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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.
https://hal.univ-grenoble-alpes.fr/hal-02021646
Contributeur : Sabine Rolland Du Roscoat <>
Soumis le : samedi 16 février 2019 - 14:51:16
Dernière modification le : vendredi 20 novembre 2020 - 12:54:03
Contributeur : Sabine Rolland Du Roscoat <>
Soumis le : samedi 16 février 2019 - 14:51:16
Dernière modification le : vendredi 20 novembre 2020 - 12:54:03
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