Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (03): 26-32.doi: 10.13475/j.fzxb.20190202707

• Fiber Materials • Previous Articles     Next Articles

Preparation and piezoelectric properties of polyacrylonitrile/sodium nitrate nanofiber membrane

WU Heng1, JIN Xin1(), WANG Wenyu2, ZHU Zhengtao2,3, LIN Tong2,4, NIU Jiarong2   

  1. 1. School of Material Science and Engineering, Tiangong University, Tianjin 300387, China
    2. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    3. Future Fibres Research and Innovation Center, Deakin University, Geelong VIC3217, Australia
    4. Department of Chemistry and Applied Biological Science, South Dakota School of Mines and Technology, Rapid City SD57701, USA
  • Received:2019-02-18 Revised:2019-12-15 Online:2020-03-15 Published:2020-03-27
  • Contact: JIN Xin E-mail:jinxin29@126.com

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Abstract:

In order to improve the piezoelectric properties of polyacrylonitrile (PAN) fiber membranes, sodium nitrate (NaNO3) was doped into PAN, and PAN/NaNO3 fiber membranes were prepared by electrospinning. The effects of NaNO3 content and spinning speed on piezoelectric properties of the electrospun PAN fiber membranes were investigated. The surface morphology, conformation and piezoelectric properties of PAN/NaNO3 fiber membranes were characterized by scanning electron microscopy, infrared spectroscopy, X-ray diffraction, electret nonwoven piezoelectric performance testing system and piezoelectric tester. The results show that doping NaNO3 into PAN can increase the planar zigzag conformation content and decrease the crystal plane spacing, thus affecting the piezoelectric properties of PAN fiber membranes. In particular, when the doping amount of NaNO3 is 0.9% and the spinning speed is 1 000 mm/s, the piezoelectric properties of fiber membranes are improved notably. At the same time, the planar sawtooth conformation content of PAN/NaNO3 fiber membrane is the highest and crystal plane spacing is the smallest. The piezoelectric voltage and current of this PAN fiber membrane are increased by 40% and 174.53% respectively.

Key words: sodium nitrate, polyacrylonitrile fiber membrane, nanofiber membrane, electrospinning, piezoelectric property

CLC Number: 

  • TB34

Fig.1

Sketch of electrospinning device"

Fig.2

Piezoelectric element diagram"

Fig.3

Principle diagram of piezoelectric measurement"

Fig.4

SEM images of PAN fiber membrane doped with different mass fraction of NaNO3(×6 000)"

Fig.5

FT-IR spectra of PAN fiber membrane doped with different mass fraction of NaNO3"

Fig.6

XRD patterns of PAN fiber membrane doped with different mass fraction of NaNO3"

Fig.7

Piezoelectric constants of PAN fiber membrane doped with different mass fraction of NaNO3"

Tab.1

Piezoelectric performance of PAN fiber membrance doped with different mass fraction of NaNO3"

NaNO3质量分数/% 压电电压/V 压电电流/μA
0 5.40 3.39
0.5 6.58 4.15
0.9 7.10 7.16
1.3 5.10 3.77
1.7 4.65 2.52

Fig.8

SEM images of PAN/NaNO3 fiber membrane at different rotating speed (×6 000)"

Fig.9

FT-IR spectra of PAN/NaNO3fiber membrane at different rotating speeds"

Fig.10

XRD patterns of PAN/NaNO3fiber membrane at different rotating speeds"

Fig.11

Variation of piezoelectric constant of PAN/NaNO3 fiber membrane at different speeds"

Fig.12

Changes of piezoelectric voltage(a)and current(b) of PAN/NaNO3 fiber membrane at different speeds"

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