关键词: 魔芋葡甘聚糖, 丙烯酸, 丙烯酰胺, 接枝聚合, 高吸水性树脂

Abstract:

A superabsorbent resin was prepared through free-radical polymerization in aqueous solution;which used konjac glucomannan（KGM）;acrylic acid（AA）and acrylamide（AM）as raw materials.Graft polymerization was initiated by potassium persulfate（K2S2O8）;with N;N′-methylene-bis-acrylamide（NMBA）was used as crosslinking agent .The relationships between the water absorption of the resin and the amounts of initiator;crosslinker;AA and AM as well as reaction temperature,reaction time were studied.This superabsorbent polymer was capable of absorbing distilled water up to 720 times and 0.9%NaCl solution 110 times in its saturated state at ambient temperature when the mass ratio of KGM to monomer was 1∶4;the amount of initiator was 0.35%（based on the weight of monomer）;the neutralization degree of monomer was 80 %;the reaction temperature was 55～65℃;and the amount of crosslinker was 0.075%（based on the weight of monomer）.Experimental results indicated that the introduction of nonionic group would be suitable for improving absorption ability and salt-resistance of the resulting hydrogels.

Key words: 魔芋葡甘聚糖, 丙烯酸, 丙烯酰胺, 接枝聚合, 高吸水性树脂