Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (12): 34-41.doi: 10.13475/j.fzxb.20210202008

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of polyacrylonitrile/BaTiO3 composite nanofibrous filter membrane

JIA Lin1(), WANG Xixian1, LI Huanyu1, ZHANG Haixia1, QIN Xiaohong1,2   

  1. 1. College of Textiles Engineering, Henan University of Engineering, Zhengzhou, Henan 450007, China
    2. College of Textiles, Donghua University, Shanghai 201620, China
  • Received:2021-02-07 Revised:2021-08-19 Online:2021-12-15 Published:2021-12-29

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Abstract:

In order to prepare nanofibrous filter membrane with high filter efficiency and low resistance, BaTiO3 nano-particles were added into polyacrylonitrile(PAN) solution to prepare PAN/BaTiO3 composite nanofibrous filter membrane using electrospinning technology, and the surface morphology, chemical structure, water contact angle, mechanical properties and filtration properties of the membrane were analyzed. The results showed that PAN/BaTiO3 composite nanofibers possess smaller fiber diameter compared to pure PAN nanofibers. Elemental mapping images showed that BaTiO3 nano-particles were dispersed in the nanofibers uniformly. Compared with pure PAN nanofiber, the water contact angles of PAN/BaTiO3 nanofibrous composite filter membrane were larger, hence their anti-pollution abilities were stronger. The maximum tensile strength of PAN/BaTiO3 nanofiber composite filter membrane increased by 75.5%. When the mass fraction of BaTiO3was 0.75%, the filtration efficiency of composite fiber filter membrane was 98.9%, the resistance pressure drop was 42.7 Pa, the maximum quality factor is 0.105 6, and the percentage of electrostatic adsorption effect in the total filtration effect was 36.2%, reaching the optimal filtration performance. It was also found that such membrane can be used repeatedly to some extent.

Key words: BaTiO3, polyacrylonitrile, electrospinning, nanofiber, electret, filter property

CLC Number: 

  • TS102.6

Fig.1

SEM images of PAN/BaTiO3 composite nanofibrous filter membranes(×10 000)"

Fig.2

O elemental mapping images of PAN/BaTiO3 composite nanofibrous filter membranes"

Fig.3

FT-IR spectra of PAN/BaTiO3 composite nanofibrous filter membranes"

Fig.4

Water contact angle of PAN/BaTiO3 composite nanofibrous filter membranes"

Fig.5

Stretch curves of PAN/BaTiO3 nanofibrous filter membranes"

Fig.6

Filter property of PAN/BaTiO3 composite nanofibrous filter membranes with different electrospinning time"

Fig.7

Air permeability and water vapor permeability of PAN/BaTiO3 composite nanofibrous filter membranes"

Fig.8

Surface potential of PAN/BaTiO3 composite nanofibrous filter membranes with different standing time"

Fig.9

Mechanical filter property of PAN/BaTiO3 composite nanofibrous filter membranes"

Fig.10

Filter efficiency of PAN/BaTiO3 composite nanofibrous filter membranes with different standing time"

Fig.11

Morphologies of PAN/BaTiO3 composite nanofibrous membrane before (a)and after(b) immersion in distilled water(×5 000)"

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