Synthesis of superabsorbent resin with the properties of temperature tolerant, salt tolerant, and water absorbency deferred

摘要

In this article, a kind of superabsorbent resin (SAR) was synthesized by copolymerizing acrylic acid (AA) partly neutralized, acrylamide (AM), and polyvinyl alcohol (PVA) with ammonium persulfate/sodium hydrogen sulfite (APS/SHS) as radical initiating system and N , N -dimethylene bisacrylamide as crosslinking agent in aqueous polymerization system at 60°C. This kind of SAR exhibited excellent properties of temperature tolerant, salt tolerant, and water absorbency (WA) deferred. The experiment results showed that the WA at 90°C was about two times than that at 25°C when SAR modified with PVA was immersed in water for 24 h. The absorbency of 0.9% NaCl solution increased from 5 to 60 ml/g when AM was introduced into the SAR networks.