Abstract
A new amphoteric superabsorbent hydrogels were synthesized by graft copolymerization blending based on acrylamide (AM), diallydimethylammonium chloride (DMDAAC) and sodium starch sulfate (SSS). The effect of polymerization conditions on swelling capacity was investigated. The results showed that the swelling capacity was affected by various factors, such as polymerization temperature, concentration of initiator and crosslinker, and dose of AM. Additionally, the results testified that salt bond was a potential crosslinking factor in the amphoteric hydrogel. The maximum swelling capacity in distilled water and saline solution reached 1493.1 and 91.0 g/g, respectively. These results were compared with those obtained from original starch-based hydrogel.
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