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arXiv 0903.4927cond-mat.soft
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髓鞘图:湿肥皂的屈曲和流动

Myelin figures: the buckling and flow of wet soap

Ling-Nan Zou

摘要:

髓磷脂图形是当某些表面活性剂在过量水中溶胀时形成的界面结构。在这里,我提出的数据和模型计算表明髓鞘的形成和生长是由于表面活性剂的流体流动,在干燥的表面活性剂/水界面的水化梯度驱动;基于这个想法的一个简单的模型定性地再现了在不同的实验中观察到的各种髓鞘生长行为。从一个详细的实验观察髓鞘如何从一个平面前体结构的发展,我确定了一个机械不稳定性,可能是髓鞘形成的基础。这些结果表明,混合的机械特性的表面活性剂层状结构,其中流体和弹性性能共存,是什么使髓鞘的形成和生长。

英文摘要:

Myelin figures are interfacial structures formed when certain surfactants swell in excess water. Here, I present data and model calculations suggesting myelin formation and growth is due to the fluid flow of surfactant, driven by the hydration gradient at the dry surfactant/water interface; a simple model based on this idea qualitatively reproduces the various myelin growth behaviors observed in different experiments. From a detailed experimental observation of how myelins develop from a planar precursor structure, I identify a mechanical instability that may underlie myelin formation. These results indicate the mixed mechanical character of the surfactant lamellar structure, where fluid and elastic properties coexist, is what enables the formation and growth of myelins.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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