The effect of shear flow on the Helfrich interaction in lyotropic lamellar systems
The effect of shear flow on the Helfrich interaction in lyotropic lamellar systems
复制标题
剪切流对溶致层状系统 Helfrich 相互作用的影响
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
P. Olmsted
中科院分区：
文献类型：
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作者：
S. Marlow;P. Olmsted
摘要：研究了剪切流动对溶性表面活性剂近晶流体中熵富helrich相互作用的影响。我们认为，由于单层间摩擦、双层碰撞和对流的结合，流动在双层中引起了有效的各向异性表面张力，我们计算了波动的减少，从而计算了有效压缩模量和稳态层间距的重归一化变化。我们证明了非渗透性或慢渗透性膜可能容易受到hellich - hurault型波动不稳定性的影响，并推测这种不稳定性可能是过渡到多层囊泡的一个来源。
Abstract:We study the effect of shear flow on the entropic Helfrich interaction in lyotropic surfactant smectic fluids. Arguing that flow induces an effective anisotropic surface tension in bilayers due to a combination of intermonolayer friction, bilayer collisions and convection, we calculate the reduction in fluctuations and hence the renormalised change in effective compression modulus and steady-state layer spacing. We demonstrate that non-permeable or slowly permeating membranes can be susceptible to an undulatory instability of the Helfrich-Hurault type, and speculate that such an instability could be one source of a transition to multilamellar vesicles.