羧甲基纤维素接枝丙烯酸制备高吸水性树脂的研究

以羧甲基纤维素(CMC)和丙烯酸(AA)为原料,采用水溶液聚合法制备高吸水性树脂。较优的合成条件为:丙烯酸用量为18g时,羧甲基纤维素2 g,去离子水50 g,NaOH 7.2 g,K2S2O8 0.5 g,1 g/L的N,N’-亚甲基双丙烯酰胺溶液3mL,反应温度60℃,反应时间1.5h,真空干燥温度60℃。此条件下所得1g产品能吸收去离子水474.2g。测定了树脂对去离子水、自来水、模拟尿、模拟血和生理盐水的吸液倍率,并研究了产品的吸水速率、保水性和再生性。

Synthesis of Superabsorbent Resin from Carboxymethyl Cellulose and Acrylic Acid by Graft Copolymerization

The superabsorbent resin was synthesized from carboxymethyl cellulose and acrylic acid by aqueous solution polymerization.The optimal synthetic conditions were found as follows: acrylic acid 18 g,carboxymethyl cellulose 2 g,NaOH 7.2 g,deionized water 50 g,K2S2O8 0.5 g,N,N’-methylene bisacrylamide solution(1 g/L) 3 mL,polymerization temperature 60℃,time 1.5 h,and vacuum drying temperature 60℃.This resin could absorb 474.2 times its own mass in deionized water.The absorbencies of this superabsorbent in deionized water,tap water,artificial urine,artificial blood and normal saline were examined respectively.The water-absorbing rate,water-keeping function and reproducibility of the resin were also tested.