柚皮粉接枝P(AA-AM)树脂的制备及其尿素吸放性能

Preparation of Pomelo Peel Powder Grafted P(AA-AM) Resin and its Urea Load/Release Properties

摘要:

采用水溶液聚合的方法制备了柚皮粉(PP)接枝聚丙烯酸(PAA)、聚丙烯酰胺(PAM)高吸水树脂（PP-SA），分析了柚皮粉组成，探讨了PP-SA形成机理。利用傅里叶红外光谱（FTIR）和热重（TG）对其结构及热稳定性进行了表征，结果表明PP与PAA、PAM之间发生了接枝共聚反应，PP-SA的热稳定性要优于P(AA-AM)。考察了PP-SA在不同质量浓度的尿素溶液中的吸液倍率、尿素负载量及尿素释放速率，结果显示，PP-SA对6 g/L的尿素溶液有最大的吸收倍率，为362 g?g-1；在10 g/L的尿素溶液中溶胀干燥后的PP-SA有最大的尿素负载量，可达66.7%，其在水溶液中的尿素释放率也最大，达到74%。

Abstract:

superabsorbent polymer composite (PP-SA) was synthesized from the pomelo peel powder (PP) and poly acrylic acid-co-acrylamide(P(AA-AM)) using solution polymerization method. The components of PP were analyzed and the mechanisms for formation of PP-SA were proposed. The molecular structure characteristic of PP-SA was characterized by FTIR. It shows that P(AA-AM) was successfully grafted on PP. The TG result indicates that the thermostability of P(AA-AM) is strengthened by introducing PP into P(AA-AM). The properties of urea solution retention and urea load/release were researched systematically. The retention capability of PP-SA in 6 g/L urea solution was the highest, reaching to 362 g?g-1. The urea loading ratio of PP-SA swelling in urea solution of 10 g/L was 66.7%. And its urea release ratio can reach to 74% in distilled water.