| 摘要 |
<p>[Problem] Diamine and carboxylic dianhydride for polymerizing a hexafluoroisopropylidene group-containing polyimide are limited in chemical structure when developed into a polyimide membrane, so that it is difficult to design a chemical structure with consideration paid to the strength and separation performance of a gas separation membrane. A gas separation membrane easily soluble in an organic solvent, excellent in formability so as to be readily usable for a gas separation membrane, and excellent in gas separation performance is obtained. [Solution] A gas separation membrane, including:
a polyimide that contains a repeating unit represented by general formula (1).
[In the formula (1), R 1 is a divalent organic group and R 2 is a tetravalent organic group, R 1 containing a 2-hydroxy-1,1,1,3,3,3-hexafluoroisopropyl group (-C(CF 3 ) 2 OH).]</p> |
