Autor(es): Castro, António ; Almeida, José Carlos ; Salvado, Isabel Miranda ; Margaça, Fernanda ; Fernandes, Maria Helena
Data: 2012
Identificador Persistente: http://hdl.handle.net/10773/9380
Origem: RIA - Repositório Institucional da Universidade de Aveiro
Assunto(s): Sol-gel preparation; Biomaterials; Electron Microscopy; Microstructure; FTIR
The preparation of PDMS–TEOS–CaO hybrid materials by sol–gel techniques has been widely described in previous works. Calcium nitrate is the most common source of calcium used in these preparations. However, to remove possible toxic nitrate by-products a thermal treatment is necessary at temperatures above 500 1C, which leads to the degradation of the polymeric components of the hybrids. Strontium has already shown some promising results in the therapeutic area, being used in cases of osteoporosis and low bone density. In this study a new potential bioactive hybrid material was prepared, by sol–gel techniques, using calcium acetate as a novel calcium source. Also, for the first time, incorporation of strontium in a PDMS–TEOS hybrid system was evaluated. Samples were characterized before and after immersion in Kokubo’s Simulated Body Fluid (SBF) by SEM, EDS, ICP and FT-IR spectroscopy.
