大连工业大学学报2024，Vol.43Issue(2)：131-135,5.DOI:10.19670/j.cnki.dlgydxxb.2023.6015
新型两性淀粉基絮凝剂的制备
Preparation of novel amphoteric starch-based flocculant
摘要
Abstract
A novel type of amphoteric starch-based flocculant was prepared by grafting acrylamide,methacryloxyethyl trimethylammonium chloride and acrylic acid onto starch with through(NH4)2S2O8 as initiator.The structure of the graft copolymer was characterized by FT-IR,of which results confirmed three types of monomers were successfully grafted onto starch.In order to generate the flocculant with high charge density and optimum anionic/cationic ratios,the conditions were optimized through orthogonal test under the conditions of 1∶1∶1 molar ratio of three types of monomers,and 1∶2.47 mass ratio of starch to monomer.The optimized reaction conditions were as follows:25∶1 mass ratio of starch to ammonium persulfate,initiation time of 22 min,reaction temperature of 63 ℃,pH 4-5,and effective substance content of 17％in the polymerization system.Under the optimal reaction conditions,the total conversion rate of monomer was 99.15％,while the grafting rate of the graft copolymer reached 225％and the grafting efficiency reached 97.72％.The concentration of effective substances for preparing starch-based modified polymer flocculants in aqueous media was elevated,which was beneficial to reducing cost of storage and transportation.关键词
絮凝剂/可溶性淀粉/丙烯酰胺/丙烯酸Key words
flocculant/soluble starch/acrylamide/acrylic acid分类
化学化工引用本文复制引用
句飞,刘诗文,谭凤芝,曹亚峰..新型两性淀粉基絮凝剂的制备[J].大连工业大学学报,2024,43(2):131-135,5.基金项目
辽宁省自然科学基金指导计划项目(2019-ZD-0293). （2019-ZD-0293）
