【摘要】 采用微波辐射技术,以过硫酸钾为引发剂进行淀粉接枝共聚丙烯酸,建立了耐盐性高吸水性树脂的合成工艺。通过优化实验确定最佳工艺条件为:单体丙烯酸中和度为40％,每克淀粉的引发剂(质量浓度为20 g/L的K2S2O8溶液)用量为0.5ml,单体与淀粉质量比4:1,在功率为360 w的微波辐射下反应14 min。在上述最佳工艺条件下,制备出吸水率和吸盐水率分别为995 g/g和182 g/g的耐盐性高吸水树脂。并对各工艺参数(如树脂粒径、单体中和度、单体与淀粉质量比、引发剂用量等)对高吸水性树脂吸(盐)水性能的影响及保水性能等进行了研究探讨。更多还原

【Abstract】 A new synthesizing process of anti-salt superabsorbent resin was put forward based on the graft copolymerization of acrylic acid(AA) onto starch under microwave radiation by using K2S2O8 as initiator. Salt-resisting superabsorbent resin can be synthesized in 14 min through the optimization of experiment of AA neutralization degree being 40% , m(AA): m(starch) = 4:1 and 0.5 ml 20 g/L K2S2O8 per gram of starch. Under optimal operating conditions, the absorbability for distilled water and 0.9% NaC1 solution was 995 g/g and 182 g/g respectively.Effects of process parameters such as resin particle size, AA neutralization degree, ratio of AA and starch, and content of initiator, etc. on the absorbability of superabsorbent were discussed.更多还原