丝胶-丙烯酸-丙烯酰胺高吸水性树脂的制备

PREPARATION AND PROPERTIES OF SILK SERICIN-ACRYLIC ACID-ACRYLAMIDE COPOLYMER

实验以过硫酸钾-亚硫酸钠氧化还原体系为引发剂、N,N′-亚甲基双丙烯酰胺为交联剂,制备丝胶-丙烯酸-丙烯酰胺接枝共聚型吸水树脂。产物经红外光谱表征。研究了不同反应条件下得到的聚合物吸蒸馏水和生理盐水的能力,探讨了影响产品吸水性能的因素。结果表明:当引发剂用量与单体总质量比为1.25%,交联剂用量与单体总质量比为0.01%,中和度为75%,丙烯酰胺与丙烯酸质量比为0.7:1,聚合温度55℃,聚合时间6 h时,所得产物吸液能力较佳,随丝胶用量的增加,产物吸液能力缓慢上升。当丝胶用量为4%时,产物吸蒸馏水能力为1 847倍,吸盐水能力为112倍。

The silk sericin-acrylic acid-acrylamide copolymers were synthesized by aqueous solution polymerization with potassium peroxodisulfate-sodium sulfite as redox initiation system and N, N＇-methylenebisacrylamide as crosslinker. The products were characterized by infrared absorption spectroscopy. The synthesis conditions that affect the product water absorption quantity were studied. The optimal reaction conditions were： initiator 1. 25%, crosslinker 0. 01%, neutralization degree 75%, mass ratio of acrylamide to acrylic acid of 0.7, reaction temperature 55℃ and reaction time 6 h. With the amount of silk sericin in polymerization increasing, the product＇s water absorbency slowly increased. When the mass ratio of silk sericin to monomers was 4%, the product could absorb 1 847 times of distilled water and absorb 112 times of 0.9% NaCl aqueous solution. But the product＇s water absorbency gradually decreased when the amount of silk sericin to monomers further increased.