Institut National De Recherche Pour L'agriculture, L'alimentation Et L'environnement

Ecole Nationale Vétérinaire, Agroalimentaire Et De L'alimentation

Patricia Le-bail

Bianca Maniglia

Alain Le-bail

Disclosed is a method of additive manufacturing by hot-extrusion, which method of additive manufacturing includes the following successive steps: a providing step, wherein a printable composition is provided, the printable composition including an aqueous printing matrix, in which non-gelatinized starch granules are dispersed, wherein the non-gelatinized starch granules are in a non-gelled state and have a gelatinization temperature below 70° C.; and a printing step, wherein the printable composition is subjected to a heat treatment and is deposited layer by layer. During the printing step, the printable composition is subjected to a succession of two different heating temperatures: a storage heating temperature, lower than the gelatinization temperature, in order to heat the printable composition without gelatinizing the non-gelatinized starch granules, and a printing heating temperature, higher than the gelatinization temperature, in order to gelatinize the non-gelatinized starch granules in the layers.

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NANTES, France

Patricia Le-bail