Multifunctional performance of carbon nanotubes and graphene nanoplatelets reinforced PEEK composites enabled via FFF additive manufacturing

Arif, M.F., Alhashmi, H., Varadarajan, K.M., Koo, J. H., Hart, A.J. and Kumar, S. (2020) Multifunctional performance of carbon nanotubes and graphene nanoplatelets reinforced PEEK composites enabled via FFF additive manufacturing. Composites Part B: Engineering, 184, 107625. (doi: 10.1016/j.compositesb.2019.107625)

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Abstract

The study is focused on multifunctional performance of carbon nanotubes (CNT) and Graphene nanoplatelets (GNP) reinforced PEEK composites enabled via fused filament fabrication (FFF) additive manufacturing (AM) utilizing in-house nanoengineered filaments. Thermo-physical, mechanical and wear characteristics of electro-conductive PEEK nanocomposites are reported. The coefficient of thermal expansion (CTE) is found to decrease by 26% and 18% with the incorporation of 5 wt% GNP and 3 wt% CNT into PEEK polymer, respectively. The decrease in CTE provides better dimensional stability to resulting nanocomposite structures. Due to uniform dispersion of CNT and GNP in the PEEK matrix, the crystallization temperature and degree of crystallinity are both increased. The 3D printed PEEK nanocomposites reveal interfacial voids between the beads and intra-bead pores and thus exhibit lower density compared to that of the 3D printed neat PEEK. Young's and storage moduli are found to increase by 20% and 66% for 3 wt% CNT loading and by 23% and 72% for 5 wt% GNP loading respectively. However, the PEEK nanocomposites exhibit similar tensile strength to that of neat PEEK. The coefficient of friction obtained from fretting wear tests is found to decrease by 67% and 56% for 1 wt% CNT and 3 wt% GNP loaded PEEK nanocomposites, respectively and the decrease is attributed to reduced hardness and increased porosity. Multifunctional performance of carbon nanostructures reinforced AM-enabled PEEK composites demonstrated here makes them suitable for a range of applications such as orthopedics, oil and gas, automotive, electronics and space.

Item Type:Articles
Additional Information:This publication is based upon work supported by the Khalifa University of Science and Technology under Award No. CIRA-2018-128.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Shanmugam, Dr Kumar
Authors: Arif, M.F., Alhashmi, H., Varadarajan, K.M., Koo, J. H., Hart, A.J., and Kumar, S.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Composites Part B: Engineering
Publisher:Elsevier
ISSN:1359-8368
ISSN (Online):1879-1069
Published Online:27 November 2019
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in Composites Part B: Engineering 184:107625
Publisher Policy:Reproduced under a Creative Commons Licence

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