article · Polymer Engineering and Science
Titanium oxide nanoparticles synthesised by a sol-gel method were incorporated into a blend of polyvinyl chloride and polymethyl methacrylate to produce nanocomposite films using solution casting. The nanoparticles possessed a tetragonal anatase phase with an average grain size of 15.7 nanometres. Incorporating these nanoparticles reduced the overall crystallinity of the polymer blend films and altered their structural interactions. Optical testing revealed that both direct and indirect allowed optical bandgaps decreased as the concentration of titanium oxide nanoparticles increased. Room-temperature electrical measurements showed that alternating current electrical conductivity followed Jonscher's law due to the formation of a percolating network within the composite. Furthermore, increasing the nanoparticle content raised both the dielectric constant and dielectric loss of the materials. These combined optical and dielectric shifts suggest potential utility in capacitive energy storage and optoelectronic devices.
Modifying everyday plastics with nanoscale particles can yield lightweight, flexible materials with adjustable electrical and optical properties. By altering how light passes through the film and how it stores electrical charge, these blended nanocomposites offer a foundation for developing versatile components for modern electronics, including energy storage units and flexible displays, without relying on purely rigid, conventional materials.
The abstract identifies capacitive energy storage and optoelectronic devices, such as flexible displays or circuits, as potential applications. Target users would be manufacturers and developers of flexible electronics and dielectric components. As the study reports laboratory-scale fabrication via solution casting alongside fundamental material characterisation, the technology is at an early research stage, requiring further device integration and scaled manufacturing trials before commercial deployment.
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Abstract In the present work, sol–gel‐synthesized titanium oxide nanoparticles (TiO 2 NPs) were added to polyvinyl chloride (PVC) and polymethyl methacrylate (PMMA) to create polymer nanocomposites (PNCs) samples. The preparation was carried out via the solution casting method. The synthesized TiO 2 NPs have a tetragonal anatase phase and an average grain size of 15.7 nm. XRD analysis reveals that the TiO 2 NPs' addition to PVC/PMMA causes a decrease in the crystallinity of PNCs films. Infrared Fourier analysis demonstrated the interplay/complexity between the PVC/PMMA blend and TiO 2 NPs. The UV/visible spectrum of the PVC/PMMA blend showed two absorbance peaks at 278 and 208 nm, which may result from the n → π* and π → π* transitions. Also, optical bandgaps for indirect and direct allowed transitions decreased with increasing TiO 2 NPs concentration. The samples' AC electrical conductivity and dielectric properties were measured at room temperature. As the TiO 2 NPs content in the nanocomposite rises, a percolating network begins to emerge inside the composite, demonstrating that AC electrical conductivity obeys Jonscher's law. Additionally, it has been demonstrated that nanoparticle concentration leads to a higher composite dielectric loss and dielectric constant. These findings suggest the possibility of using the prepared nanocomposites in capacitive energy storage and optoelectronic devices. Highlights PVC/PMMA‐TiO 2 nanocomposites' films were fabricated via the solution casting method. Adding TiO 2 NPs to PVC/PMMA reduces the crystallinity of the PNCs films. The allowed direct and indirect bandgaps decreased with rising TiO 2 NPs content. AC conductivity, impedance, and dielectric characteristics were discussed. The findings indicate the use of prepared samples in optoelectronic devices.
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DOI: 10.1002/pen.26476
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