摘要
用动态光散射技术跟踪了海藻酸钠水溶液在０．１ｍｏｌ／ＬＣａＣｌ２水溶液中透析凝胶化的过程。表现出随反应进行，平均衰减速率（线宽）Γ明显减慢及以ｌｇβ１／２ｇ（１）（τ）对τ作图表明体系运动模式复杂的特点，这里ｇ（１）（τ）和τ分别是归一化电场时间相关函数及延迟时间。最后还以平均特征松弛时间τｃ（≡Γ－１）对透析时间ｔ作图，定量描述了该凝胶化反应的动力学过程。
Dynamic laser light scattering was used to investigate the gelation of AG aqueous (1 mg/mL) by dialysing in 0.1 mol/L CaCl2 aqueous system. The average decay rates (linewidth) Γ decreased pronouncedly during the gelation and the lg plots of β1/2g(1)(τ) vs τ were nonlinear, which indicated complex motion models in this aqueous system, where g(1)(τ) and τ were normalized electric field autocorrelation function and delay time, respectively. Finally, the plot of characteristic average relaxation time τc (=Γ-1) vs dialysing time t was also given, which described the kinetics process of this gelation quantitatively.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1998年第1期71-74,共4页
Polymer Materials Science & Engineering
