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

Using 2-acrylamido-2-methyl propane sulfonic acid( AMPS) as monomer,attapulgite( APT) and carboxymethylcellulose( CMC) as composite components,a novel eco-friendly superabsorbent resin,carboxymethyl cellulose-g-poly( 2-acrylamido-2-methyl propane sulfonic acid) / attapulgite,was synthesized by means of microwave irradiation. The optimum reaction conditions of the superabsorbent resin were investigated. The chemical microstructure of the superabsorbent resin was determined by FTIR. The results show that CMC and APT participated in the grafting copolymerization reaction,and the water absorbency of the superabsorbent resin was 834 g / g in the deionized water and 78 g / g in normal saline respectively under the optimum conditions. The water absorbency of the superabsorbent resin 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 the superabsorbent resin could be remarkably enhanced by introducing a proper amount of APT.