Study on the Swelling, Shrinking and Bending Behavior of Electric Sensitive Poly (2-acrylamido-2-methylpropane sulfonic acid) Hydrogel

Abstract

Taking 2-acrylamido-2-methylpropane sulfonic acid (AMPS) as monomer, taking N,N-methylenebis acrylamide as the cross linker, and taking the potassium persulfate as the initiators, we adopted the aqueous polymerization to prepare the PAMPS hydrogel and studied the swelling kinetics and electric sensitive properties of the hydrogel. The results indicated that, the swelling process of PAMPS in deionized water exhibited a non-Fickian diffusion model. Applying 15 V contact voltage for 30 minutes, the minimum of mass maintenance rate of PAMPS was 36.82 %. Under noncontact continuous 15 V voltage applied periodically, the PAMPS showed a favorable reversible bending behavior