A series of novel fast responsive and electrically sensitive poly（4-acetyl acryloyl ethyl acetate-co-2-acrylamide-2-methy-1-lpropanesulfonic acid）porous hydrogels were synthesized by radical polymerization using different molecular weights PEG as porogenic agents.The SEM macrograghs revealed that macroporous structure was formed within the hydrogel as porogenic agents PEG was eluted

and the apertures ware between 30 μm and 120 μm.The hydrogel containing PEG6000 as porogenic agent exhibited the highest swelling and deswelling ratio

reached its swelling equilibrium whinin 30 s

get its equilibrium deswelling state within 40 min in NaCl solution and even faster about 12 min under an electric field.The responsive property of hydrogel accelerated as the content of AMPS increased

when the n(AAEA)∶n(AMPS)=1∶1

the hydrogel had a highest deswelling ratio between others.But the hydrophobic group will shrink and form many hydrophobic micro-area under high temperature as the AAEA content increased.This prevented the water discharged continually out of hydrogel

so when n(AAEA)∶n(AMPS)=3∶1

the hydrogel reached its equilibrium deswelling state within 4 min but its water ratio was high up to 75 percent.The high pH will accelerate the dissociation of AAEA

provide more electrified particle

quicken the water discharge and have a short time to reach equilibrium.Also

add the concentration of electrolyte and heighten the electrolysis voltage will shorten the equilibrium deswelling time.