Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (05): 8-14.doi: 10.13475/j.fzxb.20181105807

• Fiber Materials • Previous Articles     Next Articles

Preparation of polyacrylonitrile/cellulose acetate/TiO2 composite nanofiber membrane and its photocatalytic degradation performance

QIAN Yifan1,2, ZHOU Tang3, ZHANG Liying2,4, LIU Wanshuang2,4, FENG Quan3()   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China
    3. Anhui Provincial Key Laboratory of Textile Fabric, Anhui Polytechnic University, Wuhu, Anhui 241000, China
    4. Shanghai Collaborative Innovation Center for High Performance Fiber Composites, Donghua University, Shanghai 201620, China
  • Received:2018-11-21 Revised:2020-01-06 Online:2020-05-15 Published:2020-06-02
  • Contact: FENG Quan E-mail:wdyu@dhu.edu.cn

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Abstract:

In order to investigate the photocatalytic degradation of composite nanofiber membrane before and after alkali modification, the polyacrylonitrile/cellulose acetate/nano-titanium dioxide (PAN/CA/TiO2) composite nanofibers membrane were first prepared using the electrospinning technology, which was then alkaline treated with 0.05 and 0.10 mol/L NaOH solution respectively to achieve polyacrylonitrile/regenerated cellulose (PAN/RC/TiO2) composite nanofiber membranes. Scanning electron microscopy observation, Fourier transform infrared spectroscopy analysis and static contact angle measurement were used to characterize the mechanical and photocatalytic degradation of the composite nanofiber membrane. The results show that after the alkali treatment, the static contact angle of the composite nanofiber membrane are reduced from 125.3°to 10.2°, the hydrophilic property is greatly improved. The degradation rate of PAN/RC/TiO2 composite nanofiber membrane to MB solution reaches 91.2%, while the degradation rate of blank solution to MB solution is only 10.1%. After 3 repeated uses, the degradation rate caused by the MB solution still reaches 74.7%.

Key words: dye wastewater treatment, electrospining, titanium oxide, nanofibers, photocatalysis

CLC Number: 

  • TQ619.2

Fig.1

Self-made electrospinning device schematic"

Fig.2

SEM images of nanofibers"

Tab.1

Mechanical properties of composite nanofibers before and after modification"

样品 断裂强度/MPa 伸长率/%
PAN/CA 125.61 22.39
PAN/RC 95.70 21.20
PAN/CA/1%TiO2 124.54 20.30
PAN/RC/1%TiO2 87.62 19.80

Fig.3

FT-IR spectra of composite nanofibers"

Tab.2

Static contact angle of composite nanofibers before and after modification"

样品 接触角/(°)
PAN/CA 125.30
PAN/RC 10.20
PAN/CA/1%TiO2 119.10
PAN/RC/1%TiO2 8.72

Fig.4

Curves of photocatalytic degradation of MB by composite nanofibers. (a) Before modification; (b) After modification"

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