Study on synthesis and performance of a kind of salt-tolerant superabsorbent resin

The superabsorbent polymer with good salt tolerance was synthesized with acrylamide grafted on xanthan gum through solution polymerization.The effect of factors such as amount of acrylamide,neutralization,amount of alkali,temperature,initiator and cross-linking agent and temperature on the swelling ratio of the superabsorbent polymer were discussed.The results showed that the absorbent ability of this resin was 1 457 g/g for pure water and 623 g/g for NaCl solution under the condition that reaction temperature 60 ℃,m(AM) ∶m(XG)=6 ∶1 and m(NaOH) ∶m(AM)=1 ∶1,dosage of initiator 0.07 and cross-linking agent 0.04(based on mass of acrylamide).The speed of water absorption was moderate and water-retention ability was good,it is a kind of water-absorbent with good salt tolerance.