Modified polyacrylonitrile fiber and method of preparing the same

A composition useful for preparing a modified polyacrylonitrile fiber comprising polyacrylonitrile and animal hair micro powder, the composition comprising:

• 49.9-98.9% by weight of an acrylonitrile monomer;
• 0.1-0.4% by weight of an initiator;
• and
• 1.0-50.0% by weight of an animal hair micro powder;
• wherein,
• said acrylonitrile monomer is selected from acrylonitrile, methyl acrylonitrile, and butenenitrile;
• said initiator is a free radical initiator selected from azobisisobutyronitrile, azobisisoheptonitrile, benzoyl peroxide, or a mixture thereof;
• or an oxidation-reduction initiator selected from potassium persulfate-sodium bisulfite, ammonium persulfate-sodium bisulfite, sodium chlorate-sodium bisulfite, sodium hypochlorite - sodium bisulfite, or a mixture thereof;
• and
• said animal hair micro powder is prepared by a mechanical method from natural animal fibers selected from wool, cattle hair, horse hair, rabbit hair, camel hair, yak hair and/or human hair, the average diameter of said animal hair micro powder particles being 0.01-10 μm.