METHOD OF PRODUCING CARBON FIBER MATERIAL Russian patent published in 2013 - IPC D01F9/16 D06M15/643 

FIELD: textiles, paper.

SUBSTANCE: method of producing carbon fiber material comprises treatment of the starting hydrocellulose fiber material in a solution containing 5-7 wt % liquid oligomeric resins corresponding to the general formula: HO{[MeSi(OH)O][Me₂SiO]_m}_nH, where Me is methyl; m and n are integer or fractional numbers: m=1-3, n=3-10 with a molecular weight from 900 to 2400. As the solvent of the oligomeric resins, a composition is used based on compounds of general formula: (SiO)_xC_yH_z, where 3≤x≤5, y=2x, z=3y. The impregnated hydrocellulose material is dried at a temperature of (150-170)°C, thermally relaxed in the mode of relaxation shrinkage at a temperature of (180-200)°C, the carbonisation is carried out during deformation from (-25)% to (+30)% and finished at a temperature of 700°C, the subsequent high-temperature treatment is carried out at a temperature up to 2500°C at a degree of deformation of (-10)% to (+30)%.

EFFECT: improvement of physical and mechanical properties of carbon fiber material in creation of an environmentally safe technological process.

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