Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 38, Issue 12, Pages 1785-1791Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01932691.2017.1283510
Keywords
Gemini surfactant; mixed micelle; Pluronic F-68; surfactant-polymer interactions
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Funding
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, Jeddah [CEAMR-SG-5-438]
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In the current work, we have examined the interaction activities of Pluronic F-68 with cationic conventional, cetyltrimethylammonium bromide (CTAB), and gemini surfactant, pentanediyl-1, 5-bis(dimethylcetylammonium bromide), (16-5-16) by means of surface tension and conductivity measurements. The critical micelle concentration (cmc) values of pure 16-5-16 and CTAB have been evaluated tensiometrically and conductometrically, while the cmc values of pure F-68 and binary mixtures were determined only from the surface tension plots. Various interfacial and micellar parameters including surface excess concentration ((max)), minimum area per molecule (A(min)), surface pressure at cmc ((cmc)), packing parameter (p), and interaction parameter () have been estimated and discussed in detail. Various thermodynamic parameters including Gibbs free energy of micellization (), standard free energy of adsorption at the air-water interface (), excess free energy of micellization (Delta G(ex)), and molar free energy at the maximum adsorption achieved at cmc (G(min)) have been calculated. [GRAPHICS] .
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