Artist´s impression of the production of ultra-strong cellulose fibres: The cellulose nano fibrils flow through a water channel and become accelerated by the inflow of additional water jets from the sides. The acceleration lets all fibrils align with the direction of flow, finally locking together as a strong fibre. Credit: DESY/Eberhard Reimann
“Our filaments are stronger than both aluminium and steel per weight,”
A Swedish-German research team has successfully tested a new method for the production of ultra-strong cellulose fibres at DESY‘s research light source PETRA III. The novel procedure spins extremely tough filaments from tiny cellulose fibrils by aligning them all in parallel during the production process.
“Our filaments are stronger than both aluminium and steel per weight,” emphasizes lead author Prof. Fredrik Lundell from the Wallenberg Wood Science Center at the Royal Swedish Institute of Technology KTH in Stockholm. “The real challenge, however, is to make bio based materials with extreme stiffness that can be used in wind turbine blades, for example. With further improvements, in particular increased fibril alignment, this will be possible.”
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