Characterization of the nanomorphology of polymer-silica colloidal nanocomposites using electron spectroscopy imaging

dc.creatorAmalvy, JI
dc.creatorPercy, MJ
dc.creatorArmes, SP
dc.creatorLeite, CAP
dc.creatorGalembeck, F
dc.date2005
dc.dateFEB 15
dc.date2014-11-18T12:34:31Z
dc.date2015-11-26T17:50:12Z
dc.date2014-11-18T12:34:31Z
dc.date2015-11-26T17:50:12Z
dc.date.accessioned2018-03-29T00:33:23Z
dc.date.available2018-03-29T00:33:23Z
dc.identifierLangmuir. Amer Chemical Soc, v. 21, n. 4, n. 1175, n. 1179, 2005.
dc.identifier0743-7463
dc.identifierWOS:000226962100009
dc.identifier10.1021/la047535g
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/62909
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/62909
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/62909
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1289610
dc.descriptionThe internal nanomorphologies of two types of vinyl polymer-silica colloidal nanocomposites were assessed using electron spectroscopy imaging (ESI). This technique enables the spatial location and concentration of the ultrafine silica sol within the nanocomposite particles to be determined. The ESI data confirmed that the ultrafine silica sol was distributed uniformly throughout the poly(4-vinylpyridine)/silica nanocomposite particles, which is consistent with the "currant bun" morphology previously used to describe this system. In contrast, the polystyrene/silica particles had a pronounced "core-shell" morphology, with the silica sol forming a well-defined monolayer surrounding the nanocomposite cores. Thus these ESI results provide direct verification of the two types of nanocomposite morphologies that were previously only inferred on the basis of X-ray photoelectron spectroscopy and aqueous electrophoresis studies. Moreover, ESI also allows the unambiguous identification of a minor population of polystyrene/silica nanocomposite particles that are not encapsulated by silica shells. The existence of this second morphology was hitherto unsuspected, but it is understandable given the conditions employed to synthesize these nanocomposites. It appears that ESI is a powerful technique for the characterization of colloidal nanocomposite particles.
dc.description21
dc.description4
dc.description1175
dc.description1179
dc.languageen
dc.publisherAmer Chemical Soc
dc.publisherWashington
dc.publisherEUA
dc.relationLangmuir
dc.relationLangmuir
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectEmulsion Polymerization
dc.subjectLatex-particles
dc.subjectDispersion Polymerization
dc.subjectInorganic Particles
dc.subjectComposite-particles
dc.subjectPolar Media
dc.subjectPolystyrene
dc.subjectNanoparticles
dc.subjectEncapsulation
dc.titleCharacterization of the nanomorphology of polymer-silica colloidal nanocomposites using electron spectroscopy imaging
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución