A survey on the phase diagram of the system sodium dodecyl sulphate/1-decanol/D2O concerning an eventual coexistence of uniaxial nematic phases

dc.authorid0000-0002-6339-8699en_US
dc.authorid0000-0002-6339-8699en_US
dc.authorid0000-0002-9854-5177en_US
dc.authorid0000-0002-2422-2260en_US
dc.contributor.authorOliveira-Filho, Arnaldo G.
dc.contributor.authorAkpınar, Erol
dc.contributor.authorReis, Dennys
dc.contributor.authorFigueiredo Neto, A. M.
dc.date.accessioned2021-06-23T19:50:19Z
dc.date.available2021-06-23T19:50:19Z
dc.date.issued2018
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Kimya Bölümüen_US
dc.description.abstractWe examine an eventual coexistence of discotic () and calamitic () nematic uniaxial phases in the sodium dodecyl sulphate (SDS)/1-decanol (DeOH)/D2O mixture phase diagram. This coexistence is claimed in some previous works. Four different molar ratios [D2O]/[SDS] were investigated, where the square brackets represents the molar concentration of the compound, and 33, with temperatures ranging from 20 degrees C up to about 52 degrees C. The experimental techniques employed for phase identification were laser conoscopy, polarised optical microscopy and small-angle X-ray scattering. In the investigated surface of the phase diagram, no such nematic phases coexistence region was found. The discotic () and biaxial () nematic phases were identified in some regions of the phase diagram. Coexistence domains of the nematic ND/lamellar, and lamellar/micellar isotropic were identified. Our results agree with the theoretical predictions and symmetry arguments that consider the nematic/nematic phase transitions of second order, well described by a mean-field Landau-type model, preventing the nematic/nematic coexistence domains. Moreover, these results are consistent with all the experimental results we encountered in more than 30 different lyotropic mixtures investigated by using complementary experimental techniques to univocally identify the mesophases and phase-coexistence regions. [Graphics] .en_US
dc.identifier.doi10.1080/02678292.2017.1347292
dc.identifier.endpage484en_US
dc.identifier.issn0267-8292
dc.identifier.issn1366-5855
dc.identifier.issue4en_US
dc.identifier.scopus2-s2.0-85021842198en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage475en_US
dc.identifier.urihttps://doi.org/10.1080/02678292.2017.1347292
dc.identifier.urihttps://hdl.handle.net/20.500.12491/9756
dc.identifier.volume45en_US
dc.identifier.wosWOS:000428303800001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorAkpınar, Erol
dc.language.isoenen_US
dc.publisherTaylor & Francis Ltden_US
dc.relation.ispartofLiquid Crystalsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectLyotropic Liquid Crystalen_US
dc.subjectBiaxial Nematic Phaseen_US
dc.subjectPhase Coexistenceen_US
dc.subjectConoscopyen_US
dc.subjectOptical Microscopyen_US
dc.subjectSmall Angle X-ray Scatteringen_US
dc.titleA survey on the phase diagram of the system sodium dodecyl sulphate/1-decanol/D2O concerning an eventual coexistence of uniaxial nematic phasesen_US
dc.typeArticleen_US

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