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以N,N’-亚甲基双丙烯酰胺为交联剂,通过微波辐射制备了淀粉接枝丙烯酸高吸水树脂.研究了淀粉和引发剂类型、引发剂及交联剂用量、丙烯酸中和度、淀粉和单体的配比、微波辐射功率及辐射时间对吸水率的影响.结果表明,经过糊化后所制备的树脂吸水率明显提高,糊化过程减小了淀粉种类对吸水率的影响.过硫酸盐类引发剂是一类高效廉价的引发剂.当引发剂(过硫酸钾)和交联剂的用量分别为丙烯酸的0.3wt%和0.02wt%,中和度为60%,玉米淀粉和丙烯酸质量比为0.25时,经231W微波辐射4min,可获得吸水率为1110g·g~(-1)的高吸水树脂.利用微波技术制备吸水树脂可实现合成、干燥一步完成,且无须氮气保护,明显缩短反应时间、简化工艺、降低成本.,A super absorbent resin of starch-acrylic acid graft copolymer was synthesized under microwave irradiation using N,N’-methylene bis-acrylamide as a crosslinking agent. The influences of the selection of starch and initiator, the amount of initiator and crosslinking agent, neutralization degree of acrylic acid( AA) , ratio of starch to AA, microwave power level and irradiation time on the distilled water absorption amount of resin were investigated. The results indicated that the gelation of starch improved the water absorption ratio of resin largely and the process of gelation decreased the effects of starch species on absorption ratio. Persulphate was proved both cheap and effective as initiator. Using c starch as material, the maximum absorption amount of resin was 1110g · G~(-1) under the optimum conditions of 0. 3wt% initiator( potassium persulphate) , 0.02wt% crosslinking agent, 60% neutralization degree of acrylic acid, the ratio of starch to acrylic acid of 0. 25,microwave power level of 231W and 4min. Under microwave irradiation, the synthesis and drying of super absorbent resin could be completed at one step without nitrogen. Compared to conventional heating method, the methods had the striking advantages of short reaction time, simple process and low cost.