微波辐射CMC-g-PAMPS/APT高吸水树脂的制备及表征

Synthesis and Characterization of CMC-g-PAMPS/APT Superabsorbent Resin by Microwave Irradiation

摘要:

以2-丙烯酰胺基-2-甲基丙磺酸(AMPS)为单体，凹凸棒黏土(APT)和羧甲基纤维素钠(CMC)为复合组分，采用微波辐射方法制备了CMC-g-PAMPS/APT环境友好复合高吸水性树脂，探讨了合成该树脂适宜的反应条件，并利用FTIR对树脂的结构进行了表征。结果表明，APT和CMC参与了接枝共聚反应；适宜的合成条件下，树脂在去离子水和生理盐水中的吸水倍率分别为834 g/g和78 g/g；树脂的吸水倍率随盐溶液浓度和金属离子价态的升高快速下降；在树脂中引入适量的APT用量能显著提高树脂的吸水倍率、耐盐性能和pH稳定性。

Abstract:

Using 2-acrylamido-2-methyl propane sulfonic acid(AMPS) as monomer, attapulgite (APT) and carboxymethylcellulose (CMC) as composite components, novel eco-friendly carboxymethyl cellulose-g-poly(2-acrylamido-2-methyl propane sulfonic acid)/attapulgite superabsorbent composites were synthesized by means of microwave irradiation.The suitable reaction condition of of superabsorbent resin was investigated .The chemical micstructure of superabsorbent resin were determined by FTIR. The results showed that CMC and APT participated in grafting copolymerization reaction，and the water absorbency of superabsorbent resin is 834g/g in the deionized water and 78g/g in normal saline respectively under the suitable conditions. the water absorbency of superabsorbent was decreased quickly with the increase of salt concentration and the valence of metal cation. The water absorbency, salt-tolerant performance and pH stability of superabsorbent resin could be remarkably enhanced by introducing a proper amount of APT.