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Hollow silica particles from microemulsion

dc.contributor.authorJafelicci, M.
dc.contributor.authorDavolos, Marian Rosaly [UNESP]
dc.contributor.authordos Santos, F. J.
dc.contributor.authorde Andrade, S. J.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:20:33Z
dc.date.available2014-05-20T15:20:33Z
dc.date.issued1999-05-01
dc.description.abstractSilica particles were obtained by addition of diluted soluble sodium silicate in sodium 1,2 bis (2-ethylhexyloxycarbonyl)-1-ethenesulfonate reverse microemulsions, in which aqueous phase was nitric acid solution and the water/surfactant ratio (W) was 5 or 10. Products, whether washed or not, were dried at 100 degrees C and suspended in different solvents: heptane, water, kerosene or pentane for making SEM measurements. Thermal treatments of washed silica samples were carried out at 900 degrees C and 1200 degrees C. Silica particles of sizes from 1 to 10 mu m were obtained at room temperature without changing their shape due to thermal treatment and crystallization. SEM micrographs show hollow particles suggesting that silica preferably polymerizes on microemulsion droplet interface where ionic strength of nitric acid aqueous solution is favourable for silica polymerization reaction. (C) 1999 Elsevier B.V. B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent98-102
dc.identifierhttp://dx.doi.org/10.1016/S0022-3093(99)00040-X
dc.identifier.citationJournal of Non-crystalline Solids. Amsterdam: Elsevier B.V., v. 247, p. 98-102, 1999.
dc.identifier.doi10.1016/S0022-3093(99)00040-X
dc.identifier.issn0022-3093
dc.identifier.lattes4284809342546287
dc.identifier.urihttp://hdl.handle.net/11449/31836
dc.identifier.wosWOS:000080506900018
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Non-Crystalline Solids
dc.relation.ispartofjcr2.488
dc.relation.ispartofsjr0,722
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleHollow silica particles from microemulsionen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes4284809342546287
unesp.author.orcid0000-0001-8326-1465[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt
unesp.departmentQuímica Inorgânica - IQARpt

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