FIELD: chemistry of polymers. SUBSTANCE: method ensures to prepare polymeric fibrous hemosorbent showing increased sorption of immunoglobulins (12.9-922 mg/g) and decreased hemolysis (3.6-14.9%). Method involves treatment of fiber made of acrylonitrile copolymer containing 0.20-0.75 mmole/g carboxylic groups and 8-17 wt.-% epoxy groups with 1-10% diethylamine aqueous solution at 30-50 C for 10-30 min. EFFECT: increased effectiveness of hemosorbent, improved method of preparing. 1 tbl
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