COMPOSITES SCIENCE AND ENGINEERING ›› 2022, Vol. 0 ›› Issue (10): 56-62.DOI: 10.19936/j.cnki.2096-8000.20221028.009

• APPLICATION RESEARCH • Previous Articles     Next Articles

Preparation and performance study of carbonized silk/PDMS/Fe3O4 composite flexible strain/magnetic dual-mode sensors

GONG Yong-qing1,2, LIU Yu-hui1,2, YAN Lei1,2, ZHAO Xue1,2, WU Qi-lin1,2*   

  1. 1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, China;
    2. College of Materials Science and Engineering, Donghua University, Shanghai 201620, China
  • Received:2021-11-02 Online:2022-10-28 Published:2022-11-01

Abstract: The high electrical conductivity carbonized silk fabrics were prepared by using crepe de chine silk as raw materials under high temperature heat treatment, and were combined with polydimethylsiloxane (PDMS) elastomer and Fe3O4 nanoparticles to prepare a flexible magnetic/strain dual-mode sensor. The sensors exhibited stretchability in a strain range of 0%~60%, with a maximum strain sensitivity (GF) of 9.49, and good stability over 200 stretching/recovery process. The addition of Fe3O4endowed the sensor with a response to a small magnetic field below 50 mT. When the addition of Fe3O4was 25wt%, its magnetic field sensitivity (GFm) could reach to 39.73%/T. The sensor could accurately monitor finger bending and magnetic field, realizing dual-mode sensing. Finally, a non-contact magneto-electrical switch was successfully prepared, making the visual magnetic field detection possible.

Key words: silk, carbonized fabric, strain sensing, magnetic sensing, dual-mode sensor, composites

CLC Number: