Abstract
The interfacial bonding strength of the two deposited layers under the material extrusion process is always considered a shortcoming in the 3D-printed part. To address this issue, an extra polymer coating is added to the extruded filament by adding another self-designed nozzle concentrically to the original nozzle on the 3D printing head. Three filaments were used in the fabrication process: continuous carbon fiber as reinforcement filament, polylactic acid (PLA) filament as polymer substrate filament, and carbon nanotube (CNT)/PLA filament as polymer coating filament. In addition, the effect of CNT concentration on the 3D-printed thin-walled cylinder CNT/PLA/continuous carbon fiber (CF) composite was investigated by compressive buckling tests. Compared with 3D-printed thin-walled cylinder PLA/CF composite, the buckling loads were enhanced by 16.7%, 32.5%, 40.7%, and 50.1% under 5 wt%, 10 wt%, 15 wt%, and 20 wt% CNT concentration in the PLA polymer filament. This new 3D printing design creates a new possible solution to strengthen the 3D-printed part and can border the application of 3D-printed parts by varying polymer coating type through modifying the nanofiller-modified polymer filament.
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Acknowledgements
The author is grateful to the Department of Mechanical and Automotive Engineering under the Hefei University of Technology for providing the materials and manufacturing platform. The author is also grateful to the startup funding from Prof. Yong Wang under Department of Mechanical and Automotive Engineering of the Hefei University of Technology. The author also wish to acknowledge the material Elium resin which is provided by Arkema Inc.
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Dongyang Cao: conceptualization; data curation; formal analysis; investigation; resources; roles/writing-original draft; writing-review and editing.
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Cao, D. Enhanced buckling strength of the thin-walled continuous carbon fiber–reinforced thermoplastic composite through dual coaxial nozzles material extrusion process. Int J Adv Manuf Technol 128, 1305–1315 (2023). https://doi.org/10.1007/s00170-023-12014-8
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DOI: https://doi.org/10.1007/s00170-023-12014-8