FIELD: chemistry.
SUBSTANCE: method involves preparing a spinning solution containing, in an aprotic solvent, 20-25 wt % polyamide imide and 5-15 wt % organic compound selected from a group comprising benzotriazole, benzoimidazole and imidazole. A dry-and-wet method is used to form hollow fibre from said solution. The fibre is washed and dried. Subsequent heat treatment is carried out at temperature not higher than 360°C.
EFFECT: invention enables to obtain hollow fibre based on polyamide imide, having improved strength properties and selectivity with respect to separated gases - nitrogen and oxygen.
3 cl, 2 dwg, 1 tbl, 9 ex
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