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Abstract
The difference of polysoap hydrogels and normal polyelectrolyte hydrogels is that the former possess hydrophobic side chains. Poly(diallylamie-N N-dodecylmethyldiallylammonium br-omide ) (PDA-C12 ), Poly (N-methyldiallylamine-N, N-dodecylmethyldiallylammonium bromide )(PMDA-C12) and stearic acid modified poly (tetraethylenepentamine-epichlorohydrin) (PTE- C18)contain hydrophobic side chains with 12 carbon and 18 carbon, respectively. The stimuli-response of the gels under electric fields was investigated. Under contact electric fields, the deswelling was observed in the anode side of the gels. Under non-contact electric fields, the gels bend toward the anode.The gels can turn back original sharps and bent toward the cathode with time when higher voltage was applied. These properties of the gels are related to both the change of osmotic pressure caused by mobile ions and hydrophobic interaction.
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