A polyimide filter membrane, its preparation method and application
A technology of polyimide and filter membrane, which is applied in separation methods, chemical instruments and methods, membrane technology, etc. It can solve the problems of small pore size, fiber shedding, and high retention rate of fine particle pollutants, and achieve compact structure and bond cooperation. The effect of strong force and smooth material surface
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[0033] Correspondingly, the embodiment of the present invention also provides a method for preparing a polyimide filter membrane, comprising the following steps:
[0034] S01. Provide compound B and compound C shown in the following chemical structural formulas (II) and (III) respectively:
[0035]
[0036] S02. Under an inert environment, the compound B and the compound C are heated and polymerized in an organic solvent to obtain a compound A polyimide, and the number average molecular weight of the compound A is 80000-100000, and the reaction formula is as follows:
[0037]
[0038] S03. Prepare a polyimide filter membrane from the polyimide by electrospinning,
[0039] Among them, the for One of the structural formulas.
[0040] Specifically, in the above step S01, the compound B and compound C can be obtained by self-preparation or commercial purchase. Preferably, the compound B is obtained by self-preparation. Specifically, the compound B is prepared by the f...
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