| abstract |
A preparation method for a triptyl polyimide separation membrane, said method comprising preparation steps of: dissolving a triptycene compound containing an active group and a dianhydride compound in an aprotic solvent to perform a polymerization reaction, and performing an imidization treatment; pouring the polymer solution obtained by the reaction into a precipitating solution, and performing vigorous stirring, suction filtration, washing, and drying, so as to obtain triptyl polyimide powder; and dissolving the triptyl polyimide in a solvent to form a film casting solution, coating a support with the film casting solution and drying same, so as to obtain a triptyl polyimide separation membrane. |