Síntese de cerâmicas bifásicas de fosfato de cálcio pelo método Pechini
Synthesis of calcium phosphate biphasic ceramics by Pechini method
José Rosa de Souza Farias, Geysivana Késsya Garcia Carvalho, Ycaro Breno Alves de Almeida, Josy Anteveli Osajima Furtini, Edson Cavalcanti Silva Filho, Aluska do Nascimento Simões Braga
Resumo
Os fosfatos de cálcio (CaP) são semelhantes com a parte inorgânica de uma matriz óssea, característica importante para um biomaterial. As fases de CaP mais amplamente utilizadas são a hidroxiapatita (HAp) e o beta fosfato tricálcico (β-TCP). A associação da biocerâmica HAp/β-TCP é uma alternativa promissora para uso na regeneração e enxertos ósseos. Assim, o objetivo deste trabalho foi sintetizar biocerâmicas de HAp/β-TCP via método Pechini, avaliando a influência de diferentes solventes na síntese. As caracterizações foram realizadas por difração de raios X (DRX), espectroscopia de infravermelho com transformada de Fourier (FTIR), análises termogravimétricas (TG/DTG) e microscopia eletrônica de varredura (MEV). Os resultados comprovaram que o método de síntese é eficiente na formação da cerâmica bifásica de HAp/β-TCP, independentemente do tipo de solvente utilizado, água ou álcool etílico, resultando na formação de nanopartículas agrupadas de aspecto morfológico poroso e formado por grãos irregulares.
Palavras-chave
Abstract
Calcium phosphates (CaP) are similar to the inorganic part of a bone matrix, an important characteristic for a biomaterial. The most widely used CaP phases are hydroxyapatite (HAp) and tricalcium beta phosphate (β-TCP). The combination of biochemistry HAp/β-TCP is a promising alternative for use in bone regeneration and grafting. Thus, the objective of this work was to synthesize HAp/β-TCP bioceramics via Pechini method, evaluating the influence of different solvents on synthesis. The characterizations were performed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, thermogravimetric analysis (TG/DTG) and scanning electron microscopy (SEM). The results proved that the synthesis method is efficient in the formation of biphasic ceramic of HAp/β-TCP, regardless of the type of solvent used, water or ethyl alcohol, resulting in the formation of grouped nanoparticles with a porous morphological aspect and forming irregular grains.
Keywords
References
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Submitted date:
04/26/2020
Accepted date:
10/17/2020
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