用动态光散射跟踪钙-海藻酸水溶液凝胶化

鲁路; 刘新星; 曾钫; 童真

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用动态光散射跟踪钙-海藻酸水溶液凝胶化

研究简报 | 更新时间：2021-03-19

- 用动态光散射跟踪钙-海藻酸水溶液凝胶化
- DYNAMIC LIGHT SCATTERING STUDIES OF SOL-GEL TRANSITION IN AQUEOUS ALGINATE SOLUTION INDUCED BY CALCIUM CATIONS
- 高分子学报 2007年第3期页码：297-300
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- 纸质出版日期：2007-3-10，
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鲁路, 刘新星, 曾钫, 童真. 用动态光散射跟踪钙-海藻酸水溶液凝胶化[J]. 高分子学报, 2007,(3):297-300.

LU Lu, LIU Xinxing, ZENG Fang, TONG Zhen. DYNAMIC LIGHT SCATTERING STUDIES OF SOL-GEL TRANSITION IN AQUEOUS ALGINATE SOLUTION INDUCED BY CALCIUM CATIONS[J]. Acta Polymerica Sinica, 2007,(3):297-300.
鲁路, 刘新星, 曾钫, 童真. 用动态光散射跟踪钙-海藻酸水溶液凝胶化[J]. 高分子学报, 2007,(3):297-300. DOI：

LU Lu, LIU Xinxing, ZENG Fang, TONG Zhen. DYNAMIC LIGHT SCATTERING STUDIES OF SOL-GEL TRANSITION IN AQUEOUS ALGINATE SOLUTION INDUCED BY CALCIUM CATIONS[J]. Acta Polymerica Sinica, 2007,(3):297-300. DOI：

摘要

Abstract

The sol-gel transition of aqueous alginate solutions induced by calcium cations has been studied by using dynamic light scattering.A critical relaxation was observed near the gel point

which was characterized by the power law of the time-intensity correlation function g(2)(t)-1∝t-μ.The comparison of this critical exponent μ with the critical exponent n for mechanical relaxation obtained with dynamic rheology measurements shows μ=2n for the Ca-alginate sol-gel transition.The critical exponent μ was found to be proportional to q2

q is the scattering vector

and the proportional coefficient almost equaled to the correlation length of the critical gel.

关键词

海藻酸凝胶化凝胶化点临界指数动态光散射

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