Preparation and Swelling Properties of Gum Arabic Graft AMPS Superabsorbent Resin by Microwave Irradiation

A novel gum arabic-g-poly(2-acrylamido-2-methylpropanesulfonicacid) superabsorbent resin was synthesized by aqueous solution polymerization using microwave irradiation in the presence of potassium persulfate(KPS) as an initiator and N,N-methylene-bis-acrylamide(NMBA) as a crosslinking agent.The effects of the mass ratio of AMPS to GA,crosslinker,initiator,neutralization degree,power and time on the water absorbency of the superabsorbent resin were investigated systematically,and the swelling properties of the superabsorbent resin were studied.The chemical microstructure of GA-g-PAMPS superabsorbent resin was determined by FTIR.Under the optimum reaction conditions,the water absorbency of the superabsorbent resin is 683 g / g in deionized water and137 g / g in normal saline.The water absorbency of the superabsorbent resin decreases with increasing concentration of various external saline solutions,and has the following tendency in different metal ions saline solutions:Na Cl Ca Cl2 Fe Cl3.The superabsorbent resin has a high water absorbency rate and a good reswelling capacity.