聚天冬氨酸/聚丙烯酸互穿网络吸水性树脂的制备及性能

Preparation and Properties of Interpenetrating Networks Absorbent Polymer Based on Polyaspartic Acid and Polyacrylic Acid

以交联聚天冬氨酸(PAsp)、丙烯酸(AAc)为原料,过硫酸钾为引发剂,N,N-亚甲基双丙烯酰胺为交联剂,采用分步法制备聚天冬氨酸/聚丙烯酸(PAAc)互穿网络吸水性树脂(IPNAP)。利用红外光谱(FT-IR)和扫描电镜(SEM)对产物组成和结构形态进行了表征,探讨了组成对IPNAP吸液性能的影响,研究了IPNAP在不同盐溶液、温度及pH值条件下的吸液性能。结果表明,互穿网络组成对IPNAP吸液性能具有明显的影响,当PAsp/AAc质量比为1时,树脂的吸液性能最好,其在蒸馏水和生理盐水中的吸液倍率分别达到826g/g和120g/g,并且所制备的IPNAP对盐、温度和pH表现出显著的敏感性。

Polyaspartic acid/polyacrylic acid interpenetrating networks absorbent polymer（IPNAP） was prepared using crosslinked polyaspartic acid （PAsp） and acrylic acid（AAc） as the raw material, potassium peroxydisulfate as the initiator, N, N-methylene double acrylamide as the cross linking agents by two-step synthetic methods. The composition, structure and morphology of IPNAP were characterized by Fourier transform infrared spectrum（FT-IR） and scanning electron microscope（SEM）. Effects of composition on the absorbing properties of IPNAP were studied, while the absorbing properties of IPNAP in different salt solutions, different temperatures and different pH solutions were investigated. The results indicate that the composition of IPNAP affects the swelling capacity remarkably. When the mass ratio of PAsp to AAc is 1 ： 1, the swelling ratio of polymer gets the max which are 826 g/g and 120 g/g in distilled water and 0.9 % NaCl solution, respectively. It is found that the IPNAP exhibits the remarkable sensitivity to salt solutions, temperature and pH.