METHOD FOR THE PRODUCTION OF LIGNIN-CONTAINING PRECURSOR FIBRES AND ALSO CARBON FIBRES

摘要

The invention relates to a method for the production of a precursor for the production of carbon- and activated carbon fibres according to the wet- or air-gap spinning method, in which a solution of lignin and a fibre-forming polymer in a suitable solvent is extruded through the holes of a spinning nozzle into a coagulation bath, the formed thread is stretched and subsequently treated, dried at an elevated temperature and then wound up. The lignin-containing thread is an economical starting material for the production of carbon- and activated carbon fibres.

主权项

1. A method for the production of a lignin-containing precursor fibre, for the production of carbon fibres and/or activated carbon fibres, in which
a) a solution, comprising at least one sort of lignin and also at least one fibre-forming polymer selected from the group consisting of polyacrylonitrile and/or polyacrylonitrile-copolymers in at least one solvent, b) is transferred into a coagulation bath by extrusion of the solution through a spinning nozzle by the wet spinning or the air-gap spinning method, the lignin-containing precursor fibre precipitating.