Novel of Biodegradable Polymers-Inorganic Nanoparticles: Structural, Optical and Electrical Properties as Humidity Sensors and Gamma Radiation Shielding for Biological Applications

摘要

In this paper, novel of (polyvinyl alcohol-starch-yttrium oxide nanoparticles) nanocomposites and studying their structural, optical and electrical properties for humidity sensors and gamma radiation shielding applications has been investigated with low cost. The (PVA-ST) blend wasprepared with weight percentage: polyvinyl alcohol (85 wt.%) and starch (15 wt.%). The effect of Y_(2)O_(3) nanoparticles concentrations on the structural, optical and D.C electrical of (PVA-ST) blend has been studied for humidity sensors and gamma ray shielding applicationswith low cost and lightweight. The experimental results of optical properties for (PVA-ST-Y_(2)O_(3)) nanocomposites showed that the absorbance, absorption coefficient, extinction coefficient, refractive index and optical conductivity of (PVA-ST) blend were increased with increasethe Y_(2)O_(3) nanoparticles concentrations. The transmittance and energy band gap were decreased with increase the Y_(2)O_(3) nanoparticles concentrations. The D.C electrical properties of (PVA-ST-Y_(2)O_(3)) nanocomposites were measured atroom temperature. The results showed that the electrical conductivity of (PVA-ST) blend increases with increasing the Y_(2)O_(3) nanoparticles concentrations. The results of applications showed that the (PVA-ST-Y_(2)O_(3)) nanocomposites have high sensitivityfor relative humidity. The nanocomposites have high of attenuation coefficient for different sources of gamma radiation.