Vigilancia Tecnológica

The objective of this study is to improve the electrical properties of nanostructures made of polyvinyl alcohol (PVA), silicon carbide (SiC), and cerium dioxide (CeO2) so that they may be used in electronic nanodevices and flexible pressure sensors. Using a casting procedure, PVA/CeO2/SiC films containing 0, 2, 4, 6, and 8 wt% CeO2/SiC nanoparticles were produced. When the weight% of (PVA/CeO2/SiC) nancomposites (NCs) films reaches 8%, field emission scan electron microscope (FE-SEM) investigation reveals cohesive aggregates or fragments that are randomly spread on the top surface. Unlike the pure (PVA) film, optical microscopy (OM) has shown that the (CeO2/SiC) nanoparticles (NPs) form a network inside the polymer matrix. The FTIR study showed that the physical interaction between polymer matrix (PVA) and CeO2/SiC nanoparticles. Analyses of the dielectric properties of PVA/CeO2/SiC nanocomposites showed that, as frequency increased, both the dielectric constant and the dielectric loss decreased, while its increase when the ratio of (CeO2/SiC)NPs increases. When the frequency and ratio of (CeO2/SiC) NPs in (PVA/CeO2/SiC) nanocomposites increase, the A.C electrical conductivity also increases. Results showed that the dielectric characteristics of PVA/CeO2/SiC films improved with increasing pressure, suggesting that these nanostructures might be promising as pressure sensors. The outcomes of the pressure sensor’s application show that the (PVA/CeO2/SiC) nanostructures outperform competing sensors in terms of pressure sensitivity, flexibility, and environmental durability.