Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (03): 44-49.doi: 10.13475/j.fzxb.20200305207

Special Issue: Preparation of Nano-fiber and Its Application

• Fiber Materials • Previous Articles     Next Articles

Preparation and piezoelectric properties of carbon nanotubes/polyvinylidene fluoride nanofiber membrane

ZHANG Yike, JIA Fan, GUI Cheng, JIN Rui, LI Rong()   

  1. College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
  • Received:2020-03-23 Revised:2020-11-13 Online:2021-03-15 Published:2021-03-17
  • Contact: LI Rong E-mail:lirong@dhu.edu.cn

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Abstract:

In order to improve the piezoelectric properties of polyvinylidene fluoride (PVDF) nanofiber membrane, carbon nanotubes (CNTs) were introduced in PVDF nanofiber membrane to fabricate CNTs/PVDF nanofiber membrane by electrospinning, and a simple flexible piezoelectric sensor with a sandwich structure was assembled. The effect of the mass fraction of CNTs on the piezoelectric properties of CNTs/PVDF nanofiber membrane was investigated. The morphology, structure, mechanical properties and piezoelectric properties of the nanofibers were characterized by scanning electron microscope, X-ray diffractometer, Fourier transform infrared spectrometer, universal testing machine and digital oscilloscope. The results show that CNTs/PVDF nanofiber membrane has good mechanical properties, and the addition of CNTs into the fiber supports the formation of β crystal type in the crystal structure. When the mass fraction of CNTs is 5%, the content of β crystal type is the highest in the crystal structure of CNTs/PVDF nanofiber, and the piezoelectric performance is the strongest. Under such conditions, the output voltage of the flexible sensor reached the maximum value of 7.5 V.

Key words: polyvinylidene fluoride, carbon nanotubes, flexible sensor, piezoelectric sensor, piezoelectric property, electrospinning, nanofiber membrane

CLC Number: 

  • TP212.9

Fig.1

Schematic diagram of CNTs/PVDF sandwich piezoelectric sensor"

Fig.2

SEM images of CNTs/PVDF nanofiber membrane with different mass fraction of CNTs(×5 000)"

Fig.3

Diameter distribution of CNTs/PVDF nanofibers with different mass fraction of CNTs"

Fig.4

FT-IR spectra of CNTs/PVDF nanofiber membrane with different mass fraction of CNTs"

Fig.5

XRD pattern of CNTs/PVDF nanofiber membrane with different mass fraction of CNTs"

Tab.1

Relative content of β crystals of CNTs/PVDF nanofiber membrane with different mass fraction of CNTs"

CNTs质量分数/% β晶型的相对含量/%
0 52.69
1 58.32
3 68.57
5 80.25
8 74.52
10 60.09

Tab.2

Mechanical properties of CNTs/PVDF nanofiber membrane with different mass fraction of CNTs"

CNTs质量分数/% 断裂应力/MPa 断裂伸长率/%
0 0.929 112.796
1 0.812 113.519
3 1.574 158.686
5 1.185 106.337
8 1.133 95.988
10 1.071 75.695

Fig.6

Piezoelectric response curve of CNTs/PVDF piezoelectric sensor"

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