Synthesis and Evaluation Structural, Thermal and Electrical Properties for PCL/TiO₂ Nanocomposites

The nanofibrous based on the polymer that was associated with PCL, doped with different ratios of titanium dioxide (TiO₂) nanopowder were successfully synthesized using the electrospun method at RT and voltage (16 kV). The products were studied using SEM, AFM, FT-IR, XRD, DSC, TG and the D.C electrical characteristics. The result of SEM analysis showed that the polymer and doped samples produce a random distribution of fine fibers at an average diameter range (95, 163 and 110 ) nm with a smooth surface their identification through AFM. The small capacity of the carbonyl group to operate as a powerful electron donor for interacting with TiO₂ cation is shown by the fact that the FTIR signal strength decreases with increasing dopant concentration, indicating an increase in the basicity of the major functional groups. XRD analysis confirmed the existence of seme-crystalline TiO₂ with PCL fibres aggregates moreover, the results of differential thermometry scanning (DSC) showed that the addition of TiO₂ nanoparticles affected the crystallization of PCL polymer, which supports the results of FTIR spectroscopy and absorption analysis with the presence of interaction between nanoparticles and pure PCL chains. Further, master the measurement of thermal weight (TG). The results displayed that the D.C electrical conductivity of nanofibers increases with increasing the (TiO₂) nanoparticles contents and temperatures, the (PLC/TiO₂) nanofibers’ thermal activation energy values range from (2.258 eV to 1.2726 eV).