Title:
HIGH-TEMPERATURE FILTERING MATERIAL OF ELECTROSPUN POLYIMIDE NANOFIBERS
Document Type and Number:
WIPO Patent Application WO/2020/006832
Kind Code:
A1
Abstract:
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.
Inventors:
HUANG QIAN (CN)
Application Number:
PCT/CN2018/102050
Publication Date:
January 09, 2020
Filing Date:
August 24, 2018
Export Citation:
Assignee:
HUANG QIAN (CN)
International Classes:
B01D39/14; B01D46/02; C08G73/10; D04H1/4334; D04H1/728
Foreign References:
CN103191604A | 2013-07-10 | |||
CN105019141A | 2015-11-04 | |||
CN102251307A | 2011-11-23 | |||
CN108102131A | 2018-06-01 | |||
CN105576176A | 2016-05-11 | |||
JP2011132611A | 2011-07-07 |
Attorney, Agent or Firm:
BEIJING TIAN QI ZHI XIN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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