Characterization of sodium alginate containing bioactive glass coatings prepared by sol–gel processing

Abstract

In this study, bioactive glass material containing sodium alginate was coated on the surface of Ti6Al4V alloy by the sol–gel method, and its bioactive property was investigated. The aim of the study is to make the surface of Ti6Al4V alloy bioactive with the help of the coating layer. For this purpose, polymeric coating functional new material with bioactive glass layer was formed. Combination of triethyl phosphate tetraethoxysilane, and calcium nitrate was used as phosphate, silica, and calcium sources to form the sol structure. Also, by adding polyvinylpyrrolidone to the bioactive glass coating solution, the rheological properties of the solution were optimized, which is an important factor in the formation of a homogeneous coating surface. Bioactive glasses were coated on the Ti6Al4V surface and then heat treatment was applied to the samples at the optimum temperature of 200 °C for half an hour. The X-ray diffraction (XRD) and Fourier transform infrared (FTIR) devices were used to identify the phases formed and detect the functional groups. The energy-dispersive X-ray spectroscopy, XRD, and FTIR analysis methods were used to determine the in vitro bioactive property of the heat-treated samples at 200 °C before and after contact with simulated body fluid. The transmission electron microscope, differential scanning calorimetry, and simultaneous thermal analysis methods were also used to characterize the coating materials. Providing the desired bioactivity together with the lower heat treatment temperature has added superiority to the formed original coatings.