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Volumetric Change and Surface Properties of Temperature-Sensitive Polyvinylalcohol (PVA) Hydrogel

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Abstract

Polyvinylalcohol (PVA) polymer gel is a temperature sensitive polymeric gel, with a critical transition temperature (with H2O) of 310 K. At higher than 310 K, this temperature sensitive polymer gel shrinks because of discharging water, whereas at lower temperatures, the gel swelled because of absorbing water. The reversibility of the gel's volume change was confirmed by temperature swing. The adsorption behavior of an organic compound onto the PVA polymer gel in water was tested at various temperatures. The amount of adsorbed organic compound increased remarkably at temperatures higher than about 310 K. Then, it was confirmed that the organic compound in PVA polymer gel could be reversibly adsorbed and desorbed by a temperature change between 293 and 323 K. The mechanism of adsorption of the organic compound onto the PVA polymer gel could be explained by hydration and dehydration of polymer gel.

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Authors and Affiliations

  1. Department of Chemical Engineering, Faculty of Engineering, Kansai University, Suita, Osaka, 564-8680, Japan

    H. Yamamoto, N. Heyamoto, T. Matsui, N. Murayama & J. Shibata

Authors
  1. H. Yamamoto
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  2. N. Heyamoto
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  3. T. Matsui
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  4. N. Murayama
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  5. J. Shibata
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Yamamoto, H., Heyamoto, N., Matsui, T. et al. Volumetric Change and Surface Properties of Temperature-Sensitive Polyvinylalcohol (PVA) Hydrogel. International Journal of Thermophysics 24, 1385–1394 (2003). https://doi.org/10.1023/A:1026163404394

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  • DOI: https://doi.org/10.1023/A:1026163404394

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