Novel graphitic carbon coated IF-WS2 reinforced Poly (ether ether ketone) nanocomposites
Royal Society of Chemistry
© The Royal Society of Chemistry 2017. This Open Access Article is licensed under a Creative Commons Attribution-Non Commercial 3.0 Unported Licence: https://creativecommons.org/licenses/by-nc/3.0/
Unique high performance thermoplastic PEEK ternary nanocomposites reinforced by nano graphitic carbon coated IF-WS2 (inorganic fullerene-like tungsten disulphide) have been prepared and their structures have been characterised by electron microscopy imaging, electron dispersive spectrum elemental and X-ray diffractions scanning. The IF-WS2@C-PEEK composites exhibit impressive improvements in both the mechanical and thermal properties, with an extraordinary 54% enhancement in the ultimate tensile strength at 2 wt% and nearly 235% increase in thermal conductivity at 8 wt%. In addition, they also show an increase in decomposing temperature (over 50C) at higher IF-WS2@C contents. Further investigation reveals the activation energies estimated by Kissinger method to be 61 and 97 kJ∙mol-1 for neat PEEK and IF-WS2@C-PEEK respectively. This is ascribed to the enhanced dispersion ability and better interface bonding between PEEK matrix and IF-WS2@C nanoparticles, which for the first time has been investigated by FTIR and XPS analysis. These significantly improved properties will no doubt expand the applications of the PEEK-based nanocomposites.
We thank the EPSRC (EP/N034627/1) for financial support.
Vol. 7, pp. 35265-35273