Ethyl stearate: ethanol binary mixtures investigated by ultrafast OKE spectroscopy, optical microscopy, dynamic light scattering, and rheology

dc.creatorLoiola, PTC
dc.creatorDias, WD
dc.creatorSouza, MS
dc.creatorFerbonink, GF
dc.creatorZaniolo, MG
dc.creatorCerini, MF
dc.creatorAtvars, TDZ
dc.creatorNome, RA
dc.date2014
dc.dateAPR
dc.date2014-07-30T17:27:46Z
dc.date2015-11-26T16:43:00Z
dc.date2014-07-30T17:27:46Z
dc.date2015-11-26T16:43:00Z
dc.date.accessioned2018-03-28T23:27:50Z
dc.date.available2018-03-28T23:27:50Z
dc.identifierJournal Of Physical Organic Chemistry. Wiley-blackwell, v. 27, n. 4, n. 316, n. 321, 2014.
dc.identifier0894-3230
dc.identifier1099-1395
dc.identifierWOS:000333469800013
dc.identifier10.1002/poc.3248
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/65692
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/65692
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1273451
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionWe report an experimental study of ethyl stearate/ethanol binary mixtures employing optical microscopy, rheology, dynamic light scattering, and femtosecond optical Kerr effect spectroscopy. Optical microscopy images show that at 25 degrees C this mixture is homogeneous up to 10wt% ethyl stearate mass fraction and it leads to crystallization of ethyl stearate from solution at higher mass fractions. Rheological measurements at 40 degrees C and 25 degrees C exhibited an increase in viscosity of the binary mixture with increasing ethyl stearate mass fraction, consistent with molar mass considerations. Moreover, closer inspection of the rheology data from 0 to 10wt% ethyl stearate mass fraction indicate a plateau in the viscosity near 10%, thus indicating how crystallization affects the rheological properties of the solution, even at 40 degrees C. Dynamic light scattering data are consistent with two major components at all mass fractions investigated: a small ethyl stearate aggregate consisting of approximately seven monomers and a micron-sized crystallite. Femtosecond time-resolved optical Kerr effect indicates slower nuclear relaxation with increasing ethyl stearate mass fraction, thus suggesting that low-frequency motions of the binary mixture are involved in the early events of crystal nucleation. Copyright (c) 2013 John Wiley & Sons, Ltd.
dc.description27
dc.description4
dc.descriptionSI
dc.description316
dc.description321
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFAPESP [2011/12502-5, 2011/12531-5, 2012/01425-2, 2008/10593-0]
dc.languageen
dc.publisherWiley-blackwell
dc.publisherHoboken
dc.publisherEUA
dc.relationJournal Of Physical Organic Chemistry
dc.relationJ. Phys. Org. Chem.
dc.rightsfechado
dc.rightshttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dc.sourceWeb of Science
dc.subjectethyl stearate
dc.subjectnucleation
dc.subjectultrafast
dc.subjectMagnetic-resonance Investigations
dc.subjectMicelles
dc.titleEthyl stearate: ethanol binary mixtures investigated by ultrafast OKE spectroscopy, optical microscopy, dynamic light scattering, and rheology
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución