RT journal article
T1 Development of Polymer Composites Using Surface-Modified Olive Pit Powder for Fused Granular Fabrication
A1 Burgos Pintos, Pedro
A1 Maturi, Mirko
A1 Sanz de León, Alberto
A1 Molina Rubio, Sergio Ignacio
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
A2 Ingeniería Mecánica y Diseño Industrial
K1 large format additive manufacturing
K1 fused granular fabrication
K1 olive pit
K1 agro-waste valorization
K1 bio-based composites
K1 surface modification
AB In this study, olive pit agro-waste from the olive oil industry is valorized by incorporating itas an additive in a polyethylene terephthalate glycol (PETG) matrix to develop bio-based compositematerials for large format additive manufacturing (LFAM). The olive pits were first ground into olivepit powder (OPP) and then functionalized by polymerizing poly(butylene adipate-co-terephthalate)PBAT on their surface, resulting in a hydrophobic, modified olive pit powder (MOPP) with enhancedcompatibility with the PETG matrix. OPP and MOPP composites were compounded and 3D-printedvia Fused Granular Fabrication (FGF) using 5, 10, and 15 wt.% concentrations. The PBAT coatingincreased the degradation temperature and specific heat capacity of the material, contributing toa lower melt viscosity during printing, as confirmed by MFR, MDSC, and TGA analyses. Tensiletesting revealed that MOPP composites generally exhibited superior mechanical properties comparedto OPP composites, likely due to the improved compatibility between PBAT on the MOPP surfaceand the PETG matrix. SEM analysis further validated these findings, showing a highly irregular andporous fracture surface in OPP composites, while MOPP composites displayed a smooth surface withwell-integrated MOPP in the PETG matrix.
PB MDPI
SN 2073-4360
YR 2024
FD 2024-10-24
LK http://hdl.handle.net/10498/35635
UL http://hdl.handle.net/10498/35635
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026