誘電分光による水混合系の特徴付けとフラクタル構造表現における幾何学的特性

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Geometrical features of the fractal structure expression (Y. E. Ryabov, and Y. Feldman, N. Shinyashiki, and S. Yagihara,; J. Chem. Phys. 19, 116 8610 (2002)) and error value of parameters are obtained from fitting procedures of τ-β (relaxation time versus the relaxation-time distribution parameter of Cole-Cole equation) diagram by Ryabov expression. The τ-β diagram obtained by dielectric measurements for the water relaxation process illustrates the fractal structure of polymer water mixture. Dynamics of water molecules included in polymer solution and gel are closely related with structures of the polymer and the network. Water usually exhibits slow dynamics in the polymer matrix. Solution and dispersion systems show characteristic trajectories at upper right and lower left on the diagram, respectively. We confirmed that experimental data for ovalbumin and proteins fall in the dispersion system area. We also compare the fitting error of globular proteins plotted on the τ-β diagram with trajectories obtained for polymer-water mixture. In addition, the fractal dimension, d_G, obtained by Ryabov equation characterizes the water structure in each polymer chain structure.
東海大学の論文