马铃薯淀粉耐盐性树脂的合成工艺研究

Study on synthesis craft of potato starch salt-resisting super absorbent polymer

在不通氮气条件下,以马铃薯淀粉、丙烯酸和丙烯酰胺为原料,过硫酸铵为引发剂,甘油为交联剂,采用水溶液聚合法进行接枝共聚制备耐盐性树脂,优化了马铃薯淀粉耐盐性树脂合成工艺。结果表明,当马铃薯淀粉与单体(g/mL)比例为1∶7,丙烯酸与丙烯酰胺摩尔比为0.5∶1,丙烯酸中和度为70%,反应温度60℃,引发剂、交联剂用量分别为单体的0.25%,0.6%(相对于单体的wt%)时,交联时间为1.5h。此条件下制备的高吸水性树脂吸0.9%NaCl倍率达到76g/g,吸蒸馏水倍率达到786g/g。

Without the protection of nitrogen gas,with the materials of potato starch,acrylic acid and acrylamide,ammonium persulfate as initiator with glycerol as crosslinking agent,salt-resisting super absorbent polymers was prepared by aqueous solution polymerization method,and synthesis craft of potato starch salt-resisting super absorbent polymer was optimized. The results were as follows：when mass ratios of starch to monomer was 1∶7,mole ratio AA to AM was 0.5∶1,degree of neutralization was 70%,reaction temperature was 60℃,the amounts of initiator,crosslinking agent were 0.25%,0.6%（based on the amount of monomers）,respectively,cross-linking time was 1.5h. Under this condition,absorption power in 0.9% NaCl was 76g/g,and distilled water absorption of super absorbent polymer was 786g/g.