Study on the preparation of super absorbent resin by carboxymethyl cellulose

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.