The Properties of (PVA-CNTs) Nanocomposites

摘要

Nanocomposites are used in many industries such: solar cells, light emitting diodes, optoelectronic device, aircraft and cars. This paper is aimed to preparation of (PVA-CNTs) nanocomposites to using the new materials in many industries. Using the nanocomposites in these applications need to study the electrical, optical and mechanical properties which investigated in this paper. The samples of nanocomposites are prepared by using casting technique with different concentrations of carbon nanotubes. The optical properties of nanocomposites are measured in the wavelength range (200-800) nm. The results showed that the absorption coefficient, extinction coefficient, refractive index and real and imaginary dielectric constant of nanocomposites are increasing with increase the carbon nanotubes concentrations. The D.C electrical properties of (PVA-CNTs) nanocomposites are studied in the range of temperature (from 50 0 C to 80 0 C). The results found the electrical conductivity is increased with increasing the carbon nanotubes concentration and temperature. The activation energy is decrease with increasing the weight percentages of carbon nanotubes. Also, the mechanical properties of (PVA-CNTs) are investigated. Results showed that velocity of ultrasonic wave , specific acoustic impedance, bulk modulus and compressibility change with increase the concentration of carbon nanotubes.