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

摘要： 以魔芋粉，丙烯酸和丙烯酰胺等为原料，经接枝聚合合成了魔芋粉－丙烯酸－丙烯酰胺类超强吸水性树脂。讨论了引发剂，交联剂，丙烯酸，丙烯酰胺等用量以及反应时间和反应温度等因素对树脂吸水性能的影响。结果表明: 在魔芋粉与单体质量比为1:4，引发剂用量为0.35%（占单体的质量）,丙烯酸/丙烯酰胺（质量）为1:1，丙烯酸中和度为80% ，反应温度为55～65℃，交联剂用量为0.75%（占单体的质量）的条件下，制得的SAP吸去离子水可达720g/g，吸0.9%的NaCl溶液为110g/g。

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