| 主权项 |
1. A gas separation membrane, comprising:
a polyimide structure that contains a repeating unit represented by general formula (1): wherein R1 is a divalent organic group and R2 is a tetravalent organic group; and wherein R1 is a divalent organic group represented by general formula (2): wherein Raa is a single bond, an oxygen atom, a sulfur atom, —SO2— group, —CH2 group, —C(═O)— group, —C(CH3)2— group, —C(CH3)(CH2CH3)— group, —C(CF3)2— group, —CH(CH3)— group, —CH(OH)— group, —NH— group or a divalent organic group formed by removing any two hydrogen atoms from a C3-C12 alicyclic hydrocarbon or C6-C25 aromatic hydrocarbon; wherein HFIP represents a —C(CF3)2OH group; wherein “p” and “q” mutually independently represent an integer of 0 to 2 such that 1≦p+q≦4; wherein a straight line that intersects with a wiggly line represents a bonding moiety; or R1 is a divalent organic group represented by general formula (3): wherein Rba is a single bond, an oxygen atom, a sulfur atom, —SO2— group, —CH2— group, —C(═O)— group, —C(CH3)2— group, —C(CH3)(CH2CH3)— group, —C(CF3)2— group, —CH(CH3)— group, —CH(OH)— group, —NH— group or a divalent organic group formed by removing any two hydrogen atoms from a C3-C12 alicyclic hydrocarbon or C6-C25 aromatic hydrocarbon; wherein HFIP represents a —C(CF3)2OH group; wherein “r” and “s” mutually independently represent an integer of 0 to 2 such that 1≦r+s4; and wherein a straight line that intersects with a wiggly line represents a bonding moiety. |
