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Self-assembly of myristic acid in the presence of choline hydroxide: Effect of molar ratio and temperature

hal.structure.identifierUnité de recherche sur les Biopolymères, Interactions Assemblages [BIA]
dc.contributor.authorARNOULD, Audrey
hal.structure.identifierGrupo Biocoloides y nanotecnologías [GBN]
dc.contributor.authorPEREZ, Adrian
hal.structure.identifierUnité de recherche sur les Biopolymères, Interactions Assemblages [BIA]
dc.contributor.authorGAILLARD, Cédric
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorDOULIEZ, Jean-Paul
hal.structure.identifierLaboratoire Léon Brillouin [LLB - UMR 12]
dc.contributor.authorCOUSIN, Fabrice
hal.structure.identifierGrupo Biocoloides y nanotecnologías [GBN]
dc.contributor.authorSANTIAGO, Liliana
hal.structure.identifierTri ionique par les Systèmes Moléculaires auto-assemblés [LTSM]
dc.contributor.authorZEMB, Thomas
hal.structure.identifierUnité de recherche sur les Biopolymères, Interactions Assemblages [BIA]
dc.contributor.authorANTON, Marc
hal.structure.identifierUnité de recherche sur les Biopolymères, Interactions Assemblages [BIA]
dc.contributor.authorFAMEAU, Anne-Laure
dc.date.issued2015-05
dc.identifier.issn0021-9797
dc.description.abstractEnSalt-free catanionic systems based on fatty acids exhibit a broad polymorphism by simply tuning the molar ratio between the two components. For fatty acid combined with organic amino counter-ions, very few data are available on the phase behavior obtained as a function of the molar ratio between the counter-ion and the fatty acid. We investigated the choline hydroxide/myristic acid system by varying the molar ratio, R = ncholine hydroxide/nmyristic acid, and the temperature. Myristic acid ionization state was determined by coupling pH, conductivity and infra-red spectroscopy measurements. Self-assemblies were characterized by small angle neutron scattering and microscopy experiments. Self-assembly thermal behavior was investigated by differential scanning calorimetry, wide angle X-ray scattering and nuclear magnetic resonance. For R < 1, ionized and protonated myristic acid molecules coexisted leading to the formation of facetted self-assemblies and lamellar phases. The melting process between the gel and the fluid state of these bilayers induced a structural change from facetted or lamellar objects to spherical vesicles. For R > 1, myristic acid molecules were ionized and formed spherical micelles. Our study highlights that both R and temperature are two key parameters to finely control the self-assembly structure formed by myristic acid in the presence of choline hydroxide.
dc.language.isoen
dc.publisherElsevier
dc.subject.encatanionic
dc.subject.encounter-ion
dc.subject.enfatty acid
dc.subject.enmolar ratio
dc.subject.enself-assembly
dc.title.enSelf-assembly of myristic acid in the presence of choline hydroxide: Effect of molar ratio and temperature
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jcis.2015.01.008
dc.subject.halChimie
bordeaux.journalJournal of Colloid and Interface Science
bordeaux.page285-293
bordeaux.volume445
bordeaux.peerReviewedoui
hal.identifierhal-02118206
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02118206v1
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