کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
613498 880723 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adsorption of poly(styrene sulfonate) of different molecular weights on α-alumina: Effect of added sodium dodecyl sulfate
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Adsorption of poly(styrene sulfonate) of different molecular weights on α-alumina: Effect of added sodium dodecyl sulfate
چکیده انگلیسی

The adsorption of poly(styrene sulfonate), PSS, of different molecular weights (70,000, 500,000, and 1,000,000 mol/kg), from aqueous solutions on α-alumina has been investigated. PSS of the lower molecular weight adsorbs less than the others whose adsorption isotherms overlap. The adsorption is found to increase with increasing ionic strength of the solutions indicating that both electrostatic and non-electrostatic contributions are involved in the adsorption process. Upon addition of the anionic surfactant, sodium dodecyl sulfate, SDS, PSS is found to adsorb less the more SDS added. SDS is found to be preferentially adsorbed as shown both from the simultaneous adsorption of the components and also from the sequential adsorption process where SDS in all cases displaces preadsorbed PSS from the solid surface. The displacement of preadsorbed polyelectrolyte by surfactant is a very slow process and the displacement is less pronounced as the molecular mass of the polyelectrolyte increases indicating the fewer number of contact points to the surface. This is further underlined by the effect on the displacement of PSS by SDS upon increasing the ionic strength of the solutions.

The adsorption of poly(styrene sulfonate), PSS, of different molecular weights from aqueous solutions on α-alumina has been investigated. The effect of added anionic surfactant and the influence of ionic strength on both adsorption and desorption of PSS has also been monitored.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 296, Issue 1, 1 April 2006, Pages 64–70
نویسندگان
, ,