Study on synthesis craft of potato starch salt-resisting super absorbent polymer

Without the protection of nitrogen gas,with the materials of potato starch,acrylic acid and acrylamide,ammonium persulfate as initiator with glycerol as crosslinking agent,salt-resisting super absorbent polymers was prepared by aqueous solution polymerization method,and synthesis craft of potato starch salt-resisting super absorbent polymer was optimized. The results were as follows:when mass ratios of starch to monomer was 1∶7,mole ratio AA to AM was 0.5∶1,degree of neutralization was 70%,reaction temperature was 60℃,the amounts of initiator,crosslinking agent were 0.25%,0.6%(based on the amount of monomers),respectively,cross-linking time was 1.5h. Under this condition,absorption power in 0.9% NaCl was 76g/g,and distilled water absorption of super absorbent polymer was 786g/g.