羧甲基纤维素接枝AM和DMC制备高吸水性树脂研究

采用水溶液聚合法,以(NH4)2S2O8-NaHSO3为引发剂、N,N′-亚甲基双丙烯酰胺(NMBA)为交联剂,单体丙烯酰胺(AM)和甲基丙烯酰氧乙基三甲基氯化铵(DMC)与羧甲基纤维素(CMC)接枝共聚,制得含有阳离子和非离子亲水基团的耐盐高吸水性树脂,研究了聚合反应条件对树脂吸水性能的影响.结果表明,在m(AM):m(DMC)=3:1、CMC加量为单体质量的4%～5%、引发剂占单体质量的0.3%～0.4%、交联剂占单体质量的0.5%、聚合温度为55～60℃、反应时间为3～4 h的优化反应条件下,所得树脂吸去离子水率为430 g·g-1,吸0.9%NaCl盐水率为86 g·g-1.

Study on Preparation of Superabsorbent Resin of Carboxymethyl Cellulose-g-AM-DMC

The superabsorbent and salt-resistant resin,which contained cationic and non-ionic hydrophilic groups,was synthesized with monomers acrylamide(AM)and 2-(methylacryloyloxy)ethyl] trimethylammonium chloride(DMC) grafted onto carboxymethyl cellulose(CMC) by solution polymerization,using ammonium persulfate-sodium bisulfite as initiator and N,N'-methylenebisacrylamide(NMBA) as crosslinking agent.The factors affecting the water absorbent capacity of the resin were investigated in detail.The experimental results...