Kolya Haradhan, Tripathy Tridib
Postgraduate Division of Chemistry, Midnapore College, Midnapore, Paschim Medinipur 721101, West Bengal, India.
Postgraduate Division of Chemistry, Midnapore College, Midnapore, Paschim Medinipur 721101, West Bengal, India.
Int J Biol Macromol. 2014 Sep;70:26-36. doi: 10.1016/j.ijbiomac.2014.06.028. Epub 2014 Jun 24.
Synthesis of amylopectin grafted polyacrylamide (AP-g-PAM) and poly(N,N-dimethylacrylamide) (AP-g-PDMA) was carried out by Ce4+ in water medium. The reaction conditions for maximum grafting was optimized by varying the reaction variables, including the concentration of monomers, ceric ammonium nitrate (CAN), amylopectin, reaction time and temperature. The graft copolymers were characterized by FTIR spectroscopy, NMR (both 1H and 13C) spectroscopy, molecular weight determination and molecular weight distribution by using size exclusion chromatography (SEC), thermal analysis (TGA), SEM studies. Biodegradation of the graft copolymers was carried out by enzyme hydrolysis. Flocculation performances of the graft copolymers were evaluated in 1.0 wt% coal and 1.0 wt% silica suspensions. A comparative study of the flocculation performances of AP-g-PDMA and AP-g-PAM was also made. It shows that the flocculation performance of AP-g-PDMA was better than that of AP-g-PAM. AP-g-PDMA performed best when compared with other commercial flocculants in the same suspensions.
在水介质中通过Ce4+进行支链淀粉接枝聚丙烯酰胺（AP-g-PAM）和聚（N，N-二甲基丙烯酰胺）（AP-g-PDMA）的合成。通过改变反应变量，包括单体浓度、硝酸铈铵（CAN）、支链淀粉、反应时间和温度，优化了最大接枝的反应条件。通过傅里叶变换红外光谱（FTIR）、核磁共振（1H和13C）光谱、使用尺寸排阻色谱（SEC）测定分子量和分子量分布、热分析（TGA）、扫描电子显微镜（SEM）研究对接枝共聚物进行了表征。通过酶水解对接枝共聚物进行生物降解。在1.0 wt%的煤和1.0 wt%的二氧化硅悬浮液中评估接枝共聚物的絮凝性能。还对AP-g-PDMA和AP-g-PAM的絮凝性能进行了比较研究。结果表明，AP-g-PDMA的絮凝性能优于AP-g-PAM。在相同悬浮液中，与其他商业絮凝剂相比，AP-g-PDMA表现最佳。
