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Calcium polyphosphate coacervates: effects of thermal treatment

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dc.contributor.authorKopp, Willian
dc.contributor.authorBarud, Hernane S. [UNESP]
dc.contributor.authorPaz, Marcelo F.
dc.contributor.authorBueno, Luciano A.
dc.contributor.authorGiordano, Raquel L. C.
dc.contributor.authorRibeiro, Sidney José Lima [UNESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal da Grande Dourados (UFGD)
dc.contributor.institutionUniversidade Federal Rural de Pernambuco (UFRPE)
dc.date.accessioned2014-05-20T15:32:35Z
dc.date.available2014-05-20T15:32:35Z
dc.date.issued2012-08-01
dc.description.abstractThe addition of calcium chloride eletrolyte to sodium polyphosphate solutions lead to Calcium polyphosphate coacervates. The effects of a thermal treatment were investigated with the objective to increase the relative stability of the obtained material. Thermogravimetry analysis indicates that coacervates became less hydrophilic and more thermally stable after the thermal treatment. Crystallization was identified through differential scanning calorimetry and X-ray diffraction. Morphological changes were observed after the thermal treatment by scanning electron microscopy. N-2 adsorption-desorption isotherms suggest that both materials, thermally treated or not, display type IV isotherms, low superficial area and mesoporous structure. Stability experiments in solutions at different pH values show that the thermally treated calcium polyphosphate is relatively more stable than the non-treated coacervate.en
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar), Dept Engn Quim, BR-13565905 São Carlos, SP, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationFundação Univ Fed Grande Dourados, Fac Ciencias Biol & Ambientais, BR-79804970 Dourados, MS, Brazil
dc.description.affiliationUniversidade Federal Rural de Pernambuco (UFRPE), Dept Fis, BR-52171900 Recife, PE, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent219-223
dc.identifierhttp://dx.doi.org/10.1007/s10971-012-2749-z
dc.identifier.citationJournal of Sol-gel Science and Technology. Dordrecht: Springer, v. 63, n. 2, p. 219-223, 2012.
dc.identifier.doi10.1007/s10971-012-2749-z
dc.identifier.issn0928-0707
dc.identifier.lattes6446047463034654
dc.identifier.orcid0000-0003-3286-9440
dc.identifier.urihttp://hdl.handle.net/11449/41454
dc.identifier.wosWOS:000306846700004
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofJournal of Sol-Gel Science and Technology
dc.relation.ispartofjcr1.745
dc.relation.ispartofsjr0,477
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectCalcium polyphosphateen
dc.subjectPolyeletrolite coacervationen
dc.subjectPhosphate gelen
dc.subjectThermal treatmenten
dc.titleCalcium polyphosphate coacervates: effects of thermal treatmenten
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
dspace.entity.typePublication
unesp.author.lattes6446047463034654
unesp.author.orcid0000-0003-3286-9440[6]
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentQuímica Inorgânica - IQARpt

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Araraquara - IQAR - Instituto de Química