丙烯酰胺/甲基丙烯酸丁酯改性纤维素的研究

Research of cellulose modified with acrylamide/butyl methacrylate

以纤维素为基体,丙烯酰胺(AM)、甲基丙烯酸丁酯(BMA)为接枝单体,过硫酸钾为引发剂,N,N'-亚甲基双丙烯酰胺为交联剂,聚乙烯吡咯烷酮为分散剂,通过悬浮接枝聚合法制备出了纤维素基吸水吸油材料;考察了单体用量、引发剂用量、反应时间、反应温度及交联剂用量等因素对接枝聚合物的吸水、吸油性能的影响。结果表明:在单体与纤维素的质量比为3.0∶1.0,AM∶BMA的质量比为2.0∶1.0,相对于单体,引发剂质量分数为6.0%,交联剂质量分数为0.5%,分散剂质量分数为0.5%,反应温度为70℃,反应时间为4 h的条件下,得到纤维素-AM-BMA接枝共聚物,其吸油倍率为11.55 g/g,吸水倍率为23.51 g/g,聚合度为534.6。

A water and oil absorptive cellulose-based material was prepared from cellulose modified with acrylamide （AM） and butyl methacrylate （BMA） using potassium peroxydisulfate as an initiator, N, N＇-methylene-bis-acrylamide as a crosslinker and polyvinylpyrrolidone as a dispersant. The effects of monomer dosage, initiator amount, reaction time and temperature and crosslinker amount on the water absorbing and oil absorbing ability of the graft copolymer were investigated. The results showed that the obtained cellulose/AM/BMA graft copolymer had the oil absorbency of 11.55 g/g and water absorbency of 23.51 g/g when the process conditions were as followed ： monomer-and-cellulose mass ratio 3.0 ： 1.0, AM-and-BMA mass ratio 2.0 ： 1.0, 6.0% initiator, 0.5% crosslinker and 0.5% dispersant based on monomer by mass fraction, reaction temperature 70 ℃, reac- tion time 4 h.