Multifunctional composite fibers with conductive and magnetic properties

Xin Li,Xichang Wang,Yongfu Pei,Sheng Yang,Yongyang Gong ,Rui Wang

doi:10.1177/1558925019850571

Abstract

The composite fibers with conductive and magnetic properties were prepared from the spinning solution consisting of poly(vinyl alcohol), poly(3,4-ethylenedioxythiophene)-poly(sodium-p-styrenesulfonate), and Co-doped Fe3O4 magnetic particles (Co-Fe3O4) via a conventional wet spinning process. The morphology, microstructure, elemental composition, crystallinity, thermal stability, mechanical properties, conductivity, and magnetic properties of the composite fibers were studied. The scanning electron microscopy images showed that the diameters of the composite fibers were in the range of 30–50 μm with a rough surface and reniform cross-section. The energy-dispersive spectra results indicated that the poly(3,4-ethylenedioxythiophene)-poly(sodium-p-styrenesulfonate) particles were mostly distributed on the surface of the composite fiber, while the Co-Fe3O4 magnetic particles mainly existed inside the fiber. The composite fibers were amorphous, but contained a certain crystalline phase, and with the increase of the poly(3,4-ethylenedioxythiophene)-poly(sodium-p-styrenesulfonate) content, the crystallinity of the composite fiber decreased. The conductivity and saturation magnetization of the composite fiber with a Co-Fe3O4 content of 2.68 wt% and poly(3,4-ethylenedioxythiophene)-poly(sodium-p-styrenesulfonate) of 8.6 wt% reached 0.2 S/cm and 1.9 A m2/kg, respectively. Besides, the composite fibers displayed improved thermal stability and good mechanical properties, which are applicable in electromagnetic protection fields.

Highlights

Nowadays, the composite polymers with conductive and magnetic properties have received great attention because of their unique properties and technological applications in electrical, optical, and magnetic materials and devices.[1]
The chemical structure of the fibers was analyzed by a Nexus 670 Fourier transform infrared (FTIR) spectrometer and the scanning rate is 4 cm−1/s in the range of 4000– 400 cm−1
The additional peaks appearing in the composite fibers at 475 and 618 cm−1 correspond to M–O (M = Fe, Co) stretching vibration of magnetic nanoparticles,[23] which is absent in the pure poly(vinyl alcohol) (PVA) fiber. These results indicate that PEDOT-PSS and magnetic particles were successfully compounded with PVA fibers

Summary

Introduction

The composite polymers with conductive and magnetic properties have received great attention because of their unique properties and technological applications in electrical, optical, and magnetic materials and devices.[1]. It was found that the resulting composite fibers with the Co-Fe3O4 content of 2.68 wt% and the PEDOT-PSS content of 8.6 wt% exhibited high conductivity and ferromagnetic properties, excellent thermal stability, and good mechanical properties, which can be applicable in electromagnetic protection fields.

Results

Conclusion