کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5410501 | 1506558 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Aggregation behavior of dodecylsulfonate-based surface active ionic liquids in water
ترجمه فارسی عنوان
رفتار همزیستی مایعات یون فعال در سطح دودسیل سولفونات در آب
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کلمات کلیدی
سطح مایع فعال یونی الکترولیت آلی، جذب سطحی، شکل گیری میله ای،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
Halogen-free, low-cost alkylsulfonate-based surface active ionic liquid (SAIL), 1-butyl-3-methylimidazolium dodecylsulfonate ([C4mim][C12H25SO3]) was easily synthesized through ion exchange reaction. Its self-aggregation behavior was systematically investigated by surface tension and electric conductivity measurements. [C4mim][C12H25SO3] has rather lower cmc than the traditional ionic surfactant, sodium dodecylsulfonate (SDDS), while it has higher cmc than the anionic SAIL, 1-butyl-3-methylimidazolium dodecylsulfate ([C4mim][C12H25SO4]), with the same hydrocarbon chain length. The negative ÎGmθ values, mainly result from more negative â TÎSmθ, which demonstrates that the micellization process is spontaneous and entropy-driven in the temperature range investigated. Furthermore, influence of four organic electrolytes, viz. tetraalkylammonium bromides ((CH3)4NBr, (C2H5)4NBr, (C3H7)4NBr, and (C4H9)4NBr), on the aggregation behavior of [C4mim][C12H25SO3] in aqueous solution was studied. The results show that all the electrolytes investigated promote aggregates formation of [C4mim][C12H25SO3]. In addition, to comprehend the discrepancy in the surface activity of alkylsulfate- and alkylsulfonate-based SAILs, theoretical calculations were performed to evaluate the electrostatic potential of the corresponding anion. Compared to [C4mim][C12H25SO4], the inferior surface activity of [C4mim][C12H25SO3] mainly originates from the less electronegativity of its anion. This work illustrates the self-assembly of the environmentally friendly alkylsulfonate-based SAILs and is expected to be useful in the applications of ionic liquids.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 212, December 2015, Pages 23-29
Journal: Journal of Molecular Liquids - Volume 212, December 2015, Pages 23-29
نویسندگان
Yanxin Jin, Lushan Wang, Tao Wang, Peng Chen, Yanhui Bi, Li Yu,