Multilamellar Vesicle Formation Probed by Rheo-NMR and Rheo-SALS under Large Amplitude Oscillatory Shear.
Multilamellar Vesicle Formation Probed by Rheo-NMR and Rheo-SALS under Large Amplitude Oscillatory Shear.
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大振幅振荡剪切下通过 Rheo-NMR 和 Rheo-SALS 探测多层囊泡的形成。
DOI：
10.1021/acs.langmuir.8b01510
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
P. Galvosas
中科院分区：
文献类型：
--
作者：
S. Kuczera;L. Gentile;Timothy I. Brox;U. Olsson;C. Schmidt;P. Galvosas
采用空间分辨流变-核磁共振波谱、流变-小角光散射（流变- sals）和常规流变学相结合的方法，研究了三甘醇单正十二烷基醚(C10E3)/水体系溶变层状相中多层囊泡（MLVs）的形成。流变核磁共振硬件的最新进展促进了老挝变形在高场核磁共振磁体中的应用。在研究的应变幅值（10-50）和频率（1和2 rad s-1）范围内，在所有NMR和大多数SALS实验中都观察到MLV的形成。结果表明，与以往以剪切速率为控制参数的稳态剪切实验不同，MLV的大小取决于施加的频率。然而，发现MLV形成的开始随着剪切幅度的变化而变化。老挝测量没有迹象表明中间结构类似于在稳定剪切实验中观察到的排列的多层圆柱体。应力与应变的利萨曲线揭示了从粘弹性固体材料到假塑性材料的转变。
The formation of multilamellar vesicles (MLVs) in the lyotropic lamellar phase of the system triethylene glycol mono n-decyl ether (C10E3)/water is investigated under large amplitude oscillatory shear (LAOS) using spatially resolved rheo-NMR spectroscopy and a combination of rheo-small angle light scattering (rheo-SALS) and conventional rheology. Recent advances in rheo-NMR hardware development facilitated the application of LAOS deformations in high-field NMR magnets. For the range of investigated strain amplitudes (10-50) and frequencies (1 and 2 rad s-1), MLV formation is observed in all NMR and most SALS experiments. It is found that the MLV size depends on the applied frequency in contrast to previous steady shear experiments where the shear rate is the controlling parameter. The onset of MLV formation, however, is found to vary with the shear amplitude. The LAOS measurements bear no indication of the intermediate structures resembling aligned multilamellar cylinders observed in steady shear experiments. Lissajous curves of stress vs strain reveal a transition from a viscoelastic solid material to a pseudoplastic material.
剪切诱导的三嵌段共聚物嵌入表面活性剂层状相的洋葱形成
影响因子：
1.3
作者：
Fujii Shuji;Isono Yoshinobu
通讯作者：
Isono Yoshinobu