Synthesis and flocculation properties of succinyl chitosan quaternary ammonium salt

被引：0

作者：

Guo, Rui ^{[1
]}

Guo, Yu ^{[1
]}

Wang, Yingyue ^{[1
]}

Song, Bo ^{[1
]}

Ma, Lan ^{[1
]}

Zhang, Yao ^{[1
]}

机构：

[1] MOE Key Laboratory of the Chemistry and Technology of Light Auxiliary Chemicals, Shaanxi University of Science and Technology, Xi'an,Shaanxi,710021, China

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2018年 / 37卷 / 07期

关键词：

Flocculation - Chemical modification - Kaolin - Solubility - Ostwald ripening - Chlorine compounds;

D O I：

10.16085/j.issn.1000-6613.2017-1742

中图分类号：

学科分类号：

摘要：

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℃. © 2018, Chemical Industry Press. All right reserved.

引用

页码：2806 / 2813