Swelling behavior of super-absorbent polymer gels

Toshikazu Ono, Takahiro Sugimoto, Seiji Shinkai, Kazuki Sada

Research output: Contribution to conferencePaperpeer-review


We previously report development of a new class of ionic polymer gels having lipophilic ion-pairs that consist of a lipophilic tetraphenylborate anion and a quaternary ammonium cation with long alkyl chains. They swelled largely in the less polar solvents as 'super-absorbent' ionic polymer gels. The driving force of the large swelling was osmotic pressure induced by dissociation of lipophilic ion-pairs in these solvents. Here we wish to present discontinuous volume phase transition of 'super-absorbent' ionic polymer gels the by change of solvent polarity even in low dielectric media. Moreover, we investigated the effect of neutral comonomers to swelling behaviours in various organic solvents by changing the length of their alkyl chains. The ionic polymer gels with longer alkyl chain swelled in a large magnitude in the less polar solvents and those with shorter alkyl one did in more polar solvents.

Original languageEnglish
Number of pages2
Publication statusPublished - Dec 1 2006
Event55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan
Duration: Sept 20 2006Sept 22 2006


Other55th Society of Polymer Science Japan Symposium on Macromolecules

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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