کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9675528 | 1454099 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of several electrolytes on the rheopectic behaviour of concentrated soy lecithin dispersions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Concentrated dispersions of soy lecithin (60Â g/L) prepared by sonication-freezing-unfreezing method show a non-newtonian behaviour and a significant rheopexy. Shear stress versus shear rate plots shows a loop hysteresis area, which have been studied in soy lecithin dispersions prepared with aqueous solutions of various electrolytes (NaCl, CaCl2, MgCl2 and AlCl3) with concentrations in the range 10â5 to 10â2Â mol/L. Also we have studied the effect of different pH on soy lecithin dispersions. The results have revealed a very sensitive influence of nature, valence and concentration of the respective cations and the pH value on the loop hysteresis area values. It seems to indicate that the vesicle formation by segregation process followed by vesicle fusions is involved in the rheopectic effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 270â271, 1 December 2005, Pages 102-106
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volumes 270â271, 1 December 2005, Pages 102-106
نویسندگان
M. Manconi, J. Aparicio, D. Seyler, A.O. Vila, J. Figueruelo, F. Molina,