کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
613773 880727 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of stress-jump condition on electrophoretic behavior of a spherical dispersion of soft particles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Effect of stress-jump condition on electrophoretic behavior of a spherical dispersion of soft particles
چکیده انگلیسی

The electrophoresis of a concentrated dispersion of soft particles, where a particle comprises a rigid core and an ion-penetrable membrane layer, is modeled theoretically, taking the effect of double-layer polarization into account. In particular, the influence of a stress-jump condition of the flow field at the membrane layer–liquid interface on the electrophoretic mobility of a particle is investigated. The type of particles considered mimic biocolloids, such as cells and microorganisms, and inorganic colloids covered by an artificial polymer layer such as surfactant molecules. A unit cell model is adopted to simulate the present spherical dispersion, and the governing equations and the associated boundary conditions are solved by a pseudo-spectral method based on Chebyshev polynomials. We show that while the stress-jump condition, characterized by a stress-jump coefficient, can have a significant influence on the mobility of a particle, the associated flow field is not influenced appreciably. Also, the influence of the stress-jump condition on the mobility of a particle depends largely on the nature of the membrane layer, characterized by its friction coefficient.

Electrophoresis of a spherical dispersion of soft particles, cell model, stress-jump condition assumed on membrane layer–liquid interface.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 296, Issue 2, 15 April 2006, Pages 756–761
نویسندگان
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