We continue to develop resources related to the COVID-19 pandemic. See COVID-19 initiatives on Appropedia for more information.
Mechanical Properties of Ultraviolet-Assisted Paste Extrusion and Postextrusion Ultraviolet-Curing of Three-Dimensional Printed Biocomposites
|By Michigan Tech's Open Sustainability Technology Lab.
Wanted: Students to make a distributed future with solar-powered open-source 3-D printing.
Pearce Publications: Energy Conservation • Energy Policy • Industrial Symbiosis • Life Cycle Analysis • Materials Science • Open Source • Photovoltaic Systems • Solar Cells • Sustainable Development • Sustainability Education
- 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
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.
3D printing; Mechanical testing; Natural fibre ; Natural fibre composites; Biopolymers; UV-assisted paste extrusion; biocomposite; 3D printing; mechanical properties; overhang testing; open-source platform
- Ystruder: open source multifunction extruder with sensing and monitoring capabilities
- Mechanical Properties of Components Fabricated with Open-Source 3-D Printers Under Realistic Environmental Conditions
- Tensile Strength of Commercial Polymer Materials for Fused Filament Fabrication 3-D Printing
- Anisotropic mechanical property variance between ASTM D638-14 type I and type IV fused filament fabricated specimens
- The Effects of PLA Color on Material Properties of 3-D Printed Components
- 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
- Finland: Aalto University Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites - 3D Print 64k
- Esperimento di ricercatori dell’Università di Aalto in Finlandia con estrusione di paste e polimerizzazione UV di biocompositi stampati in 3D- Stampare in 3D
- Forscher der Aalto Universität experimentieren mit Pastenextrusion und UV-Härtung von 3D-gedruckten Biokompositen 3D Ruck
- Finland: Aalto College Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites 3D Printing Zoom
- Aalto University Researchers Experiment with Paste Extrusion & UV Curing of 3D Printed Biocomposites Gyges 3D
|This page is part of an international project to use RepRap 3-D printing to make OSAT for sustainable development. Learn more.
Research: Open source 3-D printing of OSAT • RecycleBot • LCA of home recycling • Green Distributed Recycling • Ethical Filament • LCA of distributed manufacturing • RepRap LCA Energy and CO2 • Solar-powered RepRaps • solar powered recyclebot • Feasibility hub • Mechanical testing • RepRap printing protocol: MOST• Lessons learned • MOST RepRap Build • MOST Prusa Build • MOST HS RepRap build • RepRap Print Server