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* [[Mechanical properties of 3-D printed truss-like lattice biopolymer non-stochastic structures for sandwich panels with natural fibre composite skins]]
* [[Mechanical properties of 3-D printed truss-like lattice biopolymer non-stochastic structures for sandwich panels with natural fibre composite skins]]
* [[Wood Furniture Waste-Based Recycled 3-D Printing Filament]]
* [[Wood Furniture Waste-Based Recycled 3-D Printing Filament]]
==News==
# [https://3dprint.com/245551/finland-aalto-university-researchers-experiment-with-paste-extrusion-uv-curing-3d-printed-biocomposites/ Finland: Aalto University Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites ]- 3D Print 64k
# [http://www.stamparein3d.it/esperimento-di-ricercatori-delluniversita-di-aalto-in-finlandia-con-estrusione-di-paste-e-polimerizzazione-uv-di-biocompositi-stampati-in-3d/ Esperimento di ricercatori dell’Università di Aalto in Finlandia con estrusione di paste e polimerizzazione UV di biocompositi stampati in 3D]- Stampare in 3D
# [https://3druck.com/3d-druckmaterialien/forscher-der-aalto-universitaet-experimentieren-mit-pastenextrusion-und-uv-haertung-von-3d-gedruckten-biokompositen-3882651/ Forscher der Aalto Universität experimentieren mit Pastenextrusion und UV-Härtung von 3D-gedruckten Biokompositen] 3D Ruck
# [https://3dprintingzoom.com/2019/06/04/finland-aalto-college-researchers-experiment-with-paste-extrusion-uv-curing-of-3d-printed-biocomposites/ Finland: Aalto College Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites] 3D Printing Zoom
# [http://gyges3d.com/news/bio-printing/aalto-university-researchers-experiment-with-paste-extrusion-uv-curing-of-3d-printed-biocomposites/ Aalto University Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites] Gyges 3D


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Revision as of 17:39, 5 November 2019


Source

  • Niklas Kretzschmar, Sami Lipponen, Ville Klar, Joshua M. Pearce, Tom L. Ranger, Jukka Seppälä, and Jouni Partanen. Mechanical Properties of Ultraviolet-Assisted Paste Extrusion and Postextrusion Ultraviolet-Curing of Three-Dimensional Printed Biocomposites. 3D Printing and Additive Manufacturing. 6(3) 127-137, 2019. https://doi.org/10.1089/3dp.2018.0148 open access
3dp.2019.6.issue-3.cover.jpg

Abstract

Three-dimensional (3D) printing of biomaterials has the potential to become an ecologically advantageous alternative compared with conventional manufacturing based on oil-derived polymer materials. In this study, a novel 3D printing technology is applied that combines ultraviolet (UV) curing with paste extrusion. This hybrid manufacturing technique enables the fabrication of complex geometries from high filler-ratio pastes. The developed biocomposite aims for suitable mechanical properties in terms of tensile and compressive strength. It is composed of acrylic acid, cellulose acetate, α-cellulose, and fumed silica with a cellulose ratio of more than 25 vol-%. The material is extruded with an in-house-developed 3D printer equipped with a 12 W UV light curing source, which enables concurrent curing and extrusion. Two different UV-curing strategies were tested: postcuring without concurrent curing and postcuring with concurrent curing. The total UV-curing duration was kept constant with all samples. Tensile testing in accordance with ASTM standard D638-14 Type 4, compression testing according to ASTM D695-15, and overhang tests were conducted. As a result, samples without notable shrinkage, suitable tensile strength (up to 17.72 MPa), competitive compression testing parameters (up to 19.73 MPa), and an enhanced overhang angle (increase of more than 25°) were produced, leading to new applications and more freedom in design due to higher possible unsupported overhangs when using UV-curing during the print. Overall, constant UV light radiation during the print leads to improved mechanical properties due to the possibility of bypassing the UV-penetration depth constraint. It should be considered when extruding photopolymer-based composites, especially for large and complex components with a low degree of translucency.

Keywords

   3D printing; Mechanical testing; Natural fibre ; Natural fibre composites; Biopolymers; UV-assisted paste extrusion; biocomposite; 3D printing; mechanical properties; overhang testing; open-source platform

See Also

News

  1. Finland: Aalto University Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites - 3D Print 64k
  2. Esperimento di ricercatori dell’Università di Aalto in Finlandia con estrusione di paste e polimerizzazione UV di biocompositi stampati in 3D- Stampare in 3D
  3. Forscher der Aalto Universität experimentieren mit Pastenextrusion und UV-Härtung von 3D-gedruckten Biokompositen 3D Ruck
  4. Finland: Aalto College Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites 3D Printing Zoom
  5. Aalto University Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites Gyges 3D
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