Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (05): 408-412.doi: 10.3866/PKU.WHXB19990505

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Stimuli Response of Polysoap Hydrogels under Electric Fields

Yang Ya-Jiang, Zhao Yan-Bing, Jan B.F.N.Engberts   

  1. Department of Chemistry,Huazhong Univeristy of Science and Technology,Wuhan 430074|Department of Organic nd Moleculr Inorganic Chemistry,University of Groningen,Nijenborgh4,9747 AG Groningen,The Netherlands
  • Received:1998-08-12 Revised:1998-09-28 Published:1999-05-15
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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 bromide ) (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.

Key words: Polysoap hydrogels.DC dectric fields, Deswelling, Bending angle