Organization of amphiphiles. Part XI: Physico-chemical aspects of mixed micellization involving normal conventional surfactant and a non-ionic gemini surfactant

Misra, Pramila K. ; Panigrahi, Sagarika ; Dash, Uma ; Mandal, Asit Baran (2010) Organization of amphiphiles. Part XI: Physico-chemical aspects of mixed micellization involving normal conventional surfactant and a non-ionic gemini surfactant Journal of Colloid and Interface Science, 345 (2). pp. 392-401. ISSN 0021-9797

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00219...

Related URL: http://dx.doi.org/10.1016/j.jcis.2010.01.066

Abstract

A systematic study on the behaviour of mixtures of p-phenylenediamine-tertiarybutyloxy-carbonyl-bis-glycamide (BAM) with ionic hexadecyl-trimethyl-ammonium bromide (CTAB), and sodium salt of dodecyl sulphate (SDS), and non-ionic surfactant (TritonX-100) in solution has been investigated through different physico-chemical measurements. The mixtures of BAM (0.0194 mM) with various amount of CTAB/SDS/TritonX-100 have been analyzed through absorbance, conductivity, surface tension and zeta potential measurements. The mixed system is found to be more surface active than the individual surfactants, the synergistic interaction being more prominent in system involving ionic surfactants compared to that of non-ionic surfactant. The mixed micellization behaviour is evidenced from the appearance/disappearance of the excimer of the fluorescent probe, maximum adsorption density at the interface, aggregation numbers of the surfactant mixtures and the surface charge of the conventional surfactants. A suitable interaction model, elucidating the organizational hierarchy of gemini-conventional surfactant at the micelle-water and air-water interface has been proposed.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Gemini Surfactant; Zeta Potential; Micropolarity; Surface Charge; Mixed Interaction; Interfacial Adsorption Energies; Maximum Adsorption Density
ID Code:19563
Deposited On:22 Nov 2010 12:23
Last Modified:01 Mar 2011 03:21

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