CelluXtreme uses a patented technology for spinning strong, stiff and tough natural fibrEs

Water-based process
Using a patented microfluidic flow-focusing technique, we spin a continuous gel-thread with a very high control of the internal structure from a nanocellulose dispersion. This gel thread is subsequently dried into a fibre. The technology is water-based and allows modifications of fibre surface and bulk to provide additional functionality such as, e.g. conductivity or bioactivity.
100% Cellulose
Nanocellulose is one of Nature's high-performance nanoscale structural building blocks. It has extraordinary mechanical properties and can be industrially extracted from plants, often wood pulp. The key to the excellent properties of our spun fibres is that we are able to transfer the extraordinary properties of the nanoscale component into an engineering material concept.

Strongest Biobased fiber ever made

The CelluXtreme technology are the result of research conducted at KTH and RISE, especially within the Wallenberg Wood ScienceCenter.

The spun fibres typically have a cylindrical shape and a diameter in the range of 5-20 µm.

The fibre properties can be tuned by changing the process parameters, from very stiff to a combination of stiffness and toughness.


2009 Wallenberg Wood Science Center is started at KTH and Chalmers trough funding provided by Knut and Alice Wallenberg Foundation
2012 As a result of the scientific collaboration between experts in multiphase flows and fibre and colloid science a new technique is invented and a patent application is sent in.
2014 The use of the technique is published in Nature Communications, and an example of functionalisation for electrical conductivity is presented in ACS Nano, the number one scientific journal in the field of nanotechnology. The results get worldwide attention.
2017 After further process development the properties are improved and it is shown how the spun fibres can be functionalised using spider silk to obtain increased toughness and bioactivity, the results are published in ACS Nano. Again the results get a wider attention since it successfully shows a route for making use if the unique properties of silk in an engineering material that has the potential for industrial scaleup.
2018 By extending out knowledge on nanocellulose preparation and optimal process conditions, it is possible to spin even stiffer and stronger fibres, including results that show that the fibres can regain stiffness after plastic deformation under mechanical load, results that were published in ACS Nano, and with an even stronger impact, which also resulted in appearances in media, e.g. BNN Bloomberg, P.M. Wissen on Servus TV in Austria and ZDF Heute in Germany.
2021 Continued research on optimal process conditions and means of controlling nanoscale assembly resulted in an invitation to elucidate the challenges as a review article in Advanced Materials.

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