Steel-strong wonder wood is made
February, 2018: In a study published recently in the journal Nature, engineers
of Maryland University, USA reports the discovery of a novel method processing
of natural wood to make it at least 10 times stronger and tougher.
The Maryland engineers have developed a two-step process for the purpose. In the first step, the lignin and hemicellulose from the natural wood was partially removed by a boiling process in an aqueous mixture of NaOH and Na2SO3. It was then followed by hot-pressing, which lead to the total collapse of cell walls and the complete densification of the natural wood with highly aligned cellulose nanofibres.
Hu, an associate professor of materials science and engineering, says: “This could be a competitor to steel or even titanium alloys, it is so strong and durable. It's also comparable to carbon fiber, but much less expensive." "This kind of wood could be used in cars, airplanes, buildings -- any application where steel is used," Hu added.
These results paves way for a new array of wood-based products, working on the basis of natural nanotechnology. There exists already an exciting array of nanocellulose related materials. They include:
- super clear paper for replacing plastic;
- photonic paper for improving solar cell efficiency by 30%;
- a battery and a super-capacitor out of wood;
- a battery from a leaf;
- transparent wood for energy efficient buildings;
- solar water desalination for drinking and specifically filtering out toxic dyes.
This obviously trigger a new wood-based revolution in new generation building and manufacturing materials.