Nanostructured composite filament for Fused Deposition Modeling

Reference Presenter Authors
01-061 Julia Ce de Andrade Pinto Ce de Andrade Pinto, J.(Universidade Federal de Santa Catarina); Stares, S.L.(Universidade Federal de Santa Catarina); Nunes, W.D.(Universidade Federal de Santa Catarina); Hotza, D.(Universidade Federal de Santa Catarina); Paim, B.A.(FGM Produtos Odontológicos); Fredel, M.C.(Federal University of Santa Catarina); This study aims the development of polylactic acid - nanostructured hydroxyapatite (PLA/HA) composites to manufacture a filament to be used in Fused Deposition Modeling (FDM) in order to produce porous structures for use in Bone Tissue Engineering (BTE). Samples with 0, 10 and 20 wt% (PLA/HA) were produced and characterized by Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC ) and mechanical tests for measuring tensile strength and Young’s modulus. The results of mechanical tests showed that the addition of hydroxyapatite resulted in the reduction of mechanical properties. DSC results showed that the presence of the ceramic phase does not influence the glass transition temperature (Tg) and the degree of crystallinity of the PLA, which remains substantially amorphous, and consequently preserves the PLA degradability rate, as already noted in the literature. We conclude from the properties studied in this work that it is possible to use PLA/HA nanocomposites in order to produce porous structures for use in BTE.
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