Department of Chemistry, Centre of Advanced Studies, Banaras Hindu University, Varanasi 221005, India.
Department of Chemistry, Centre of Advanced Studies, Banaras Hindu University, Varanasi 221005, India.
Carbohydr Polym. 2015 Aug 20;127:275-81. doi: 10.1016/j.carbpol.2015.03.044. Epub 2015 Mar 28.
The synthesis of novel cationic flocculants based on amylopectin (AP), acrylamide (AM) and (3-acrylamidopropyl) trimethylammonium chloride (ATMAC) were done by free radical polymerization using ammonium persulphate (APS) as an initiator. Three different grades of novel cationic flocculants (AP-g-C 1 to AP-g-C 3) were synthesized by varying the proportion of acrylamide and (3-acrylamidopropyl) trimethylammonium chloride monomers. Through the hydrolysis of these flocculants, in presence of NaOH, three different grades of amphoteric polymers (AP-AT-C 1 to AP-AT-C 3) were synthesized. The synthesized polymers were characterized by various methods, namely, infrared spectroscopy, NMR spectroscopy, thermal analysis, viscosity measurement, scanning electron microscopy and X-ray diffractometry. The flocculation performance of AP-g-C and AP-AT-C were studied in kaolin suspension using jar test and settling test methods at neutral pH. Dye (Methylene blue) removal tests were performed using polymer beads and analysed by UV-vis spectroscopy.
采用过硫酸铵（APS）作为引发剂，通过自由基聚合合成了基于支链淀粉（AP）、丙烯酰胺（AM）和（3-丙烯酰胺丙基）三甲基氯化铵（ATMAC）的新型阳离子絮凝剂。通过改变丙烯酰胺和（3-丙烯酰胺丙基）三甲基氯化铵单体的比例，合成了三种不同等级的新型阳离子絮凝剂（AP-g-C1 至 AP-g-C3）。在存在 NaOH 的情况下，通过这些絮凝剂的水解，合成了三种不同等级的两性聚合物（AP-AT-C1 至 AP-AT-C3）。通过各种方法对合成的聚合物进行了表征，即红外光谱、NMR 光谱、热分析、粘度测量、扫描电子显微镜和 X 射线衍射。在中性 pH 下，使用搅拌试验和沉降试验方法，在高岭土悬浮液中研究了 AP-g-C 和 AP-AT-C 的絮凝性能。使用聚合物珠粒进行染料（亚甲蓝）去除试验，并通过 UV-vis 光谱进行分析。
