Novel types of polysoap hydrogels based on hydrophobically modified polyelectrolytes crosslinked with N

N-methylenebisacrylamide were prepared by free radical polymerization at 70~80℃ in aqueous solution with ammonium persulfate as initiator.The swelling behaviour of the polysoap hydrogels was studied by immersion of the gels in buffered solution at various pHs and ionic strength.It was found that the structure of the polysoap backbone influenced the pH-dependent swelling and deswelling.The swelling process is reversible after repeating cycles of sweeling and deswelling by the change of pH in appropriate buffered solutions.SEM photographs of polysoap gels indicated that the network structures were characterized with regard to an open

large porous and a close

small polous structures in the polysoap hydrogels.