羧甲基纤维素制备高吸水性树脂的研究

Study on the preparation of super absorbent resin by carboxymethyl cellulose

以羧甲基纤维素(CMC)、丙烯酸(AA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)为原料,用过硫酸钾为引发剂,N,N’-亚甲基双丙烯酰胺为交联剂,经接枝共聚制备高吸水性树脂,讨论了反应时间、丙烯酸中和度、引发剂用量等对反应的影响。结果表明,最优工艺条件为:CMC、AA、AMPS的量分别为1,8,3.5 g,引发剂量为0.15 g,交联剂量为0.02 g,AA中和度为80%,在50℃下反应2 h。所得产物吸水倍率为580 g/g,吸水速率为80 g/m in。

The carboxymethyl cellulose（CMC）,acrylic acid（AA） and 2-acrylamide-2-methyl propane sulfonic acid（AMPS） were used as raw materials,potassium persulfate was taken as initiate agent,N,N＇-methylene bisacrylamide as crosslinking agent,the super absorbent resin was prepared by graft copolymerization.The results showed the optimum conditions were as follows：the dosage of CMC,AA and AMPS were 1,8 and 3.5 g,respectively,the dosage of initiate agent was 0.15 g,the dosage of crosslinking agent was 0.02 g,the neutralization degree of AA was 80%,the reaction temperature was 50 ℃,the reaction time was 2 h.The water absorption and water absorption velocity reached 580 g/g and 80 g/min,respectively.