The Thermal Signature Of Wormlike Micelles

dc.creatorIto
dc.creatorThiago Heiji; Clinckspoor
dc.creatorKarl Jan; de Souza
dc.creatorRenato Nunes; Sabadini
dc.creatorEdvaldo
dc.date2016-MAR
dc.date2016-06-07T13:16:51Z
dc.date2016-06-07T13:16:51Z
dc.date.accessioned2018-03-29T01:37:27Z
dc.date.available2018-03-29T01:37:27Z
dc.identifier
dc.identifierThe Thermal Signature Of Wormlike Micelles. Academic Press Ltd- Elsevier Science Ltd, v. 94, p. 61-66 MAR-2016.
dc.identifier0021-9614
dc.identifierWOS:000366850200008
dc.identifier10.1016/j.jct.2015.10.021
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0021961415003924#
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/242190
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1305888
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionThe variations in enthalpy (DfHWLM) and critical concentrations associated with the formation of wormlike micelles (WLMs) from combinations of tetradecyltrimethylammonium bromide (C(14)TAB) and various aromatic co-solutes were determined using isothermal titration calorimetry (ITC). Three groups of aromatic molecules were investigated: neutral (phenol), benzoate derivatives and cinnamate derivatives. In addition, the thermal stabilities of the WLMs (of hexadecyltrimethylammonium bromide, C(16)TAB) and the aromatic co-solutes of the three groups were investigated by measuring the temperatures at which the WLMs break and lose their ability to produce hydrodynamic drag reduction. A comparison of the results was used to establish correlations between the spontaneity of WLMs formation, their thermal stability and the molecular structure of the aromatic co-solutes. A characteristic thermal pattern with four steps was observed when WLMs are formed, that depended on the co-solute structure. Micellar growth was found to be an exothermic process, related to the fusion of the end caps allied with the incorporation of more co-solutes. The co-solutes that had negative charge and were able to maintain planar configuration demonstrated stronger interactions and also showed higher thermal stability through drag reduction. (C) 2015 Elsevier Ltd. All rights reserved.
dc.description94
dc.description
dc.description
dc.description61
dc.description66
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionBrazilian agency CENPES-PETROBRAS
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description
dc.description
dc.description
dc.languageen
dc.publisherACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
dc.publisher
dc.publisherLONDON
dc.relationJOURNAL OF CHEMICAL THERMODYNAMICS
dc.rightsembargo
dc.sourceWOS
dc.subjectViscoelastic Surfactant Solutions
dc.subjectLight-scattering Investigations
dc.subjectCetyltrimethylammonium Bromide
dc.subjectAlkylpyridinium Surfactants
dc.subjectGiant Micelles
dc.subjectSalicylate
dc.subjectTransition
dc.subjectCounterions
dc.subjectSystem
dc.titleThe Thermal Signature Of Wormlike Micelles
dc.typeArtículos de revistas


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