Fibers and Polymers

, Volume 18, Issue 4, pp 749–757 | Cite as

Three-layer composite filter media containing electrospun polyimide nanofibers for the removal of fine particles

  • Lei Li
  • Leiming Shang
  • Yanxiang Li
  • Chuanfang Yang
Article

Abstract

Polyimide (P84) nanofibers of 200-500 nm were deposited uniformly on needle punched aramid felt with basis weight of 260-350 g/m2 by optimized electrospinning. High temperature adhesive was then electro-sprayed on the nanofiber side deliberately to bind a thin protective layer made of temperature-resistant non-wovens. The three layer structure was afterwards enforced by hot pressing to form composite filter media. The application of the adhesive was tailored not to affect the permeability of the substrate felt while exerting adhesion strength of over 1000 kPa for the media to be suitable for flue gas dust treatment under 240 ºC. When 0.3-10 μm NaCl aerosols were used as the simulated dusts, it was found that even a small amount of P84 nanofibers could obviously elevate the filtration efficiency. The composite showed 100 % removal efficiency of particles equal and greater than 2.0 μm, and 99.5 % for particles 1.0-2.0 μm in diameter.

Keywords

Electrospinning Polyimide Filtration efficiency Nanofibers Composite media 

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Copyright information

© The Korean Fiber Society and Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  • Lei Li
    • 1
  • Leiming Shang
    • 1
    • 2
    • 3
  • Yanxiang Li
    • 1
  • Chuanfang Yang
    • 1
  1. 1.Key Laboratory of Green Process and Engineering, Institute of Process EngineeringChinese Academy of SciencesBeijingChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.Huawei Technologies Co., Ltd.ShenzhenChina

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