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Positron annihilation lifetime studies of sol-gel transition of carrageenan gels

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Abstract

Positron annihilation lifetime measurement was applied to study the sol-gel transition of anionic polysaccharide aqueous solutions in terms of free-volume parameters the size, intensity, and size distribution of free volumes of the gelation of K-formk-carrageenan solutions as a function of temperature. Slight variations of free volume size and intensity against temperature were observed near 295 K. The correlation of free-volume data with other physical properties vibrational spectra (IR and Raman), conductivity, SAXS, elastic measurement, differential scanning calorimetry were investigated to understand the mechanism of sol-gel transition of carrageenan.

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Authors and Affiliations

  1. Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, 153, Tokyo, (Japan)

    Y. Wakabayashi, K. Ito, H. L. Li & Y. Ujihira

  2. Department of Applied Physics, Waseda University, 3-4-1, Okubo, Shinjyuku-ku, 169, Tokyo, (Japan)

    H. Hashimoto, H. Matsui & A. Chiba

  3. Department of Chemistry, University of Missouri-Kansas City, 64110, Kansas City, Missouri, (USA)

    Y. C. Jean

Authors
  1. Y. Wakabayashi
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  2. K. Ito
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  3. H. L. Li
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  4. Y. Ujihira
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  5. H. Hashimoto
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  6. H. Matsui
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  7. A. Chiba
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  8. Y. C. Jean
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Wakabayashi, Y., Ito, K., Li, H.L. et al. Positron annihilation lifetime studies of sol-gel transition of carrageenan gels. Journal of Radioanalytical and Nuclear Chemistry, Articles 211, 119–126 (1996). https://doi.org/10.1007/BF02036263

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  • DOI: https://doi.org/10.1007/BF02036263

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