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Clouding in fatty acid dispersions for charge-dependent dye extraction

hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorGARENNE, David
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorNAVAILLES, Laurence
hal.structure.identifierCentre de Recherche Paul Pascal [CRPP]
dc.contributor.authorNALLET, Frédéric
hal.structure.identifierChimie et Biologie des Membranes et des Nanoobjets [CBMN]
dc.contributor.authorGRÉLARD, Axelle
hal.structure.identifierChimie et Biologie des Membranes et des Nanoobjets [CBMN]
dc.contributor.authorDUFOURC, Erick J.
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorDOULIEZ, Jean-Paul
dc.date.issued2016-01-22
dc.identifier.issn0021-9797
dc.description.abstractEnThe clouding phenomenon in non-ionic surfactant systems is a common feature that remains rare for ionic detergents. Here, we show that fatty acid (negatively charged) systems cloud upon cooling hot dispersions depending on the concentration or when adding excess guanidine hydrochloride. The clouding of these solutions yields the formation of enriched fatty acid droplets in which they exhibit a polymorphism that depends on the temperature: upon cooling, elongated wormlike micelles transit to rigid stacked bilayers inside droplets. Above this transition temperature, droplets coalesce yielding a phase separation between a fatty acid-rich phase and water, allowing extraction of dyes depending on their charge and lipophilicity.Positively charged and zwitterionic dyes were sequestered within the droplets (and then in the fatty acidrich upper phase) whereas the negatively charged ones were found in both phases. Our results show an additional case of negatively charged surfactant which exhibit clouding phenomenon and suggest that these systems could be used for extracting solutes depending on their charge and lipophilicity.
dc.language.isoen
dc.publisherElsevier
dc.subject.enSurfactant clouding
dc.subject.enFatty acid
dc.subject.enSelf-assembly
dc.subject.enCompartments
dc.subject.enDye sequestration
dc.title.enClouding in fatty acid dispersions for charge-dependent dye extraction
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jcis.2016.01.049
dc.subject.halChimie/Chimie théorique et/ou physique
bordeaux.journalJournal of Colloid and Interface Science
bordeaux.pagepp. 95-102
bordeaux.volume468
bordeaux.peerReviewedoui
hal.identifierhal-01348994
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01348994v1
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