The effect is that cellulose and other raw material based on wood will be able to compete with fossil-based plastics and metals in the on-going additive manufacturing revolution
Paul Gatenholm, professor in Polymer TA group of researchers at Chalmers University of Technology have managed to print and dry three-dimensional objects made entirely by cellulose for the first time with the help of a 3D-bioprinter. They also added carbon nanotubes to create electrically conductive material. The effect is that cellulose and other raw material based on wood will be able to compete with fossil-based plastics and metals in the on-going additive manufacturing revolution, which started with the introduction of the 3D-printer.
3D printing is a form of additive manufacturing that is predicted to revolutionise the manufacturing industry. The precision of the technology makes it possible to manufacture a whole new range of objects and it presents several advantages compared to older production techniques. The freedom of design is great, the lead time is short, and no material goes to waste.
Plastics and metals dominate additive manufacturing. However, a research group at Chalmers University of Technology have now managed to use cellulose from wood in a 3D printer.
“Combing the use of cellulose to the fast technological development of 3D printing offers great environmental advantages,” says Paul Gatenholm, professor of Biopolymer Technology at Chalmers and the leader of the research group. “Cellulose is an unlimited renewable commodity that is completely biodegradable, and manufacture using raw material from wood, in essence, means to bind carbon dioxide that would otherwise end up in the atmosphere.
The breakthrough was accomplished at Wallenberg Wood Science Center, a research center aimed at developing new materials from wood, at Chalmers University of Technology.
The difficulty using cellulose in additive manufacturing is that cellulose does not melt when heated. Therefore, the 3D printers and processes designed for printing plastics and metals cannot be used for materials like cellulose. The Chalmers researchers solved this problem by mixing cellulose nanofibrils in a hydrogel consisting of 95-99 percent water. The gel could then in turn be dispensed with high fidelity into the researchers’ 3D bioprinter, which was earlier used to produce scaffolds for growing cells, where the end application is patient-specific implants.
The next challenge was to dry the printed gel-like objects without them losing their three-dimensional shape.
“The drying process is critical,” Paul Gatenholm explains. “We have developed a process in which we freeze the objects and remove the water by different means as to control the shape of the dry objects. It is also possible to let the structure collapse in one direction, creating thin films.
Furthermore, the cellulose gel was mixed with carbon nanotubes to create electrically conductive ink after drying. Carbon nanotubes conduct electricity, and another project at Wallenberg Wood Science Center aims at developing carbon nanotubes using wood.
Using the two gels together, one conductive and one non-conductive, and controlling the drying process, the researchers produced three-dimensional circuits, where the resolution increased significantly upon drying.
The two gels together provide a basis for the possible development of a wide range of products made by cellulose with in-built electric currents.
“Potential applications range from sensors integrated with packaging, to textiles that convert body heat to electricity, and wound dressings that can communicate with healthcare workers,” says Paul Gatenholm. “Our research group now moves on with the next challenge, to use all wood biopolymers, besides cellulose.
Read more: Cellulose from wood can be printed in 3D
The Latest on: 3D cellulose printing
via Google News
The Latest on: 3D cellulose printing
- Exploring & Strengthening Wood Composites for Better Layer Adhesion & Versatilityon November 24, 2019 at 12:11 am
Gardner and Lu Wang explore the use of wood composites, including additives such as sawdust, wood flour, lignin, and cellulose. Like composites used ... area greater reinforcement—strengthening 3D ...
- Researchers Create 3D Printed Bacterial Cellulose Material for Wound Healingon October 29, 2019 at 3:15 am
Kanjou, Hassan Abdulhakim, Gabriel Molina de Olyveira, and Pierre Basmaji published a paper, titled “3-D Print Celulose Nanoskin: Future Diabetic Wound Healing,” about using bacterial cellulose for ...
- 3D Printed Boat Sets Guinness World Recordon October 15, 2019 at 3:06 pm
By 3D printing plastics with 50 percent wood ... (ORNL), the U.S. Department of Energy’s largest science and energy laboratory, will focus on cellulose nanofiber (CNF) production, drying, ...
- The Market for Cellulose Nanofibers in Japan | Forecast to 2030 - ResearchAndMarkets.comon October 15, 2019 at 6:58 am
For more information about this report visit https://www.researchandmarkets.com/r/51f5zh ...
- UMaine unveils world’s largest 3D printeron October 11, 2019 at 8:50 am
Placing cellulose nano fiber into plastics results in strong, stiff and recyclable bio-derived material that becomes filament in the 3D printer. The research will focus on cellulose nanofiber ...
- Solid matrix-assisted printing for three-dimensional structuring of a viscoelastic medium surfaceon October 11, 2019 at 2:11 am
A generic tool for the versatile 3D printing of bio-organs and scaffolds may be possible based on the described techniques. A CNF hydrogel was produced from kraft pulp (Moorim P&P, Ulsan, Korea). The ...
- Wood-Based 3D-Printed Sensors Include Wireless Accesson September 15, 2019 at 5:00 pm
Using wood—or to be more precise, cellulose derived from wood ... 2. These three 3D-printed inductor-capacitor (LC) circuit samples have different thicknesses with different printing paths; for ...
- 3D-printing breakthrough paves the way for printed "wooden" productson June 27, 2019 at 3:00 pm
This boosted the strength of the gel, acting as a glue to help hold the cellulose fibers together. Additionally, they digitized the genetic code of natural wood, then used that code to instruct a 3D ...
- Researchers Develop Cellulose-Based, 3D Printed IoT Sensorson June 23, 2019 at 5:00 pm
Green technology is looking a little brighter as Canadian, Swiss, and South Korean researchers are working to use wood-derived cellulose material and 3D printing to create eco-friendly Internet of ...
- UPM and Carbodeon Developing Cellulose and Nanodiamond Materials for 3D Printingon April 4, 2019 at 3:46 am
UPM and Carbodeon are developing cellulose and nanodiamond reinforced raw materials for 3D printing. The nanodiamond additives provide the product not only improved stiffness and strength but also ...
via Bing News