polyacrylonitrile -based hollow fiber membrane on the surface of the modified method is initiated . ; the surface modification process of the hollow fiber membranes of polyacrylonitrile -based according to the present invention , (1) was equipped with a nitrile-based hollow fiber membrane polyacrylonitrile in the reactor , comprising: an atmospheric-pressure plasma treatment ; (2) the " step (1) ' reacting the oxygen gas to the hollow fiber membrane subjected to the process of ; And (3) the " phase (2) , by reacting a gaseous mixture of fluorine and an inert gas in a hollow fiber membrane passed through , the surface of the nitrile-based hollow fiber membrane in the step of modification with the hydrophilic polyacrylamide ; including made .
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