کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1696343 1519125 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
On the refractive index of ageing dispersions of Laponite
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
On the refractive index of ageing dispersions of Laponite
چکیده انگلیسی

Aqueous dispersion of Laponite at low ionic concentration is of interest since it undergoes structural evolution with respect to time, which is usually termed as ageing. In this work we study the refractive index behavior as a function of ageing time, concentration and temperature. We observed that the extended Lorenz–Lorentz equation fitted the refractive index dependence on concentration and temperature very well. The refractive index did not show any dependence on ageing time. However, the dependence of refractive index on concentration showed a marked change as the system underwent transition from an isotropic to a biphasic state. The slope of the refractive index–density data is remarkably close to that of water at all Laponite concentrations. In the context of transport phenomena, optical measurements such as interferometry can exploit the water-like behavior of Laponite dispersions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Clay Science - Volume 42, Issues 1–2, December 2008, Pages 326–330
نویسندگان
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