Journal
COLLOIDS AND SURFACES B-BIOINTERFACES
Volume 114, Issue -, Pages 247-254Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfb.2013.10.017
Keywords
Cationic surfactants; Single-chain surfactants; Dimeric surfactants; Isothermal titration calorimetry; Solubilization capacity; Foamability; Antimicrobial activity; Biodegradability
Funding
- DGCYT [CTQ2009-07478, CGL2010-19303, CGL2010-22068-C02-01]
- FEDER funds
- Consejeria de Innovacion, Ciencia y Empresa de la Junta de Andalucia [FQM-274, P10-CVI-6226, P07-FQM-03056]
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The colloidal and biological properties of the two single-chain surfactants N-benzyl-N,N-dimethyl-N-(1-dodecyl)ammonium bromide (PH12) and N-cyclohexylmethyl-N,N-dimethyl-N-(1-dodecyl)ammonium bromide (CH12) and their two dimeric counterparts N,N'-(1,3-phenylenebis(methylene))bis(N,N-dimethyl-N-(1-dodecyl)ammonium dibromide (12PH12) and N,N'-(cyclohexane-1,3-diylbis(methylene))bis(N,N-dimethyl-N-(1-dodecyl)ammonium dibromide (12CH12) were investigated. The thermodynamic functions of the self-aggregation process were estimated by using calorimetric measurements and the micellization enthalpy values, Delta H-M, were examined considering the different enthalpic contributions to Delta H-M. In the investigation of the structure-property relationship, it was found that the surfactant structure does not influence practically the foamability of the surfactants, but it plays a key role in their solubilization capacity, antimicrobial activity and biodegradability. (C) 2013 Elsevier B.V. All rights reserved.
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