聚天冬氨酸/聚丙烯酸互穿网络吸水性树脂的制备

Preparation of Polyaspartic Acid/Polyacrylic Acid Interpenetrating Networks Absorbent Polymer

以交联聚天冬氨酸(PAsp)、丙烯酸(AAc)为原料,以过硫酸钾为引发剂,以N,N′-亚甲基双丙烯酰胺为交联剂,采用分步法制备了聚天冬氨酸/聚丙烯酸(PAAc)互穿网络吸水性树脂(IPNAP),并对其结构进行了表征,探讨了AAc与PAsp质量比、引发剂用量(以单体质量计,下同)、交联剂用量(以单体质量计,下同)、AAc中和度对IPNAP吸液性能的影响。结果表明,当AAc与PAsp质量比为1.0∶1、引发剂用量为0.50%、交联剂用量为0.40%、AAc中和度为75%时,IPNAP的吸液性能最好,在蒸馏水和生理盐水中的吸液倍率分别达到826g·g-1和120g·g-1。

Polyaspartic acid/polyacrylic acid interpenetrating networks absorbent polymer（IPNAP） was pre- pared using polyaspartie acid（PAsp） and acrylic acid（AAc） as raw materials,potassium peroxydisulfate as initi- ator,N,N＇-methylenebisacrylamide as crosslinking agent by two step synthetic method. The IPNAP was char- acterized by FTIR. Effects of mass ratio of AAc to PAsp,initiator amount, crosslinking agent amount,and neu- tralization degree of AAc on absorbing property of IPNAP were studied. The results indicated that when the mass ratio of AAc to PAsp was 1. 0 ： 1, the initiator amount was 0.50%, the crosslinking agent amount was 0. 40%, the neutralization degree of AAc was 75%,the absorbing property of IPNAP was the best with the ab- sorbing ratio of 826 g . g^-1 and 120 g .g^-1in distilled water and normal saline,respectively.