کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
203910 460685 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solute aggregation in dilute aqueous solutions of tetramethylurea
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Solute aggregation in dilute aqueous solutions of tetramethylurea
چکیده انگلیسی

Aqueous solutions of tetramethylurea (TMU) were studied by small-angle neutron and X-ray scattering at temperatures 10, 25 and 40 °°C in the TMU mole fraction range of 0.0125–0.025. The scattering data indicate preferential attractive interaction between the solute molecules, which becomes stronger as the temperature increases. From SANS data, concentration fluctuations and Kirkwood–Buff integrals have been calculated. The experimental data reveal a considerable solute–solute attraction above 0.01 mole fraction of TMU. These findings indicate that in addition to the usually assumed solute caging by water molecules, solute clustering of hydrophobic nature should also be considered for this system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fluid Phase Equilibria - Volume 257, Issue 1, 15 August 2007, Pages 114–119
نویسندگان
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