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A fibrous cellulose paste formulation to manufacture structural parts using 3D printing by extrusion

Abstract : An optimized paste based on short natural cellulose fibers combined with carboxymethyl cellulose at a high dry content (42 wt.%) was implemented as a bio-based material for 3D printing by extrusion. The homogeneous paste exhibited a pronounced thinning behavior and yield stress; it was extruded using a screw extrusion-based direct ink writing system and could easily flow through a small nozzle. The optimized formulation enabled accurate additive manufacturing of parts using a natural air-drying process with or without an ethanol bath. We characterized the anisotropic shrinkage that occurred during the drying of 3D printed parts and proposed a compensation method to account for it. The obtained results emphasized that cellulose had a strong potential to be used as a raw material for 3D printing of cheap, lightweight, robust, and recyclable parts.
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Soumis le : vendredi 22 octobre 2021 - 07:55:40
Dernière modification le : mardi 22 mars 2022 - 13:12:20
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C. Thibaut, A. Denneulin, S. Rolland Du Roscoat, D. Beneventi, L. Orgeas, et al.. A fibrous cellulose paste formulation to manufacture structural parts using 3D printing by extrusion. Carbohydrate Polymers, Elsevier, 2019, 212, pp.119-128. ⟨10.1016/j.carbpol.2019.01.076⟩. ⟨hal-02021646⟩



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