Patent ID: 8501146
Filing Date: 2013-08-06
Classification: D01D,D01F,Y10T

Abstract:
1. A method for preparing hollow carbon fibers, the method comprising: melt-spinning an acrylonitrile-based polymer having a weight average molecular weight ranging from 200,000 to 500,000 g/mol by using a supercritical fluid as a plasticizer; drawing spun fibers to prepare hollow precursor fibers; and stabilizing and carbonizing the hollow precursor fibers to prepare the hollow carbon fibers, wherein a spinneret used for the melt-spinning has a hollow outer diameter ranging from 0.2 to 0.3 mm, a hollow inner diameter ranging from 0.07 to 0.17 mm, and a spinneret interval ranging from 0.01 to 0.1 mm.