Diffusion analysis of gelatin solutions by photocorrelation spectroscopy

J. S. Hwang*, Zu-Po Yang, S. B. Dai, S. L. Tyan, M. T. Kuo, C. L. Lin

*Corresponding author for this work

研究成果: Article同行評審

2 引文 斯高帕斯(Scopus)

摘要

The diffusion coefficients and polydispersities of polydisperse gelatin solutions are studied by photocorrelation spectroscopy. The method of cumulant analysis is used in analyzing the autocorrelation data. The z-average diffusion coefficients and polydispersities of the gelatin solutions are obtained from the first and second order cumulants, respectively. Gelatin particles are freely dispersed at low concentrations, but form polymer networks at high concentrations. The z-average free diffusion coefficient is independent of concentration and is proportional to q2. The hydrodynamic radii and polydispersities of the gelatin molecules at different salt concentrations and temperatures are also studied. The results lead to the conclusion that most of the aggregates are covalently linked and that hydrogen-bonded and collagen-folded aggregates do not make significant contributions to the overall aggregate makeup even at temperatures as low as 20°C.

原文English
頁(從 - 到)733-745
頁數13
期刊Chinese Journal of Physics
36
發行號5
出版狀態Published - 1 十二月 1998

指紋 深入研究「Diffusion analysis of gelatin solutions by photocorrelation spectroscopy」主題。共同形成了獨特的指紋。

引用此