Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (01): 1-8.doi: 10.13475/j.fzxb.20180101308

• Fiber Materials •     Next Articles

Preparation and properties of amphiphobic polyacrylonitrile electrospun nanofiber films

TONG Wei1,2,3,4, FANG Ruxian1,2,3,4, LI Jiawei1,2,3,4, YI Lingmin1,2,3,4()   

  1. 1. Silk Institute, College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. Institute of Advanced Functional Coatings, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    3. Key Laboratory of Advanced Textile Materials & Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    4. Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2018-01-04 Revised:2018-09-25 Online:2019-01-15 Published:2019-01-18
  • Contact: YI Lingmin E-mail:lmyi@zstu.edu.cn

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Abstract:

In order to prepare amphiphobic fiber materials with good wear resistance for oil/water or oil/oil separation, amphiphobic polyacrylonitrile (PAN) nanofiber materials were prepared by using PAN electrospun nanofibers as the substrate, and dopamine (DA) and tridecafluorooctyltriethoxy-silane (G617) as the surface treatment agent. The effects of various electrospinning process factors, DA and G617 content on the surface morphology and hydrophobic/oleophobic properties of PAN electrospun films were investigated by scanning electron microscopy, contact angle measuring instrument, X-ray photoelectron spectroscopy and so on. The results show that when the mass ratio of PAN in spinning solution is 13.8% and the spinning voltage is 18 kV, the fiber morphology is the best. And the ethylene glycol contact angle, the toluene contact angle, the water contact angle and the salad oil contact angle of the modified PAN electrospun films can be 135.1°, 0°, 141.9° and 131.2°, respectively. Moreover, the water or salad oil contact angle of the modified PAN electrospun films can be larger than 125° after 20 cycles of abrasion test. The results show that the modified PAN electrospun films exhibit good properties in the separation of water/toluene, toluene/ethylene glycol and toluene-water emulsion.

Key words: electrospinning, polyacrylonitrile, nanofiber film, dopamine modification, oil/water separation, oil/oil separation

CLC Number: 

  • TQ340.649

Fig.1

SEM images of electrospun films obtained from different mass ratios of PAN(×2 000)"

Fig.2

SEM images of PAN electrospun nanofibers prepared under different electrospinning voltages(×2 000)"

Fig.3

SEM images of modified PAN electrospun films with different mass concentrations of DA(×2 000)"

Fig.4

Static contact angles of PAN electrospun films modified with different mass concentrations of G617."

Fig.5

SEM images of electrospun films (×2 000)."

Fig.6

FT-IR spectra of pure PAN film, and PAN films pretreatedy DA and modified by G617"

Tab.1

Elemental percentage of electrospun films surfaces%"

样品名称 C1s N1s O1s F1s Si2p
PAN膜 73.44 17.49 9.07 0.00 0.00
DA预处理PAN膜 65.43 7.76 26.81 0.00 0.00
G617改性PAN膜 36.50 1.62 9.65 48.32 3.90

Fig.7

XPS survey spectra of pure PAN film, and PAN films pretreated by DA pretreatment and modified by G617"

Fig.8

Static contact angles of modified PAN electrospun films after friction"

Fig.9

SEM images of modified PAN films after 50 times of friction(×2 000)"

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