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Open AccessArticle

Graphene/Carbon Nanotube Hybrid Nanocomposites: Effect of Compression Molding and Fused Filament Fabrication on Properties

1
Department of Industrial Engineering and INSTM Research Unit, University of Trento, 38123 Trento, Italy
2
Department of Mechanical Engineering, Federal University of Santa Catarina—UFSC, Florianópolis 88040-900, SC, Brazil
*
Author to whom correspondence should be addressed.
Polymers 2020, 12(1), 101; https://doi.org/10.3390/polym12010101
Received: 15 November 2019 / Revised: 16 December 2019 / Accepted: 19 December 2019 / Published: 4 January 2020
(This article belongs to the Special Issue Eurofillers Polymer Blends)
The present work reports on the production and characterization of acrylonitrile butadiene styrene (ABS) hybrid nanocomposite filaments incorporating graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs) suitable for fused filament fabrication (FFF). At first, nanocomposites with a total nanofiller content of GNP and/or CNT of 6 wt.% and a GNP/CNT relative percentage ratio of 0, 10, 30, 50, 70, and 100 were produced by melt compounding and compression molding. Their mechanical, electrical resistivity, and electromagnetic interference shielding effectiveness (EMI SE) properties were evaluated. The hybrid nanocomposites showed a linear increase in modulus and decrease in strength as a function of GNP content; on the other hand, the addition of CNT in hybrid nanocomposites determined a positive increase in electrical conductivity, but a potentially critical decrease of melt flow index. Due to the favorable compromise between processability and enhancement of performance (i.e., mechanical and electrical properties), the hybrid composition of 50:50 GNP/CNT was selected as the most suitable for the filament production of 6 wt.% carbonaceous nanocomposites. EMI SE of ABS-filled single CNT and hybrid GNP/CNT nanofillers obtained from compression molding reached the requirement for applications (higher than −20 dB), while slightly lower EMI SE values (in the range −12/−16 dB) were obtained for FFF parts dependent on the building conditions. View Full-Text
Keywords: conductive composites; carbon nanotubes; graphene; electromagnetic interference shielding; mechanical properties conductive composites; carbon nanotubes; graphene; electromagnetic interference shielding; mechanical properties
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MDPI and ACS Style

Dul, S.; Ecco, L.G.; Pegoretti, A.; Fambri, L. Graphene/Carbon Nanotube Hybrid Nanocomposites: Effect of Compression Molding and Fused Filament Fabrication on Properties. Polymers 2020, 12, 101. https://doi.org/10.3390/polym12010101

AMA Style

Dul S, Ecco LG, Pegoretti A, Fambri L. Graphene/Carbon Nanotube Hybrid Nanocomposites: Effect of Compression Molding and Fused Filament Fabrication on Properties. Polymers. 2020; 12(1):101. https://doi.org/10.3390/polym12010101

Chicago/Turabian Style

Dul, Sithiprumnea; Ecco, Luiz G.; Pegoretti, Alessandro; Fambri, Luca. 2020. "Graphene/Carbon Nanotube Hybrid Nanocomposites: Effect of Compression Molding and Fused Filament Fabrication on Properties" Polymers 12, no. 1: 101. https://doi.org/10.3390/polym12010101

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