Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (10): 16-23.doi: 10.13475/j.fzxb.20210906708

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of polypyrole/silk fibroin conductive nanofiber membranes

YU Yangxiao1, LI Feng1, WANG Yuyu1, WANG Shanlong1, WANG Jiannan1,2, XU Jianmei1,2()   

  1. 1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215021, China
    2. Key Laboratory of Textile Industry for Silk Products in Medical and Health Use, Soochow University, Suzhou, Jiangsu 215123, China
  • Received:2021-09-06 Revised:2022-03-17 Online:2022-10-15 Published:2022-10-28
  • Contact: XU Jianmei E-mail:xujianmei@suda.edu.cn

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Abstract:

In order to develop tissue regeneration materials with certain electrical conductivity, we prepared silk fibroin nanofiber membranes using electrospinning and further polypyrrole/silk fibroin conductive nanofiber membranes by in-situ oxidative polymerization. The effect of spinning parameters on the surface morphology of nanofiber membrane was studied. The electrical conductivity of nanofiber membrane was tested by the four-point probe. FT-IR spectrometer was used to characterize the chemical structure of nanofiber membrane. The results showed that silk fibroin nanofiber membranes have an even surface with less beads, with an average fiber diameter of (520.70±140.81) nm, when solution concentration was 0.16 g/mL, flow rate 0.2 mL/h, voltage 20 kV, rotating speed 1 000 r/min. Polypyrrole/silk fibroin conductive nanofiber membranes was prepared by in-situ oxidative polymerization, and it retains its original nano fiber structure, and the electrical conductivity is (0.44±0.07) S/cm, when the pyrrole concentration was 0.3 mol/L, dopant concentration 0.3 mol/L, the ratio of fixed pyrrole to oxidant 1∶2, and the polymerization time 6 h.

Key words: polypyrrole, silk fibroin, electrospinning, in-situ oxidative polymerization, conductive nanofiber membrane

CLC Number: 

  • TS101.4

Fig.1

Surface morphology(×3 000) (a) and diameter distribution (b) of silk fibroin nanofiber membranes with different mass concentrations of spinning solution"

Fig.2

Surface morphology(×3 000)(a) and diameter distribution(b) of silk fibroin nanofiber membranes with different flow rates"

Fig.3

Surface morphology(×3 000)(a) and diameter distribution(b) of silk fibroin nanofiber membranes with different voltages"

Fig.4

Surface morphology(×3 000)(a) and diameter distribution(b) of silk fibroin nanofiber membranes with different rotating speeds"

Fig.5

Polymerization process of polypyrrole. (a)Formation of radical cations; (b)Formation of bipyrrole; (c)Formation of bipyrrole radical cations; (d)Formation of polypyrrole long chain; (e)Doping process of polypyrrole"

Fig.6

Interaction between polypyrrole and silk fibroin. (a)Hydrogen bonding interaction; (b)Electrostatic attraction"

Fig.7

Surface morphology of polypyrole/silk fibroin nanofiber membranes with different molar ratios(×2 000). (a) Surfaces in contact with air;(b) Surface in contact with solution"

Fig.8

Electrical conductivity of polypyrole/silk fibroin nanofiber membranes with different molar ratios"

Fig.9

FT-IR spectra of samples"

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