Concentration Fluctuations in CTAB/NaSal Solutions
Concentration Fluctuations in CTAB/NaSal Solutions
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DOI：
10.1021/la010844b
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发表时间：
2001-11
期刊：
影响因子：
3.9
通讯作者：
S. Amin;Thomas W. Kermis;R. V. Zanten;and Stephen J. Dees;J. V. Zanten
中科院分区：
文献类型：
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作者：
S. Amin;Thomas W. Kermis;R. V. Zanten;and Stephen J. Dees;J. V. Zanten
本报告详细介绍了动态光散射调查的CTAB/NaSal溶液浓度波动在很宽的范围内的CTAB浓度和NaSal：CTAB摩尔比。对于大于或等于0.02 M的CTAB浓度，观察到两个不同的弛豫时间。的流体动力学相关长度，Δ H，与快速弛豫模式被观察到依赖于CTAB的浓度和NaSal：CTAB的摩尔比。特别是，CTAB的浓度缩放的NaSal：CTAB摩尔比的非单调的方式而变化。标度指数的范围为-0.25到-0.67，其中最小值出现在NaSal：CTAB摩尔比接近1.5−2.0时。缓慢弛豫模式的振幅与NaSal：CTAB摩尔比小于或等于2的流体动力学相关长度强烈相关，从而表明在这些条件下的聚合物/水溶液行为。出现的总体情况是，一个系统中的竞争...
This report details a dynamic light scattering investigation of CTAB/NaSal solution concentration fluctuations over a wide range of CTAB concentration and NaSal:CTAB mole ratio. Two distinct relaxation times are observed for CTAB concentrations greater than or equal to 0.02 M. The hydrodynamic correlation length, ξH, associated with the fast relaxation mode is observed to depend on both the CTAB concentration and NaSal:CTAB mole ratio. In particular, the CTAB concentration scaling of ξH is shown to vary in a nonmonotonic manner with the NaSal:CTAB mole ratio. The scaling exponent is found to range from −0.25 to −0.67, where its minimum value is found for NaSal:CTAB mole ratios near 1.5−2.0. The amplitude of the slow relaxation mode is strongly correlated with the hydrodynamic correlation length for NaSal:CTAB mole ratios less than or equal to 2 thereby suggesting polymer/polyelectrolyte solution behavior at these conditions. The overall picture that emerges is that of a system where the competition among ...