发剂,合成三元阳离子接枝淀粉St-g-PDMC-co-PAM。当m(St):m(AM):m(DMC)=1:0.2:0.8,m(St):m(CAN)=1:0.3,反应温度60℃,反应时间4 h时,产物的氮含量为4.38%,Zeta电位为34.42 mV。考察了投加量、水样pH、高岭土初始浓度、絮凝温度和静置时间对絮凝效果的影响,实验结果表明,当投加量为8 mg/L,水样pH=7,絮凝温度25℃,静置时间1 h时,质量分数为2%的高岭土悬浊液经过絮凝后,上清液的透光率可达91.41%。通过对上清液zeta电位和透光率的关系研究,发现St-g-PDMC-co-PAM的絮凝机理主要为电中和作用。A kind of ternary cationic grafted starch St-g-PDMC-co-PAM was synthesized with corn starch(St) as raw material,2-methylacryloxyethyl trimethylammonium chloride(DMC) and acrylamide(AM) as grafting monomers and ammonium ceric nitrate(CAN) as initiator.When m(St):m(AM):m(DMC)=1:0.2:0.8,m(St):m(CAN)=1:0.3,reaction temperature 60 oC and reaction time 4h,the nitrogen content and Zeta potential of the product synthesized under these conditions was 4.38% and 34.42 mV,respectively.The effects of pH value,initial concentration,flocculation temperature and settling time on the flocculation efficiency to kaolin suspension were investigated.The results showed that when pH=7,flocculation temperature 25 oC and settling time 1h,the light transmittance of the supernatant of 2%(mass fraction) kaolin suspension after flocculating with 8 mg/L St-g-PDMC-co-PAM could reach 91.41%.Through the study of zeta potential and transmittance of the supernatant,it is found that the flocculation mechanism of St-g-PDMC-co-PAM was mainly charge neutralization effect.

关 键 词：玉米淀粉 2-甲基丙烯酰氧乙基三甲基氯化铵 丙烯酰胺 接枝共聚 絮凝 

分 类 号：O636.12[理学—高分子化学]