化工进展2018，Vol.37Issue(7)：2806-2813,8.DOI:10.16085/j.issn.1000-6613.2017-1742
琥珀酰壳聚糖季铵盐的合成及絮凝性能
Synthesis and flocculation properties of succinyl chitosan quaternary ammonium salt
摘要
Abstract
The application of the chitosan in flocculation is limited by its poor water solubility and low charge density. Chemical modifications of the chitosan can improve its water solubility and flocculation performance. The formation of Schiff base (B-CTS) by the chitosan and the benzaldehyde protects the amino group of the chitosan. Then B-CTS is reacted with the succinic anhydride to synthesize succinyl chitosan (SACTS) and further reacted with dimethyl diallyl ammonium chloride (DMDAAC) to synthesize succinyl chitosan quaternary ammonium salt (SAQCS). The structure and morphology of SAQCS were characterized by FTIR, 1HNMR, XRD, and ESEM. The effects of initiator dosage, monomer ratio, reaction temperature and reaction time on the cationic degree of SAQCS were discussed. The results showed that the optimum conditions were as follows:the initiator dosage was 2%, the m(DMDAAC)/m(SACTS)=5.4, the reaction temperature was 70℃, and the reaction time was 7h. Under those process conditions, the cationic degree of SAQCS was 42.26%. The flocculation experiment of SAQCS, CTS, CPAM and Kaolin simulated wastewater was carried out. The effects of H, dosage and temperature on flocculation were investigated. The results showed that the turbidity removal rate of supernatant was above 96% after flocculation when the flocculation conditions were pH = 2—5, the dosage was 3—9mg/L, and the temperature was 25—50℃.关键词
壳聚糖/氨基保护/生物质/絮凝/高岭土Key words
chitosan/amino protection/biomass/flocculation/Kaolin分类
化学化工引用本文复制引用
郭睿,郭煜,王映月,宋博,马兰,张瑶..琥珀酰壳聚糖季铵盐的合成及絮凝性能[J].化工进展,2018,37(7):2806-2813,8.基金项目
陕西省教育厅服务地方专项计划(15JF011)及陕西省工业科技攻关(2016GY-146)项目. （15JF011）
