过硫酸铵引发阳离子淀粉接枝共聚物合成与表征  

Preparation by Ammonium Persulfate Initiation and Characterization of Cationic Starch Graft Copolymer

作　　者：吴修利[1] 薛冬桦[2] 王丕新[3] 

机构地区：[1]长春大学生物科学技术学院,吉林长春130012 [2]长春工业大学化学与生命科学学院,吉林长春130012 [3]中国科学院长春应用化学研究所,生态环境高分子材料重点实验室,吉林长春130022

出　　处：《食品科学》2011年第7期73-76,共4页Food Science

基　　金：国家自然科学基金项目(50673089)

摘　　要：采用水溶液聚合方法,以过硫酸铵(APS)为引发剂,将玉米淀粉(St)与丙烯酰氧乙基三甲基氯化铵(DAC)单体接枝聚合,制备阳离子淀粉高分子聚合物。讨论单体质量比、引发剂用量、反应温度和反应时间等因素对聚合物阳离子度的影响。结果表明:当加入淀粉质量1.0%的过硫酸铵,DAC与淀粉质量比2.5:1,50℃反应8h时,接枝共聚物的阳离子度最高可达53.68%。用红外光谱、扫描电镜、热失重分析对接枝共聚物结构进行表征,表征结果均证实阳离子淀粉高分子聚合物制备成功。A cationic polymer was synthesized by aqueous solution polymerization using corn starch and acyrloxyethyl trimethylammonium chloride（DAC） as the starting materials and ammonium persulfate as the initiator.The effects of the mass ratio between DAC and corn starch,initiator amount,temperature and reaction time on cationic degree（DC） were discussed.The results showed that the maximum DC reached 53.68% after 8 hours of the reaction at 50 ℃ between DAC and starch with a weight ratio of 2.5：1 initiated by ammonium persulfate added at a level of 1.0%（calculated on the basis of the weight of corn starch）.Furthermore,the graft copolymer was structurally characterized by FTIR,scanning electron microscope（SEM） and thermo-gravimetric/differential thermal analyze（TG-DTA）.

关 键 词：过硫酸铵 玉米淀粉 丙烯酰氧乙基三甲基氯化铵 阳离子聚合物 结构表征 

分 类 号：TS234[轻工技术与工程—粮食、油脂及植物蛋白工程]