| 摘要 |
PROBLEM TO BE SOLVED: To provide an unsymmetrical hollow membrane for gas separation having an improved gas permeability performance and a practical mechanical strength, and a method for gas separation using the same. SOLUTION: The unsymmetrical hollow fiber membrane for gas separation comprises a soluble aromatic polyimide having a specific repeating unit wherein a tetracarboxylic acid component is derived from a diphenylhexafluoropropane structure and a biphenyl structure, and a diamine component is derived from diaminodibenzothiophene, a diaminodibenzothiophene-5, 5-dioxide, a diaminothioxanthene-10, 10-dione or a diaminothioxanthene-9, 10, 10-trione and a diaminobenzoic acid. COPYRIGHT: (C)2010,JPO&INPIT |
