Enhancing the Yield Stress in Liquid Polydimethylsiloxane to Allow Its 3D Printing: Hydrogels as Removable Fillers |
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Authors: | Clément Perrinet Edwin-Joffrey Courtial Arthur Colly Christophe Marquette René Fulchiron |
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Affiliation: | 1. Univ Lyon, Université Claude Bernard Lyon 1, CNRS, Ingénierie des Matériaux Polymères, UMR5223, Villeurbanne, F-69622 France;2. 3d.FAB, Univ Lyon, Université Lyon1, CNRS, INSA, CPE-Lyon, ICBMS, UMR 5246, 43, Bd du 11 novembre 1918, Villeurbanne, Cedex, 69622 France |
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Abstract: | For manufacturing parts of very soft materials by liquid deposition modeling (e.g., to mimic living soft tissues), formulations of 3D-printable polydimethylsiloxane have been developed, with the aim of increasing the yield stress of the liquid and reducing the final mechanical modulus. In the present work, suspensions of solid-like hydrogel particles, which are easily 3D-printable, are prepared in order to generate yield stress, and the suspended phase is removed after manufacturing by taking advantage of the thermo-reversibility of the hydrogel behavior, resulting in porosity, which reduces the final rigidity. The reported approach is even more efficient than a previous approach based on emulsion formulations. |
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Keywords: | additive manufacturing hydrogel silicone suspensions yield stress fluid |
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