Collagen-hydroxyapatite films: piezoelectric properties

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dc.contributor.authorSilva, C. C.
dc.contributor.authorThomazini, D.
dc.contributor.authorPinheiro, A. G.
dc.contributor.authorAranha, N. [UNESP]
dc.contributor.authorFigueiro, S. D.
dc.contributor.authorGoes, J. C.
dc.contributor.authorSombra, A. S. B.
dc.contributor.institutionUniversidade Federal do Ceará (UFC)
dc.contributor.institutionUniversidade de Fortaleza (UNIFOR)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:26:51Z
dc.date.available2014-05-20T15:26:51Z
dc.date.issued2001-10-03
dc.description.abstractIn this paper we report a study of the physicochemical, dielectric and piezoelectric properties of anionic collagen and collagen-hydroxyapatite (HA) composites, considering the development of new biomaterials which have potential applications in support for cellular growth and in systems for bone regeneration. The piezoelectric strain tensor element d(14), the elastic constant s(55) and the dielectric permittivity 8(11), were measured for the anionic collagen and collagen-HA films. The thermal analysis shows that the denaturation endotherm is at 59.47 degreesC for the collagen sample. The collagen-HA composite film shows two transitions, at 48.9 and 80.65 degreesC. The X-ray diffraction pattern of the collagen film shows a broad band characteristic of an amorphous material. The main peaks associated to the crystalline HA is present in the sample of collagen-HA. In the collagen-HA composite, one can also notice the presence of other peaks with low intensities which is an indication of the formation of other crystalline phases of apatite. The scanning electron photomicrograph of anionic collagen membranes shows very thin bundles of collagen. The scanning electron photomicrography of collagen-HA film also show deposits of hydroxyapatite on the collagen fibers forming larger bundles and suggesting that a collagenous structure of reconstituted collagen fibers could act as nucleators for the formation of apatite crystal similar to those of bone. The piezoelectric strain tensor element d(14) was measured for the anionic collagen, with a value of 0.062 pC N-1, which is in good agreement compared with values reported in the literature obtained with other techniques. For the collagen-HA composite membranes, a slight decrease of the value of the piezoelectricity (0.041 pC N-1) was observed. The anionic collagen membranes present the highest density, dielectric permittivity and lowest frequency constant f.L. (C) 2001 Elsevier B.V. B.V. All rights reserved.en
dc.description.affiliationUniv Fed Ceara, LONLCM, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil
dc.description.affiliationUFC, Dept Quim Organ & Inorgan, Fortaleza, Ceara, Brazil
dc.description.affiliationUNESP, Inst Quim
dc.description.affiliationUNIFOR, Ctr Ciências Tecnol, LNM, Fortaleza, CE, Brazil
dc.description.affiliationUFC, Ctr Ciências, Dept Bioquim & Biol Mol, Fortaleza, Ceara, Brazil
dc.description.affiliationUFC, Ctr Tecnol, Dept Engn Mech, Fortaleza, Ceara, Brazil
dc.description.affiliationUnespUNESP, Inst Quim
dc.format.extent210-218
dc.identifierhttp://dx.doi.org/10.1016/S0921-5107(01)00674-2
dc.identifier.citationMaterials Science and Engineering B-solid State Materials For Advanced Technology. Lausanne: Elsevier B.V. Sa, v. 86, n. 3, p. 210-218, 2001.
dc.identifier.doi10.1016/S0921-5107(01)00674-2
dc.identifier.issn0921-5107
dc.identifier.urihttp://hdl.handle.net/11449/36929
dc.identifier.wosWOS:000170968100006
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofMaterials Science and Engineering B-solid State Materials For Advanced Technology
dc.relation.ispartofjcr3.316
dc.relation.ispartofsjr0,779
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectcollagen-hydroxyapatitept
dc.subjectfilmspt
dc.subjectpiezoelectric propertiespt
dc.titleCollagen-hydroxyapatite films: piezoelectric propertiesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.orcid0000-0002-6324-7647[6]
unesp.author.orcid0000-0003-1954-377X[4]
unesp.author.orcid0000-0001-5457-6484[3]

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