Development and characterization of PEEK/B_2O_3-cJopecl 45S5 bioactive glass composite coatings obtained by electrophoretic deposition

摘要

Three different glasses were synthesized by doping 45 S5 bioactive glass with B_2O_3. The bioactivityof the glasses was evaluated by immersion in simulated body fluid (SBF) up to 3 Days; all glassesshowed the precipitation of hydroxyapatite (HAp) after one day of soaking in SBF. Electrophoretic deposition (EPD) was used to prepare PEEK/B_2O_3-doped 45S5 glass composite coatings on stainless steel substrates. The coatings were characterized by means of tape test (ASTM D3359-B),scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), contactangle measurements, thermogravimetric analysis and in vitro bioactivity test. All composite coatings exhibited a porous and homogenous structure with a hydrophobic surface, according to the wettability test. The in vitro test in SBF demonstrated that the coatings were highly bioactive.