HIGH-TEMPERATURE FILTERING MATERIAL OF ELECTROSPUN POLYIMIDE NANOFIBERS

摘要

A high-temperature filtering material of electrospun polyimide nanofibers. The filtering material is prepared by means of the following method: providing a first ODA raw material; dissolving the first ODA raw material in a DMAc solvent so as to obtain a first solution; adding PMDA and a phthalic anhydride to the first solution so as to obtain a second solution; stirring the second solution and subjecting same to a water bath so as to obtain a first PAA solution; adding the first PAA solution to an injector, and forming a first PAA non-woven fabric fiber layer on a substrate by using an electrostatic spinning method; providing a second ODA raw material; dissolving the second ODA raw material in the DMAc solvent so as to obtain a third solution; adding BTDA to the third solution so as to obtain a second PAA solution; adding the second PAA solution to an injector, and forming a second PAA fiber layer on the first PAA fiber layer by using the electrostatic spinning method so as to obtain a fiber laminate; subjecting the fiber laminate to a thermal imidization treatment; and carrying out a heat treatment on the fiber laminate, which has been subjected to the thermal imidization treatment.