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Apatite formation on calcined kaolin-white Portland cement geopolymer

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Resumo:In this study, calcined kaolin–white Portland cement geopolymerwas investigated for use as biomaterial. Sodiumhydroxide and sodium silicate were used as activators. In vitro test was performed with simulated body fluid (SBF) for bioactivity characterization. The formation of hydroxyapatite bio-layer on the 28-day soaked samples surface was tested using SEM, EDS and XRD analyses. The results showed that the morphology of hydroxyapatite was affected by the source material composition, alkali concentration and curing temperature. The calcined kaolin–white Portland cement geopolymer with relatively high compressive strength could be fabricated for use as biomaterial. The mix with 50% white Portland cement and 50% calcined kaolin had 28-day compressive strength of 59.0 MPa and the hydroxyapatite bio-layer on the 28-day soaked sample surface was clearly evident.
Autores principais:Pangdaeng, S.
Outros Autores:Sata, V.; Aguiar, J. L. Barroso de; Pacheco-Torgal, F.; Chindaprasirt, P.
Assunto:Geopolymers Hydroxyapatite Bio-layer Bioactivity Geopolymer Apatite Simulated body fluid Kaolin White Portland cement
Ano:2015
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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