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    Hybrid additive manufacturing of polymer composites reinforced with buckypapers and short carbon fibres

    Year: 2022

    Journal: Compos. Pt. A-Appl. Sci. Manuf., Volume 154, MAR

    Authors: Gackowski, Bartosz Mikolaj; Phua, Helixman; Sharma, Mohit; Idapalapati, Sridhar

    Organizations: Agency for Science, Technology and Research (A*STAR); Singapore International Graduate Award (SINGA)

    Keywords: 3-D printing; Buckypaper; Carbon fibres; Carbon nanotubes and nanofibers

    A new hybrid additive manufacturing method is proposed that aims to simplify preparation of polymer composites reinforced with short fibres and nanotubes in a cost-effective manner. The process is based on thin films embedded into the 3D-printed structure, so-called buckypapers, created on-site from a suspension delivered directly onto a plastic layer. The weight percent of the buckypapers can be controlled by the composition of the suspension and the number of buckypapers (from 1 to 20) in the sample. The highest increase (similar to 97%) in tensile strength was reported after embedding one buckypaper (0.2 wt%). The addition of eight hybrid buckypapers (4.5 wt%) increased tensile modulus by up to 4.4 GPa (similar to 76%). The interlaminar shear strength increased by 23% after embedding one hybrid buckypaper (0.6 wt%). The failure mechanisms of the composites under various loading conditions are discussed with fractography along with potential future applications of the manufacturing method.
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