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Journal of Nanomaterials
Volume 2010, Article ID 842831, 6 pages
Research Article

Polyamic Acid Nanofibers Produced by Needleless Electrospinning

1Nonwoven Department, Textile Engineering Faculty, Technical University of Liberec, Halkova 6, 461 17 Liberec, Czech Republic
2Department of Polymers, Institute of Chemical Technology, Technicka 5, 166 28 Prague 6, Czech Republic

Received 17 March 2010; Accepted 16 June 2010

Academic Editor: Xiaogong Wang

Copyright © 2010 Oldrich Jirsak et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The polyimide precursor (polyamic acid) produced of -oxydiphthalic anhydride and -oxydianiline was electrospun using needleless electrospinning method. Nonwoven layers consisting of submicron fibers with diameters in the range about 143–470 nm on the polypropylene spunbond supporting web were produced. Filtration properties of these nanofiber layers on the highly permeable polypropylene support—namely filtration effectivity and pressure drop—were evaluated. Consequently, these polyamic acid fibers were heated to receive polyimide nanofibers. The imidization process has been studied using IR spectroscopy. Some comparisons with the chemically identical polyimide prepared as the film were made.