resumo
A new type of material from polyamide coated with calcium phosphate was developed aiming to have potential application as biomaterial. Coating was obtained by the sol-gel method and calcium phosphate was obtained after contact with body fluid solution. The coated polyamide (before and after contact with body fluid solution) was characterized by thermogravimetric and differential thermal (TGA/DTA) analyses, differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). These characterizations revealed that the calcium phosphate coating has a thickness of less than 3 mu m, which resulted in an increase in the melting point and improved the thermal stability of polyamide. After contact with body fluid, the interactions between the coating and the substrate remained, and there was formation of crystalline and amorphous phosphates on polyamide surface.
palavras-chave
IN-VITRO; APATITE; FILMS; GLASS; BIOCOMPATIBILITY; BIOCOMPOSITES; COMPOSITE
categoria
Chemistry
autores
Bandeira, LC; Ciuffi, KJ; Calefi, PS; Nassar, EJ; Silva, JVL; Oliveira, M; Maia, IA; Salvado, IM; Fernandes, MHV
nossos autores
agradecimentos
The authors acknowledge Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP), Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) and Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) (Brazilian research funding agencies) for supporting this work.