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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/69532
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dc.contributor.authorAlmgren, Mats-
dc.contributor.authorBorné, Johanna-
dc.contributor.authorFeitosa, Eloi-
dc.contributor.authorKhan, Ali-
dc.contributor.authorLindman, Björn-
dc.date.accessioned2014-05-27T11:22:24Z-
dc.date.accessioned2016-10-25T18:23:35Z-
dc.date.available2014-05-27T11:22:24Z-
dc.date.available2016-10-25T18:23:35Z-
dc.date.issued2007-02-27-
dc.identifierhttp://dx.doi.org/10.1021/la062482j-
dc.identifier.citationLangmuir, v. 23, n. 5, p. 2768-2777, 2007.-
dc.identifier.issn0743-7463-
dc.identifier.urihttp://hdl.handle.net/11449/69532-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/69532-
dc.description.abstractAqueous dispersions of monoolein (MO) with a commercial hydrophobically modified ethyl hydroxyethyl cellulose ether (HMEHEC) have been investigated with respect to the morphologies of the liquid crystalline nanoparticles. Only very low proportions of HMEHEC are accepted in the cubic and lamellar phases of the monoolein-water system. Due to the broad variation of composition and size of the commercial polymer, no other single-phase regions were found in the quasi-ternary system. Interactions of MO with different fractions of the HMEHEC sample induced the formation of lamellar and reversed hexagonal phases, identified from SAXD, polarization microscopy, and cryogenic TEM examinations. In excess water (more than 90 wt %) coarse dispersions are formed more or less spontaneously, containing particles of cubic phase from a size visible by the naked eye to small particles observed by cryoTEM. At high polymer/MO ratios, vesicles were frequently observed, often oligo-lamellar with inter-lamellar connections. After homogenization of the coarse dispersions in a microfluidizer, the large particles disappeared, apparently replaced by smaller cubic particles, often with vesicular attachments on the surfaces, and by vesicles or vesicular particles with a disordered interior. At the largest polymer contents no proper cubic particles were found directly after homogenization but mainly single-walled defected vesicles with a peculiar edgy appearance. During storage for 2 weeks, the dispersed particles changed toward more well-shaped cubic particles, even in dispersions with the highest polymer contents. In some of the samples with low polymer/MO ratio, dispersed particles of the reversed hexagonal type were found. A few of the homogenized samples were freeze-dried and rehydrated. Particles of essentially the same types, but with a less well-developed cubic character, were found after this treatment. © 2007 American Chemical Society.en
dc.format.extent2768-2777-
dc.language.isoeng-
dc.sourceScopus-
dc.subjectDispersed particles-
dc.subjectPolymer/MO ratio-
dc.subjectSingle-walled defected vesicles-
dc.subjectCellulose-
dc.subjectHydrophobicity-
dc.subjectLamellar structures-
dc.subjectTransmission electron microscopy-
dc.subjectLiquid crystal polymers-
dc.subjectacylglycerol-
dc.subjectcellulose-
dc.subjectdrug derivative-
dc.subjectethyl 2 hydroxyethylcellulose-
dc.subjectethyl-2-hydroxyethylcellulose-
dc.subjectglycerol oleate-
dc.subjectpolymer-
dc.subjectunclassified drug-
dc.subjectwater-
dc.subjectchemical model-
dc.subjectchemistry-
dc.subjectconformation-
dc.subjectcryoelectron microscopy-
dc.subjectcrystallization-
dc.subjectliquid crystal-
dc.subjectmethodology-
dc.subjectparticle size-
dc.subjectphysical chemistry-
dc.subjecttemperature-
dc.subjecttransmission electron microscopy-
dc.subjectChemistry, Physical-
dc.subjectCryoelectron Microscopy-
dc.subjectCrystallization-
dc.subjectGlycerides-
dc.subjectLiquid Crystals-
dc.subjectMicroscopy, Electron, Transmission-
dc.subjectModels, Chemical-
dc.subjectMolecular Conformation-
dc.subjectParticle Size-
dc.subjectPolymers-
dc.subjectTemperature-
dc.subjectWater-
dc.subjectTransmission Electron Microscopy-
dc.subjectWater Repellence-
dc.titleDispersed lipid liquid crystalline phases stabilized by a hydrophobically modified celluloseen
dc.typeoutro-
dc.contributor.institutionUppsala University-
dc.contributor.institutionLund University-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationDepartment of Physical and Analytical Chemistry Uppsala University, P.O. Box 579, SE-751 23 Uppsala-
dc.description.affiliationPhysical Chemistry 1 Lund University Center for Chemistry and Chemical Engineering Lund University, P.O. Box 124, SE-221 00 Lund-
dc.description.affiliationPhysics Department Sao Paulo State University, Sao Jose do Rio Preto, Sao Paulo-
dc.description.affiliationUnespPhysics Department Sao Paulo State University, Sao Jose do Rio Preto, Sao Paulo-
dc.identifier.doi10.1021/la062482j-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofLangmuir-
dc.identifier.scopus2-s2.0-33847727537-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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