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Journal of Nanomaterials
Volume 2015, Article ID 470297, 9 pages
http://dx.doi.org/10.1155/2015/470297
Research Article

The Effect of Oxygen-Plasma Treated Graphene Nanoplatelets upon the Properties of Multiwalled Carbon Nanotube and Polycarbonate Hybrid Nanocomposites Used for Electrostatic Dissipative Applications

1Technopreneurship and Innovation Management, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand
2Plastics Technology Lab, Polymer Research Unit, National Metal and Materials Technology Center, Pathum Thani 12120, Thailand
3Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand

Received 13 November 2014; Revised 5 January 2015; Accepted 5 January 2015

Academic Editor: Stefan I. Voicu

Copyright © 2015 Akkachai Poosala et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Oxygen-plasma treated graphene nanoplatelet (OGNP), multiwalled carbon nanotube (MWCNT) and polycarbonate (PC) hybrid nanocomposites were prepared via a melting process using a twin-screw extruder. The contents of the OGNPs were in the range of 0.0 to 5.0 parts per hundred resin (phr), whilst the dosage of MWCNTs was kept at a constant of 2.0 wt%. Nanocomposites containing 2.0 wt% of MWCNTs and mixtures of 2.0 wt% of MWCNTs at 1.5 to 5.0 phr of OGNPs had tribocharged voltages, surface resistivities, and decay times, all within the electrostatic discharge (ESD) specification. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) results revealed that the OGNPs slightly intercalated and distributed also within the PC matrix. The glass transition temperature and heat capacity jump, at the glass transition stages of nanocomposite, slightly changed, as the contents of the OGNPs increased. The melt flow index (MFI) of nanocomposites significantly decreased when MWCNTs were added to the PC resin and slightly changed as the dosage of OGNPs was increased. Tensile Young’s modulus of nanocomposites tended to increase, as the elongation at break and impact strength decreased, when OGNP concentrations were increased. This research work exhibited that OGNP/MWCNT/PC hybrid nanocomposites do indeed have the potential to be used in ESD applications.