کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
592145 1453893 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Molecular array behavior and synergistic effect of sodium alcohol ether sulphate and carboxyl betaine/sulfobetaine in foam film under high salt conditions
ترجمه فارسی عنوان
رفتار آرایه ای مولکولی و اثر سینرژیک سدیم الکل سولفات سدیم و کربوکسی بتایین / سولفوباتین در فیلم فوم تحت شرایط نمک زیاد
کلمات کلیدی
سورفاکتانت های متفرقه اثر هم افزایی، شبیه سازی دینامیک مولکولی، کاتیون های غیر مولد مولکولی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• The foam stability of the mixed surfactant systems under high salinity was studied.
• The detailed molecular array behavior of the surfactant mixtures was investigated by MD.
• How the inorganic cations affect the foam stability of the mixed surfactants was discussed.

In this paper, the molecular array behavior of the mixed systems of anionic–nonionic surfactant sodium alcohol ether sulphate (AES) and zwitteroinic surfactants carboxyl betaine (CAB) or sulfobetaine (DSB) at the gas/water interface in foam films was investigated by molecular dynamics simulation approach, which helped to understand in microscopic view how salts effected the foam stability of the mixed surfactants and their synergistic effect. It was found that the multivalent inorganic cations could be bounded to the negatively charged head groups of the surfactants and participated in the formation of the interface layer directly, not only influenced the interfacial adsorption behavior of the surfactant molecules, but also changed the state of the water molecules in the foam films. Foam decay method was utilized to determine the foam stability experimentally. The experimental results agreed very well with the simulation results. The knowledge about how the microscopic character of the surfactant mixtures at the interface with multivalent cations coexisting effect the foam properties could provide useful guidance for the application of surfactants under high salinity condition, such as the formula design for foam flooding system used in offshore enhanced oil recovery (EOR).

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 480, 5 September 2015, Pages 138–148
نویسندگان
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