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以水生植物水花生(Alternanthera philoxeroides,空心莲子草)和丙烯酸为接枝共聚原料,通过自由基反应制备高吸水性树脂,对接枝聚合物进行FTIR、SEM的结构表征,同时对影响吸水树脂性能的因素进行优化。当水花生干粉用量10 g时,优化条件如下:活化温度为35℃,丙烯酸单体与水花生干粉质量比为6:1,丙烯酸中和度为56%,引发剂过硫酸钾的用量为单体质量的1%,交联剂N,N-亚甲基双丙烯酰胺用量为单体质量的0.075%,引发温度为65℃。在此优化条件下制备的吸水性树脂吸水性能最好,对去离子水吸水倍数达到442 g/g。
The super absorbent polymer was prepared by radical reaction of Alternanthera philoxeroides and acrylic acid. The graft polymer was characterized by FTIR and SEM, and the properties of water-absorbent resin The factors are optimized. When the amount of dry peanut powder was 10 g, the optimum conditions were as follows: the activation temperature was 35 ℃, the mass ratio of acrylic monomer to water peanut powder was 6: 1, the degree of neutralization of acrylic acid was 56%, the dosage of initiator potassium persulfate was single 1% of the mass, the amount of the crosslinker N, N-methylenebisacrylamide is 0.075% of the monomer mass, and the initiation temperature is 65 ° C. The water-absorbent resin prepared under the optimized conditions has the best water absorption capacity, and has a water absorption multiple of 442 g / g for deionized water.