PREPARATION METHOD FOR HOLLOW CARBON FIBER USING SUPERCRITICAL FLUID

摘要

PURPOSE: A method for fabricating a hollow carbon fiber is provided to obtain the carbon fiber with a desired diameter and to production cost by only changing a spinneret. CONSTITUTION: A method for fabricating a hollow carbon fiber comprises: a step of melt-spinning an acrylonitrile-based polymer using a supercritical fluid as a plasticizer; a step of drawing the spun fiber and to prepare a hollow precursor fiber; and a step of stabilizing and carbonizing the precursor fiber. The acrylonitrile-based polymer contains 90 wt% or more of an acrylonitrile unit.