A series of electric-sensitive hydrogels were prepared by in-site gel polymerization with 2-acrylamido-2-methyl propyl sulfonic acid (AMPS) as organic monomer and ethyl orthosilicate (TEOS) as inorganic material

using N

N'-methylene bisacrylamide as crosslinking agent and potassium peroxydisulfate as initiator

respectively.The structure of the hydrogels was characterizated by scanning electrical microscopy (SEM).The swelling and deswelling properties of hydrogels in deionized water and in NaCl solution were studied in detail

showing that the equilibrium swelling ratio of the hydrogels ranged from 224.9 to 325.6. And the swelling rate of the composite hydrogels decreased with the increasing content of TEOS

in addition

the deswelling speed of the hydrogel decreased with the increasing concentration of polyion in interior of the hydrogels

except for the ideal hybrid hydrogels.Moreover

the electric sensitivity of the hydrogels was considered.The result revealed that the hydrogels swelled at high concentration of NaCl in solution (higher than that of polyion in interior hydrogels)

but deswelled at low concentration.As for ideal hybrid gel

the reswelling ratios decreased

and the deswelling property was more obvious.Furthermore

the ideal hybrid hydrogels had more ideal mechanical properties than organic gels

and the maximum compressive strength of the hydrogels was about 23.4 MPa.