反相悬浮法制备淀粉接枝丙烯酸高吸水性树脂

摘要

The starch grafted acrylic super absorbent resin was prepared by inverse suspension polymerization,used span -80emulsifier synthesized in our lab as dispersant and potassium persulfate as initiator. The influences of the ratio of starch/monomer,the neutralization degree of monomer,and the amount of initiator and cross - linker were investigated detailedly. The results showed that,when the ratio of starch/ monomer is 1 / 3,the neutralization degree of monomer is 75% ,and the amount of initiator and cross - linker is 0. 4% and 0. 3% ,respectively,the starch grafted resin exhibits 1210g/ g water -absorbency.%本研究以 Span -80自制表面活性剂复配作为分散剂，以过硫酸钾为引发剂引发淀粉接枝丙烯酸进行反向悬浮聚合。详细考察了淀粉/丙烯酸配比、中和度、引发剂用量、交联剂用量等对反向悬浮聚合及接枝聚合物性能的影响。研究结果表明，当淀粉（ST）/丙烯酸（AA）质量比为 m（ST）：m（AA）=1：3、丙烯酸中和度为75％时、引发剂用量为单体质量的4‰、交联剂用量为单体质量的3‰时，制得的接枝产物表现出最高的吸水倍率，达到1210 g/ g。