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The micelle formation of cationic and anionic surfactants in aqueous medium: Determination of CMC and thermodynamic parameters at different temperatures
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نویسنده
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tennouga l. ,mansri a. ,medjahed k. ,chetouani a. ,warad i.
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منبع
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journal of materials and environmental science - 2015 - دوره : 6 - شماره : 10 - صفحه:2711 -2716
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چکیده
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In this paper,the micellization of anionic surfactant sodium dodecyl sulphate (sds) and cationic surfactant ndodecylpyridinium chloride (dpc) in aqueous solution at various temperatures has been reported using conductivity measurements. the thermodynamic parameters of micellization; the free energy,δgmic 0,the enthalpy,δhmic 0,and the entropy,δsmic 0 were calculated from the critical micelle concentration (cmc) at different temperatures. the results show that the cmc of surfactants decreases to reach a minimum and then increases with temperature. also,the thermodynamic parameters of micellization are discussed.
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کلیدواژه
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Conductivity; Critical micelle concentration (CMC); Micellization; Surfactant; Thermodynamic parameters
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آدرس
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laboratoire d'application des electrolytes et des polyélectrolytes organiques (laepo),université de tlemcen,département de chimie,b. p. 119, Algeria, laboratoire d'application des electrolytes et des polyélectrolytes organiques (laepo),université de tlemcen,département de chimie,b. p. 119, Algeria, laboratoire d'application des electrolytes et des polyélectrolytes organiques (laepo),université de tlemcen,département de chimie,b. p. 119, Algeria, lcae-urac18,faculté des sciences,université mohammed premier,bp 4808,oujda,morocco,laboratoire de chimie physique,centre régionale des métiers de l'education et de formation 'crmef',région de l'orientale, Morocco, department of chemistry,king saud university,p. o. box 2455, Saudi Arabia
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Authors
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