作　　者： ;

机构地区： 华南理工大学轻工与食品学院

出　　处： 《精细化工》 2018年第12期2112-2117,共6页

摘　　要： 以马铃薯淀粉为基本骨架,小分子丙烯酸(AA)、弹性直链普鲁兰多糖(PULL)为原料,在过硫酸钾为引发剂、N,N’-亚甲基双丙烯酰胺(MBA)为交联剂的条件下,通过两步水溶液微波法制备了淀粉-丙烯酸盐-普鲁兰多糖半互穿网络聚合材料(st-AA-PULL);采用FTIR、SEM、BET对材料的结构进行了表征,并重点考察了产品的水合特性。结果表明:st-AA-PULL在蒸馏水中的平衡溶胀率高达1333 g/g,在自来水和生理盐水中的平衡溶胀率分别为536、126 g/g;与传统接枝淀粉聚合材料相比,半互穿网络聚合材料具有更优良的保水性,在60℃高温下放置90 min仍保有近30%(质量分数)的水分,重复吸水5次后,吸水率仍可达近52%;在NaCl浓度0.02~0.10 mol/L内,耐盐性也有较大提高,在NaCl浓度为0.10 mol/L时平衡溶胀率仍保持在130 g/g。 Starch-acrylate-pullulan semi-interpenetrating network polymer (st-AA-PULL)was prepared by two-step aqueous solution microwave method using potato starch as basic skeleton,small molecule acrylic acid (AA),structurally elastic straight pullulan (PULL)as raw materials,potassium persulfate as initiator, N,N'-methylenebisacrylamide as cross-linking agent.FTIR,SEM,and BET were used to characterize the resulting st-AA-PULL,and it's hydration characteristics were investigated.The results showed that the equilibrium swelling rate of st-AA-PULL in distilled water was as high as 1333g/g,and that in tap water and physiological saline were 536g/g and 126g/g,respectively.The semi-interpenetrating network material had better water retention compared with traditional polymeric materials,which retained nearly 30% of moisture after standing at 60℃ for 90min.The water absorption rate could still reach nearly 52% after the repeated water absorption for five times.When the concentration of sodium chloride solution ranged from 0.02 to 0.10mol/L,the salt tolerance of st-AA-PULL was also greatly improved.The equilibrium swelling in 0.10mol/L sodium chloride solution maintained at 130g/g.

关 键 词： 淀粉 普鲁兰多糖 互穿网络 水合特性

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