Disclosed herein are a polyamic acid dope solution composition, a method
for preparing a hollow fiber using the composition and a hollow fiber
prepared by the method. More specifically, disclosed are a method for
preparing a hollow fiber, comprising preparing a polyamic acid dope
solution composition comprising polyhydroxyamic acid, polythiolamic acid
or polyaminoamic acid, spinning the composition to prepare a hollow
fiber, and imidizing and thermally rearranging the hollow fiber, and the
hollow fiber prepared by the method.
In accordance with the method, a hollow fiber made of a high free volume
polymer membrane can be prepared by spinning the dope solution
composition to prepare a hollow fiber and thermally rearranging the
hollow fiber via thermal treatment. The hollow fiber thus prepared
exhibits excellent gas permeability and selectivity, thus being suitable
for use as a gas separation membrane.