[en] 3D-printed poly(L,L-lactide) (PLLA)-based auxetic metamaterials with non-conventional re-entrant honeycomb auxetic cell architectures and compositional gradients of successive PLLA and plasticized PLLA layers are formed. For plasticized PLLA, melt-plasticization was conducted with hydrophilic poly(ethylene glycol) (PEG, 10 and 20 wt%) as an efficient PLLA plasticizer for bone-regeneration applications providing polyester chain mobility, ductility, drawability, and hydrophilicity. Programming these structures leads to the design of bone substituting materials (BSMs), combining high strength as well as energy absorption into a single device during fused deposition modeling (FDM) fabrication. The latter leads to the design of unique bone substituting materials adequately addressing the porosity, the compressive modulus and the impact strength of the natural cancellous bone that has never reported. Lattice structure (grid and re-entrant honeycomb patterns), infill density (100% and 50%), printing orientation (0° and 90°), unit cell size (differing by 20%) and chemical composition (PLLA and plasticized PLLA) were evaluated to establish structure-properties relationships.
Disciplines :
Chemistry
Author, co-author :
Mincheva, Rosica ; Université de Mons - UMONS > Faculté des Sciences > Service des Matériaux Polymères et Composites
Odent, Jérémy ; Université de Mons - UMONS > Faculté des Sciences > Service des Matériaux Polymères et Composites
Abdeljawad, M. Ben; Laboratory of Polymeric and Composite Materials, CIRMAP, University of Mons, Mons, Belgium
Martin, Brandenbourger; Unité d’enseignement en Transferts, Interfaces et Procédés, Ecole Polytechnique de Bruxelles, Université libre de Bruxelles, Brussels, Belgium ; IRPHE, UMR 7342, CNRS, Aix-Marseille Université, Centrale Marseille, Marseille, France
Lambert, P.; Unité d’enseignement en Transferts, Interfaces et Procédés, Ecole Polytechnique de Bruxelles, Université libre de Bruxelles, Brussels, Belgium
Raquez, Jean-Marie ; Université de Mons - UMONS > Faculté des Sciences > Service des Matériaux Polymères et Composites
Language :
English
Title :
3D-printed gradient-like poly(L,L-lactide)-based auxetic materials for bone regeneration applications
Publication date :
October 2025
Journal title :
Progress in Additive Manufacturing
ISSN :
2363-9512
eISSN :
2363-9520
Publisher :
Springer Science and Business Media Deutschland GmbH
Research Institute for Materials Science and Engineering
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique M-ERA.NET FEDER Wallonia
Funding text :
Fonds De La Recherche Scientifique\u2014FNRS, M-ERA. NET, POLYMAGIC, FEDER Wallonia, LCFM-BIOMAT, Rosica Mincheva, Bioprofiling, Rosica Mincheva.This research was funded by the M-ERA.NET grant POLYMAGIC and the European Regional Development Fund and the Walloon Region grants LCFM-BIOMAT and Bioprofiling platform. Jean-Marie Raquez was funded by FRS-FNRS.
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