A new route of fabricating porous polyimide membranes

Jiu-mei Xiao, Xin-chun Shang, Li-ping Qin

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    Jiu-mei Xiao, Xin-chun Shang, and Li-ping Qin, A new route of fabricating porous polyimide membranes, Int. J. Miner. Metall. Mater., 17(2010), No. 6, pp.782-785. https://dx.doi.org/10.1007/s12613-010-0389-2
    Jiu-mei Xiao, Xin-chun Shang, and Li-ping Qin, A new route of fabricating porous polyimide membranes, Int. J. Miner. Metall. Mater., 17(2010), No. 6, pp.782-785. https://dx.doi.org/10.1007/s12613-010-0389-2
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    A new route of fabricating porous polyimide membranes

    • School of Applied Science, University of Science and Technology Beijing, Beijing, 100083, China

    基金项目: 

    This work was financially supported by the National Natural Science foundation of China (No.10772024).

      通信作者:

      Jiu-mei Xiao E-mail: jiujiu@sas.ustb.edu.cn

    中文摘要

    A novel experimental route to fabricate porous polyimide membranes (PPMs) with ideal air permeability was reported. The polymer solution layer consisting of the corresponding polyamic acid (PAA), solvent, and dibutyl phthalate (DBP) with a boiling temperature of 340℃ was treated by a simple process. The polymer solution layer was first treated at a lower temperature (about 150℃), then the received solid membrane was further imidized at a higher temperature (about 270℃), and finally, DBP was removed from the membrane at a temperature above its boiling temperature. The final asymmetric polyimide membrane with a dense skin layer was obtained. To improve the air permeability of the polyimide membranes, the polymer solution layer was treated between two substrates. And the PPMs with open pores on both sides are fabricated and the air permeability of the films is improved greatly.

     

    A new route of fabricating porous polyimide membranes

    Author Affilications

      • School of Applied Science, University of Science and Technology Beijing, Beijing, 100083, China

    • Funds: 

      This work was financially supported by the National Natural Science foundation of China (No.10772024).

    • Received: 06 February 2010; Revised: 19 February 2010; Accepted: 04 March 2010;
    A novel experimental route to fabricate porous polyimide membranes (PPMs) with ideal air permeability was reported. The polymer solution layer consisting of the corresponding polyamic acid (PAA), solvent, and dibutyl phthalate (DBP) with a boiling temperature of 340℃ was treated by a simple process. The polymer solution layer was first treated at a lower temperature (about 150℃), then the received solid membrane was further imidized at a higher temperature (about 270℃), and finally, DBP was removed from the membrane at a temperature above its boiling temperature. The final asymmetric polyimide membrane with a dense skin layer was obtained. To improve the air permeability of the polyimide membranes, the polymer solution layer was treated between two substrates. And the PPMs with open pores on both sides are fabricated and the air permeability of the films is improved greatly.

     

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