Production of continuous fibre from nanofibres

Details Production of continuous fibre from nanofibres Production of continuous fibre from nanofibres

D - Textiles, Paper

01

F

D01F 1/09 (2006.01) D01F 1/10 (2006.01) D01F 6/04 (2006.01)

Patent

CA 2342151

A process for converting nanofibres to a continuous fibre or yarn is disclosed. The nanofibres such as carbon nanotubes are dispersed in a solution of high molecular weight polyethylene. This solution is spun to a fibre which is subsequently cooled so that the solution gels. This fibre is then stretched to many times its original length and the solvent is removed by extraction or evaporation. The drawing and solvent removal may be carried out in more steps and the order of the treatment may vary. Relatively dilute solution of the polyethylene can be spun a fact which allows high loading of the nanofibres. In the product the nanofibres are essentially aligned along the fibre length due to the very high draw ratios possible in this process. The fibre can be further treated to remove the polyethylene matrix by heating it in an inert atmosphere to about 500 C or the polyethylene can be carbonized thus yielding a fibre of nanofibres in carbon matrix.

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