Linking formulation feedstock to printability by robocasting: A case study of eco-friendly alumina pastes
Delphine Gourdonnaud,
Julie Bourret,
Vincent Pateloup,
Lisa Giardi,
Luc Picton,
Vincent Chaleix,
Thierry Chartier,
Benoit Naït-Ali,
Marguerite Bienia,
Pierre-Marie Geffroy
Affiliations
Delphine Gourdonnaud
CNRS, Institute of Research for Ceramic (IRCER), UMR 7315, University of Limoges, European Ceramic Center, 12 rue Atlantis, F-87068, Limoges, Cedex, France
Julie Bourret
CNRS, Institute of Research for Ceramic (IRCER), UMR 7315, University of Limoges, European Ceramic Center, 12 rue Atlantis, F-87068, Limoges, Cedex, France; Corresponding author.
Vincent Pateloup
CNRS, Institute of Research for Ceramic (IRCER), UMR 7315, University of Limoges, European Ceramic Center, 12 rue Atlantis, F-87068, Limoges, Cedex, France
Lisa Giardi
CNRS, Institute of Research for Ceramic (IRCER), UMR 7315, University of Limoges, European Ceramic Center, 12 rue Atlantis, F-87068, Limoges, Cedex, France
Luc Picton
University of Rouen Normandie, INSA Rouen Normandie, CNRS, PBS UMR 6270, F-76000 Rouen, France
Vincent Chaleix
LABCiS, UR 22722, University of Limoges, 33 rue François Mitterrand, F-87032, Limoges, France
Thierry Chartier
CNRS, Institute of Research for Ceramic (IRCER), UMR 7315, University of Limoges, European Ceramic Center, 12 rue Atlantis, F-87068, Limoges, Cedex, France
Benoit Naït-Ali
CNRS, Institute of Research for Ceramic (IRCER), UMR 7315, University of Limoges, European Ceramic Center, 12 rue Atlantis, F-87068, Limoges, Cedex, France
Marguerite Bienia
CNRS, Institute of Research for Ceramic (IRCER), UMR 7315, University of Limoges, European Ceramic Center, 12 rue Atlantis, F-87068, Limoges, Cedex, France
Pierre-Marie Geffroy
CNRS, Institute of Research for Ceramic (IRCER), UMR 7315, University of Limoges, European Ceramic Center, 12 rue Atlantis, F-87068, Limoges, Cedex, France
Robocasting stands as a pertinent additive manufacturing technique for producing intricate ceramic parts. Amidst stricter environmental regulations, the adoption of natural additives becomes imperative. This study investigates the influence of plant-based additives on the rheology and printability of eco-friendly pastes.Various 50 vol%-alumina pastes were formulated using natural binders, plasticizers and dispersants (e.g., lignosulfonate, polysaccharides, glycerol) and then assessed through oscillation and flow rheological analyses. Paste viscosity and rigidity often deviated from printability maps reported in the literature, showing the complexity of defining universal printability criteria. A comprehensive investigation was conducted on the water retention capabilities of additives, liquid phase migration and paste drying kinetics.This paper highlights the critical importance of constraining liquid phase migration within eco-friendly ceramic pastes and the crucial role of polymer chain reorientation under shear. Consequently, this research lays diversifying formulations, offering sustainable solutions for industrial ceramic applications.
