RT info:eu-repo/semantics/article
T1 Biopolyamide composites for fused filament manufacturing: impact of fibre type on the microstructure and mechanical performance of printed parts
A1 Núñez Carrero, Karina C.
A1 Herrero, Manuel
A1 Lizalde-Arroyo, Félix
A1 Merino, Juan Carlos
A1 Rodríguez-Pérez, Miguel Ángel
A1 Alonso Pastor, Luis Eduardo
A1 Oliveira Salmazo, Leandra
A1 Pastor Barajas, José María
K1 Impresión 3D
K1 Biopolímeros
K1 Biopolyamide
K1 Biopoliamida
K1 Fused filament fabrication (FFF)
K1 Fabricación por filamento fundido (FFF)
K1 Nanocomposites
K1 Nanocompuestos
K1 3312.10 Plásticos
K1 2211.02 Materiales Compuestos
AB As additive manufacturing (AM) becomes more widespread in ever more demanding applications, the performance demands on printed parts are increasing. Efforts are directed towards improving mechanical performance in all manufacturing directions, including requirements such as sustainability, economic viability, and weight savings. This work focuses on the systematic study of printed parts by manufacturing fused filaments fabrication (FFF) of a bio-based polyamide (PA11) reinforced with different types and amounts of fibres: short glass fibre (GF) and a needle-shaped nanofibre: sepiolite (SEP). The aim was to establish which of these two had the best balance between improving mechanical properties and forming intra- or interrater defects. The surprising results revealed that the different morphologies of these fillers induce two opposite stiffening mechanisms and defect microstructure. In the case of SEP, a change in the crystalline polymorph, a higher crystallization rate and the elevated dispersion of high and constant surface area fibres increase the stiffness at a lower effective load. Additionally, nanocomposites possess lower percentage porosity with more isotropic and smaller average inter-raster pores compared to GF composites. The latter are stiffened only by the immobilisation effect of the confined polymer chains in a system with a high dispersion of fibre sizes with heterogenous and intrarasterised defects. By contrast, these morphologies provide the GF composites with a more effective energy dissipation mechanism in impact tests and higher thermal stability.
PB Springer
SN 2363-9512
YR 2023
FD 2023-07-07
LK https://uvadoc.uva.es/handle/10324/74454
UL https://uvadoc.uva.es/handle/10324/74454
LA eng
NO Progress in Additive Manufacturing,  July 2023, vol. 9, p. 857–874
NO Producción Científica
DS UVaDOC
RD 30-ene-2025