Abstract:Sepiolite (ST) grafted poly(2 - acrylamido -2 - methylpropanesulfonic acid-co-acrylamide )high-salt superabsorbent resin was synthesized by using microwave irradiation. using sepiolite, 2 - acrylamido -2 - methylpropanesulfonic acid(AMPS) and acrylamide (AM) as raw material. The effects of the concentration of inorganic salt solution, kind of various metal ions and amount of ST on water absorbency of the superabsorbent resin were studied.We had studied the ratio of liquid absorption and water-retention properties of superabsorbent resin. Meanwhile, the microstructure of resin was charactered by FTIR，XRD and SEM. The results indicate that the water absorbency for the superabsorbent resin decreases with increasing concentration of various external saline solutions, and has the following tendency in different metal ions saline solutions：NaCl > CaCl2 > FeCl3, the superabsorbent resin capability of water absorption could be remarkably enhanced by introducing a proper amount of ST. And the superabsorbent resin has a high water-absorbent rate and a good water retentionproperties. FTIR and XRD characterization indicated that ST and organic monomer happened between the grafting copolymerization reaction, The partial monomers were inserted to the ST and the interactaction was formed in the superabsorbent resin. SEM showed that the resin had microporous and laminatestructure.
