Change in viscoelastic behaviors due to phase transition of the assembly comprising cetyltrimethylammonium chloride cetyl alcohol water
Change in viscoelastic behaviors due to phase transition of the assembly comprising cetyltrimethylammonium chloride cetyl alcohol water
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DOI：
10.1021/la981507e
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发表时间：
1999-06-22
期刊：
影响因子：
3.9
通讯作者：
Senna, M
中科院分区：
文献类型：
--
作者：
Yamagata, Y;Senna, M
基于动态粘弹性理论，主要利用Cole-Cole图分析了十六烷基三甲基氯化铵（C（16）CA）、十六醇（C16 OH）和水组成的分子组装体的相变过程.在75 ℃下制备的组装体在制备后立即显示洋葱状多层囊泡（直径为0.2-5 μ m），但在老化时转化为囊泡的念珠状网络，并最终通过多面体融合成薄片。组装体的动态模量（G '）随频率单调增加，而损耗模量（G“）显示2个峰。从Cole-Cole图计算的角度参数（α（L），α（S））的变化指示长和短时间松弛机制，分别对应于凝结囊泡和层粘连的网络。
The phase transition process of molecular assembly comprising cetyltrimethylammonium chloride (C(16)CA), cetyl alcohol (C16OH), and water was analyzed on the basis of dynamic viscoelasticity, mainly by using Cole-Cole plots. The assembly prepared at 75 degrees C showed onionlike multilamellar vesicles (0.2-5 mu m in diameter) immediately after preparation but transformed on aging into a rosary network of vesicles and finally fused into lamellae via polyhedra. The dynamic modulus (G') of the assembly monotonically increased with frequency, while the loss modulus (G ") showed 2 peaks. The change in the angle parameters (alpha(L), alpha(S)) calculated from Cole-Cole plots indicate the long and short time relaxation mechanisms, corresponding to the network of coagulated vesicles and lamellae, respectively.