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بررسی ترمودینامیکی مایسلی شدن سورفاکتانت تترا دسیل تری متیل آمونیوم برمید درمخلوط های متانول/ اتانول/ پروپانول + آب و رنگینه های سان ست یلو /پانسوآ رد با استفاده از هدایت سنجی | ||
| شیمى کاربردى روز | ||
| دوره 18، شماره 66، فروردین 1402، صفحه 159-172 اصل مقاله (1.33 M) | ||
| نوع مقاله: مقاله علمی پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22075/chem.2022.25943.2044 | ||
| نویسندگان | ||
| فاطمه داودی؛ حمید دژم پناه* ؛ بهرام قلمی چوبر | ||
| گروه شیمی، دانشکده علوم پایه، دانشگاه گیلان ، رشت، ایران | ||
| تاریخ دریافت: 12 بهمن 1400، تاریخ بازنگری: 01 خرداد 1401، تاریخ پذیرش: 02 شهریور 1401 | ||
| چکیده | ||
| در این تحقیق رفتار مایسلی شدن سورفاکتانت تترا دسیل تری متیل آمونیوم برومید (TTAB) در درصد های جرمی مختلف از مخلوط حلال های آبی متانول، اتانول، و پروپانول (10-30 درصد) و غلظت های مختلفی ازمحلول های آبی رنگینه های پانسوآ رد و سان ست یلو (001/0 تا 007/0 میلی مولار) با استفاده از تکنیک هدایت سنجی در دماهای مختلف ( 298 تا 313 درجه کلوین)، مورد بررسی قرار گرفت . مقادیر نقطه بحرانی مایسلی شدن و درجه یونش آن تعیین شد. نتایج به دست آمده نشان داد که با افزایش درصد جرمی متانول و اتانول غلظت بحرانی مایسلی شدن افزایش می یابد اما با افزایش پروپانول غلظت بحرانی مایسلی شدن کاهش می یابد. همچنین نتایج به دست آمده نشان داد که غلظت بحرانی مایسلی شدن با افزایش غلظت رنگینه های پانسوآ رد و سان ست یلو کاهش می یابد. همچنین ،خواص ترمودینامیکی مانند انرژی آزاد گیبس، آنتالپی و آنتروپی بعنوان تابعی از دما، غلظت رنگینه وکسر های جرمی الکل ها محاسبه شد. | ||
| کلیدواژهها | ||
| هدایت سنجی؛ مایسلی شدن؛ تترا دسیل تری متیل آمونیوم برومید؛ متانول؛ اتانول؛ پروپانول؛ پانسوآ رد و سان ست یلو | ||
| عنوان مقاله [English] | ||
| Thermodynamic study on micellization of tetradecyltrimethylammonium bromide surfactant in mixes methanol/ethanol/propanol +water and Ponceau 4R and Sunset yellow FCF dyes using of conductometric measurement | ||
| نویسندگان [English] | ||
| Fatemeh Davoudi؛ Hamid Dezhampanah؛ Bahram Ghalami-Choobar | ||
| Department of Chemistry, Faculty of Basic Sciences, Gilan University, Rasht, Iran | ||
| چکیده [English] | ||
| In this work, the micellization behavior of tetradecyltrimethylammonium bromide (TTAB) surfactant was investigated in aqueous solvent mixtures of methanol, ethanol and propanol on different mass fractions (10-30%) and aqueous solution of Ponceau 4R and Sunset yellow FCF dyes at concentrations (0.001-0.007mM) based on conductometric technique at T=(298-313)K. The critical micelle concentration (CMC) values and dissociation degrees of TTAB surfactant were determined. The obtained results showed that the CMC value increases with rising of methanol and ethanol mas fractions but the CMC value decreases with rising of propanol mas fractions. Also, the obtained results indicated that the CMC value decreases with concentration increasing of Ponceau 4R and Sunset yellow FCF dyes. In addition, thermodynamic properties such as the Gibbs energy, enthalpy and entropy of micellization were calculated as a function of temperature, dye concentration and alcohol mass fractions. | ||
| کلیدواژهها [English] | ||
| Conductometric, Micellisation, propanol, Ponceau 4R and Sunset yellow FCF, Tetradecyltrimethylammonium bromide. | ||
| مراجع | ||
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