From Sawdust to Masterpiece: The Art of 3D Printing with Wood Waste Ink

Posted on March 19, 2024 Updated on March 19, 2024

In the collaboration between Rice University and Oak Ridge National Laboratory, researchers have unveiled a revolutionary method for transforming wood waste into a versatile ink suitable for 3D printing. Published in the prestigious journal Science Advances, this pioneering research offers a sustainable solution for creating wood-like objects while mitigating the environmental impact of traditional woodworking practices. Traditionally, crafting wooden objects involves extensive processing of raw wood, resulting in significant waste in sawdust and wood scraps. However, researchers have developed an innovative approach to wood fabrication by repurposing this wood waste. The process begins with collecting wood waste, which is then finely ground into a dust-like consistency.

Next, the researchers employ a chemical treatment to separate the cellulose and lignin—the main components of wood—into nanocrystals and nanofibers. These components are then recombined with water to form a clay-like mixture, serving as the base ink for 3D printing. Using this wood waste ink, the research team successfully fabricated various small-scale objects, including miniature tables and chairs, using a 3D printer. To solidify the printed objects, a freeze-drying technique removes excess moisture, followed by heating at 180°C to fuse the cellulose and lignin, resulting in durable wood or wood-like products.

One notable advantage of this innovative approach is its ability to introduce wood-like textures into printed objects, providing a tactile and visually appealing finish. Additionally, the printed objects exhibit remarkable durability, with testing revealing up to six times the strength of objects made from original wood, particularly balsa wood. Moreover, the flexibility of the printed objects surpasses that of traditional wooden counterparts, offering new possibilities for design and application. While the research initially focused on small-scale objects, the potential applications extend to larger structures, including furniture and architectural elements.

This pioneering research represents a significant leap forward in sustainable manufacturing, offering a viable alternative to traditional woodworking practices. By harnessing wood waste to produce innovative ink for 3D printing, researchers are paving the way for a more eco-friendly and efficient approach to crafting wood-like objects.

Science Advances. 15 Mar 2024. Vol 10, Issue 11. DOI: 10.1126/sciadv.adk3250. Three-dimensional printing of wood.

By, Bob Yirka , Tech Xplore. Using wood waste products to produce ink for 3D printing of wood objects.