Vigilancia Tecnológica

The goal of this study is to manufacture quaternary nanocomposites from a mixture of two polymers, polyvinyl alcohol (PVA) and polyethylene glycol (PEG), with two nanomaterials, cobalt trioxide (Co2O3) and silicon dioxide (SiO2) nanoparticles, by casting and forming films with different weight ratios ( 2, 4,6 and 8) w.t.%. Which consider these nanocomposites promising for many modern applications, such as nanodevices and pressure sensors, have a distinct physical and chemical nature. Scanning electron microscopy (SEM) reveals the appearance of aggregates and agglomerates randomly distributed on the upper surface of (PVA-PEG-SiO2-Co2O3) nanocomposite films when reach a weight percentage of 8%. Using an optical microscope, the images indicate the formation of an interconnected network within the polymer matrix of (SiO2-Co2O3) nanoparticles, compared to the pure film (PVA-PEG). Fourier transform infrared (FTIR) also showed the creep of the peak location and changes in the peak shape and intensity. The electrical properties of alternating current indicated that the dielectric loss and dielectric constant decrease with increasing frequency of the applied electric field and, at the same time, increase with increasing concentration of NPs. When they reaching a concentration of 8% by weight in (SiO2-Co2O3) NPs and at a frequency of f?=?100 Hz, the dielectric constant and A.C. electrical conductivity of the (PVA-PEG) mixture augment by about 100% and 60%, respectively. The results we obtained from the study indicate that combining nanoparticles (SiO2-Co2O3) with (PVA-PEG) leads to improving the electrical and structural properties. The outcomes of the pressure sensor deployment show that, in comparison to other sensors, the (PVA-PEG-SiO2-Co2O3) nanostructures have better ecological durability, extraordinary flexibility, and exceptional pressure sensitivity.