Synthesis and characterization of Cd _xZn _(1 -x)O nanoparticles-doped aryl poly ether ether ketone for novel application potentials

摘要

The influence of polymer on the structure, optical, electrical, and thermal properties of nanoscale fillers is a crucial clue to introduce these novel nanocomposites to service life applications. In the present work, different compositions of cadmium-doped zinc oxide (Cd _xZn _(1 -x)O) nanopowders, x = 0.1, 0.3, and 0.5, with a uniform particle size of around 8 nm have been synthesized. A fixed amount, 1 wt %, of the prepared nanopowders was blended with aryl poly ether ether ketone (PEEK) by solution mixing to prepare PEEK/Cd xZn 1-xO nanocomposite films. The structure and morphology of Cd _xZn _(1 -x)O nanopowders and PEEK/Cd _xZn _(1 -x)O nanocomposite films have been characterized using transmission electron microscopy and X-ray diffraction. The results showed that the particle size of nanoscale filler decreases from 10 nm to 5-7 nm when mixed with PEEK and these nanocomposites have amorphous structure. The thermogravitational analysis results show that a small amount of Cd _xZn _(1 -x)O nanopowders (1 wt %) without surface modification can greatly improve the thermal stability of PEEK. The UV-vis spectra showed that there is absorption peak at 284 nm due to interband π-π* electronic transition. This absorption peak gets shifted toward the longer wavelength region as the concentration of cadmium ions increase in the PEEK matrix. This red shift results in a decrease of the band energy gap. The electrical conductivity of PEEK/Cd _xZn _(1 -x)O nanocomposite films was increased as the cadmium ion increases. The results showed that PEEK/Cd _xZn _(1 -x)O nanocomposite films can be used in thermostat and/or fire alarm devices.