3D Printed Microtimber From Macadamia Nut Shells

Macadamia nut shells are used for 3d printing of microtimber products.

Macadamia nut shells are used for 3d printing of microtimber products.

Macadamia nuts are delicious but their shells have simply been discarded — until now. According to the 3Ders website, researchers at the University of Sydney are exploring ways to turn those unwanted shells into sustainable 3D printed microtimber products that can be used like traditional wood products.

“We want to create innovative, environmentally-resilient panels that are customized to react optimally to structural stress and weather exposure of a building,” said Dr. Sandra Löschke, director of architecture, design and technology at the University of Sydney and a co-leader of the research team. “The work lies in the micro-layering and fusing of different 3D-printed timber compositions to provide a unique material and geometric gradient suitable for large-scale building projects.”

Macadamia nut shells are used for 3d printing of microtimber products.The research has been partially funded by the Forestry and Wood Products Association and has been underway for three years. It is focused primarily on experiments that test the material compositions to determine if they result in marketable microtimber products. While the experiments target the use of  macadamia shells, other forestry waste products may be suitable as raw materials for 3D printing as well.

Andy Dong, head of  engineering innovation at the University of Sydney says, “Architectural and structural design aspirations are driving innovations in new value-added timber products, including the conversion of so-called waste material into a bespoke product. The anticipated outcomes of the research are highly significant for the forestry industry. It could fundamentally change the way Australia produces timber-based products.”

This isn’t the first time that the University of Sydney has made the news for its 3D printing research. It has been involved in a variety of 3D printing projects, from revolutionary 3D printed bone replacements and bioprinted vascular networks to 3D printed synthetic bone substitutes.

While there are few details to share about the microtimber process at present, it is expected that the fruits of the research may be ready to move out of the laboratory and into the marketplace by the end of 2016.

Photos: University of Sydney


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