Influence of TiO₂ Incorporation on the Microstructure, Optical, and Dielectric Properties of TiO₂/Epoxy Composites

This study begins with a synthesis and characterization of Epoxy/TiO₂ composites (Ep–TiO₂–Cs) with different TiO₂ fillers. The ultrasonic mixing process was employed to disperse the TiO₂ fillers into the epoxy resin matrix. The effect of TiO₂ contents on microstructural, optical and electrical properties of the Ep–TiO₂–Cs have investigated. Several techniques are now being used to characterize the Ep–TiO₂–Cs. The microstructure of fracture surfaces was examined by SEM techniques. It revealed that the as-prepared TiO₂ particles are a spherical shape structure. At 5.0 wt% TiO₂ fillers, it is evident that these spheres are homogeneously distributed in the epoxy matrix. The XRD study confirms that the particle size generally decreases with increasing the added TiO₂ fillers in the epoxy matrix. In the UV-light range, the neat epoxy only blocks UV-light in the range of 200–280 nm, it becomes high UV-light blocker (up to 400 nm) via the addition of TiO₂ powder with 5.0 wt% fillers. Moreover, the TiO₂ content addition obviously enhanced the UV-Shielding efficiency of the epoxy resin.