Swelling behavior of super-absorbent polymer gels

Toshikazu Ono, Takahiro Sugimoto, Seiji Shinkai, Kazuki Sada

Research output: Contribution to conferencePaperpeer-review

Abstract

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
Pages4555-4556
Number of pages2
Publication statusPublished - Dec 1 2006
Event55th Society of Polymer Science Japan Symposium on Macromolecules - Toyama, Japan
Duration: Sep 20 2006Sep 22 2006

Other

Other55th Society of Polymer Science Japan Symposium on Macromolecules
CountryJapan
CityToyama
Period9/20/069/22/06

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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