Time-Resolved Dynamic Light Scattering Study on gelation and Gel-melting Processes of Gelatin Gels

摘要

The gelation and gel-melting processes have been investigated by time-resolved dynamic light scattering for gelatin aqueous solution (1) during both cooling and heating processes with a fixed rate (0.10 deg C/min) and (2) after quenching from 50 to 10 deg C. In both cases, the gelatin threshold was clearly observed as (i) appearance of strong fluctuations in scattered intensity, (ii) a power-law behavior in the time-intensity correlation function (ICF), and (iii) deviation of the initial amplitude of ICF. The physical implication of these phenomena is discussed.