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Extrude lignin to fibers

In our test bed for lignin-based carbon fibre, we can extrude (spin) lignin into fibres (filaments) and convert those to carbon fibres.

test_bed

We have two different extruders for spinning of lignin fibres:
In the monofilament extruder, small quantities of material are used in order to screen the proccesability of the lignin.
For larger quantities we have a multifilament extruder that can spin up to 80 filaments.

The lignin fibres are converted into carbon fibres via several heat treatment steps (see figure above). Today the conversion is done in batches, where stress can be applied to the fibres during the heat treatment in our specially designed equipment.

Currently, we are also designing equipment where the stabilization and carbonisation can be performed (semi-) continuously.

The mechanical properties of the fibres can be determined between each treatment step and their chemical composition and the visual appearance can be determined.

It also possible to convert other materials than lignin in our test bed facility. So far lignin has been the major raw material, but cellulose has also been converted.

We are also planning for a larger pilot plant facility for continuous conversion of lignin into carbon fibre.

Spinning equipment:
Monofilament-extruder (Xplore Instruments), 15 g materialMultifilament-extruder (AJA Inc.), 0.5-2 kg materialTube furnaces for carbonisation (≤1700°C)

Analyses:
DMA 
TMA 
TGA 
DSC 
Rheometer 
Melting microscopy 
Mechanical tester (Diastron) 
Light microscopy 
SEM 

Contact

Sverker Danielsson
+46 8 676 7366
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