A series of PVP-P(AAEA-

co

-AA)s-IPN(PVP-SIPN)hydrogels were obtained via solution polymerization using PVP as the second network

PVP-P(AAEA-

co

-AA)/gold nanoparticlescomposite hydrogels(GNPs gel) were synthesis via in situ reduction. The swelling/deswelling properties

temperature sensibility and electric responsive of the hydrogels were studied. The result shows that with the increasing dosage of PVP

the swelling rate

the equilibrium swelling degree diminished; the water-retention rate decreased with the increasing dosage of PVP when the dosage is lower than 5%

however

the water-retention rate rise with the increasing dosage of PVP when the dosage is higher than 5%; the VPTT of the PVP-SIPN hydrogels increased slightly and the temperature sensibility weakened. The addition of gold nanoparticles cut down the equilibrium swelling degree of GNPs gel from 82.3g/g to 22.66g/g. With tha applied voltage

GNPs gel show up a different swelling/deswelling properties

when the dense of ion outside over 0.2mol/L

the hydrogel conducted swelling

on the contrast

it conducted deswelling

and the deswelling ratio of GNPs gel increased with the increasing of the voltage.