阿拉伯胶基高吸水树脂的合成与吸水性能

Synthesis and Swelling Characteristics of Gum Arabic-Based Superabsorbent Resin

摘要:

以阿拉伯胶（GA）、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酰胺(AM)为原料，通过接枝共聚合成了GA-g-P AM / AMPS高吸水性树脂，利用FTIR、XRD和SEM分析了树脂的结构，探讨了树脂在不同溶液的溶胀行为。结果显示：GA与AM、AMPS之间发生了接枝共聚反应，GA用量为10wt%时树脂在去离子水和生理盐水中的最大吸水倍率分别为783g/g和91g/g。适量引入GA能提高树脂的吸水倍率和增强树脂的pH稳定性。树脂在pH溶液中表现出良好的响应性和可逆性能。树脂的吸水倍率随着无机盐溶液浓度和金属价态的增加而减少，表面活性剂对树脂的吸水性能有显著的影响，树脂具有较好的保水性能。

Abstract:

Novel Gum Arabic （GA）graft 2-acrylamido-2-methylpropanesulfonicacid (AMPS) and acrylamido (AM) biomass resin adsorption (GA-g-PAM/AMPS) was synthesized by grafting polymerization. The structure of superabsorbent resin were characterized by FTIR, XRD and SEM, respectively. The effects of various solutions on swelling properties were evaluated. The results showed that GA, AM and AMPS happened the grafting copolymerization reaction. The resin containing10wt% GA showed the highest water absorbency of 835g/g and 96g/g in the deionized water and in normal saline, respectively. Swelling behaviors revealed that introduction of GA simultaneously into the polymeric network could improve the water absorption capacity and pH stability of superabsorbent resin.The resin showed remarkable sensitivity and reversible characteristics in pH solutions. The water absorbency of the superabsorbent decreases with increasing metal ions and concentration of various external saline solutions，surfactant solutions showed greater influence on the swelling behaviors. Superabsorbent polymer had a good performance of water retention capacity.