• Electrically conductive high–performance thermoplastic filaments for fused filament fabrication

Kaynan, Ozge, Yildiz, Alptekin, Bozkurt, Yunus Emre, Ozden Yenigun, Elif and Cebeci, Hulya, 2020, Journal Article, Electrically conductive high–performance thermoplastic filaments for fused filament fabrication Composite Structures, 237. pp. 1-9. ISSN 0263-8223

Abstract or Description:

Conductive polyetherimide (PEI)-based filaments can fill the gap between the design and manufacturing of functional and structural components through additive manufacturing. This study systematically describes the fabrication of carbon nanotube (CNTs)-reinforced PEI filaments, complemented by a custom-built extrusion process facilitating low weight fraction of nanomaterials. Neat PEI and CNTs/PEI filaments at different CNTs fractions ranging from 0.1 to 7 wt. % were fabricated. Supported by morphology analysis, the rheological percolation was found to be higher (0.25 wt. % CNTs/PEI) than electrical percolation (0.1 wt. % CNTs/PEI) since the system reached an electrical percolation within the formation of a continuous conductive path at lower CNTs loadings. With the 7 wt. % CNTs loading, the highest electrical conductivity of CNTs/PEI filaments was reported as 2.57 × 10−1 S/cm. A 55% enhancement in tensile modulus was achieved when 5 wt. % CNTs were introduced, but in a trade-off in elongation at break ca. 65%.

Subjects: Other > Engineering > H400 Aerospace Engineering
School or Centre: School of Design
Funders: The authors are thankful for the Boeing Global Co. project numbered 2016000269 for financial support., The authors thank TUBITAK 3501 (Project No: 116M427) for the postgraduate student scholarship support for Ozge Kaynan.
Identification Number or DOI: https://doi.org/10.1016/j.compstruct.2020.111930
Date Deposited: 13 Jan 2020 16:09
Last Modified: 14 Jan 2021 08:38
URI: https://researchonline.rca.ac.uk/id/eprint/4246
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