イオン液体と糖の混合水溶液のガラス転移における弾性的性質と熱的性質

概要

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In order to discuss the applicability of ionic liquids to bioprotectants, the aqueous solutions of trehalose, ionic liquids of 1-ethyl-3-methylimidazolium chloride ([emim]Cl) and 1-butyl-3-methylimidazolium chloride ([bmim]Cl) were studied. The elastic anomaly and relaxation dynamics of supercooled liquid and glassy states were investigated by micro-Brillouin scattering spectroscopy and modulated DSC. The refractive index was also measured accurately as a function of content to determine sound velocity and attenuation from Brillouin frequency shift and peak width. The fragility index was determined by using the peak temperatures of imaginary parts of complex heat capacity. It is found that the fragility index of [bmim]Cl solution is higher than that of [emim]Cl solution.
2013-10-15