AA/AM/AMPS/SDs复合型高吸水性树脂的合成及性能研究OA

Using acrylic acid(AA),acrylamide(AM),and 2-acrylamido-2-methylpropane sulfonic acid(AMPS)as monomers,modified sawdust(SDs)as filler,and acetone as a porogen,a composite superabsorbent resin with a porous structure,designated as AA/AM/AMPS/SDs,was prepared via inverse suspension polymerization.The effects of SDs content,water-to-oil ratio,initiator content,crosslinker content,neutralization degree of AA,and acetone dosage on the liquid absorbency and water retention performance of the superabsorbent resin were systematically investigated.The results showed that under the conditions of a water-to-oil ratio of 1.0∶2.5,an SDs mass fraction of 1.25%,an initiator mass fraction of 0.5%,a crosslinker mass fraction of 0.03%,a neutralization degree of AA of 75%,and an acetone dosage accounting for 25%of the aqueous phase volume,the superabsorbent resin exhibited optimal performance,with a water absorption ratio of 2 904.15 g/g and a saline absorption ratio of 213.82 g/g.The superabsorbent resin prepared with acetone demonstrated good water retention and reusability.Adding modified SDs and acetone can effectively improve the liquid absorbency of superabsorbent resins.