Synthesis of cellulose-based superabsorbent resin by ultrasound irradiation

A cellulose-based superabsorbent resin was synthesized from carboxymethyl cellulose and acrylic acid by ultrasound irradiation.The synthesis technology and the properties of superabsorbent resin were both studied.The effects of the ultrasound power,the water bath temperature,the neutralization degree of acrylic acid,the crosslinker and solvent content on the water absorption capacity of the superabsorbent resin were all investigated.The optimized synthesis condition was determined by the L16(45) table.The water absorbency and saline solution absorbency of the superabsorbent resin were 925 g/g and 95 g/g,respectively.The superabsorbent resin also exhibited good water retaining capacity and water absorption rate.The IR and SEM analyses indicated that the acrylic acid was successfully grafted onto the backbone of cellulose and the superabsorbent resin possessed porously three-dimensional structure.