METHOD OF PRODUCING CARBON FIBRE MATERIALS FROM VISCOSE FIBRES Russian patent published in 2013 - IPC D01F9/16 D01F9/12 

FIELD: chemistry.

SUBSTANCE: method involves treating viscose fibre material with pyrolysis catalysts, heating to carbonisation temperature and subsequent graphitation to temperature of 3000°C in an inert medium. Carbonisation is preceded by preparation of precursor by preliminary washing of the starting material with water and/or 5-10% sodium hyposulphite solution with heating and drying, and/or ionising irradiation with a beam of fast electrons during transportation through the irradiation chamber of an electron accelerator, and/or warm-wet synthesis of a complex catalyst on the surface of viscose fibres and in the pore system thereof in boiling 10-20% aqueous ammonium chloride solution and with addition of diammonium phosphate in ratio of 0.5-4.0, followed by steaming in hot steam and final ventilated drying with constant transportation, which enables to deposit the catalyst in form of an amorphous film.

EFFECT: high stability of the process of carbonising viscose fibre material and improved physical and mechanical properties of the obtained carbon material.

6 cl, 7 dwg, 1 tbl, 12 ex