Shear-induced states of orientation of the lamellar phase of C12E4/water
Shear-induced states of orientation of the lamellar phase of C12E4/water
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DOI：
10.1021/la9904105
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发表时间：
1999-10-26
期刊：
影响因子：
3.9
通讯作者：
Roux, D
中科院分区：
文献类型：
--
作者：
Müller, S;Börschig, C;Roux, D
用偏光显微镜、粘度计、小角光散射和氘核磁共振谱研究了四甘醇单十二烷基醚（C12 E4）在水溶液中层状溶致中间相的剪切诱导取向状态。含有40 w/w %表面活性剂的溶液显示出从取向层的状态（其法线平行于速度梯度）到多层囊泡的紧密堆积（洋葱状态）的连续过渡。囊泡的尺寸（直径d）由剪切速率（γ）对点控制，遵循与（γ）对点（a）成比例的关系d，近似为-0.5。
The shear-induced states of orientation of the lamellar lyotropic mesophase of tetraethylene glycol monododecyl ether (C12E4) in water are investigated by polarizing microscopy, viscometry, small-angle light scattering, and deuteron NMR spectroscopy. The solution containing 40 w/w % surfactant shows a continuous transition from a state of aligned layers, whose normal is parallel to the velocity gradient, to a close packing of multilamellar vesicles (onion state). The size of the vesicles (diameter d) is controlled by the shear rate (gamma) over dot, following the relationship d proportional to (gamma)over dot(a) with a approximate to -0.5.