کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5156526 | 1500581 | 2017 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dilational rheology of oil/water interfaces covered by amphiphilic polysaccharides derived from dextran
ترجمه فارسی عنوان
رئولوژی فزاینده ای از رابط های نفتی / آبی که تحت پوشش پلی ساکارید آمفیفیلی قرار می گیرند از دسفران
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
This work studied the adsorption at dodecane/water interface of amphiphilic polysaccharides derived from dextran (a nonionic bacterial polysaccharide) by random attachment of phenoxy groups along the chains (between 10 and 20 attached phenoxy groups per 100 glucose repeat units). The long-time kinetics of interfacial tension decrease was satisfactorily described assuming diffusion-limited adsorption of hydrophobic units (over 4Â h). Dilational rheology of dodecane/water interface was studied for the first time with that kind of amphiphilic polysaccharides and evidenced a significant elastic component. For all dextran derivatives, experimental results were conveniently described using Lucassen-van den Tempel model which assumed diffusion-limited of surface active species. The characteristic frequency increased with the number of attached phenoxy groups and its order of magnitude (10â3-10â2Â rad.sâ1) was consistent with estimations based on the previous model. Experimental results were compared to those obtained with commercial stabilizers like Pluronics (L64, P105, F68 and F127) and Tween 80.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 177, 1 December 2017, Pages 460-468
Journal: Carbohydrate Polymers - Volume 177, 1 December 2017, Pages 460-468
نویسندگان
Jacques Desbrières, Edeluc López-Gonzalez, Antonio Aguilera-miguel, Véronique Sadtler, Philippe Marchal, Christophe Castel, Lionel Choplin, Alain Durand,