A study of dielectric relaxations in galactose-water mixtures

作者：Kwon Hyun Joung; Seo Jeong Ah; Kim Hyung Kook; Hwang Yoon Hwae^*

来源：Journal of Non-Crystalline Solids, 2010, 356(50-51): 2836-2841.

DOI：10.1016/j.jnoncrysol.2010.09.067

• Galactose
• Dielectric loss spectroscopy
• Dielectric relaxation
• JG beta Relaxation
• gamma Relaxation

We studied the frequency dependent dielectric loss spectra of galactose-water mixtures with different water contents in the temperature range which covers the supercooled and glassy states In the frequency range from 10 mHz to 100 MHz first we observed the a relaxation then slow extra relaxation and then fast extra relaxation with increasing frequency The temperature dependent relaxation times of slow and fast extra relaxations were consistent with tau(JG) in the coupling model and that of the gamma-relaxation (S Capaccioli et al 2006) The relaxation time difference and the relaxation strength of the fast extra relaxations relative to the alpha-relaxation respectively decreased and increased as the water content increased indicating that the fast extra relaxation in galactose-water mixtures might be strongly related to the coupling between galactose and water molecules We also

• 出版日期2010-11