Abstract
Poly(3hydroxybutyrate)(P(3HB))/Bioglass® composites incorporating multiwalled carbon nanotubes (MWCNTs) have been successfullyprepared by the solvent casting technique. The microstructure, electrical properties andbioactivity of the composites were characterized using scanning electron microscopy, x-raydiffraction and current–voltage measurements. Different concentrations of MWCNTs wereused to determine their effect on the electrical properties of the composites. MWCNTs andBioglass® particles were found to be homogeneously dispersed throughout the P(3HB) matrix. Theelectrical resistance of the composite samples decreased on increasing the MWCNTconcentration, as expected. An in vitro degradation study in simulated body fluid (SBF)was carried out on composite samples. The formation of hydroxyapatite on the surfaces ofP(3HB)/Bioglass®/MWCNT composite films was confirmed after two months of immersion in SBF. This hydroxyapatite layerwas not formed on the neat polymeric films and on composites containing MWCNTs only (withoutBioglass®). It was found that the presence of MWCNTs did not hinder the bioactivity of theBioglass® particles, as confirmed by SEM and XRD studies on composite samples.
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