Study on Design and Preparation of Conductive Polyvinylidene Fluoride Fibrous Membrane with High Conductivity via Electrostatic Spinning

Xinhua Zhao; Qian Zhao; Yanjiao Chang; Mingzhuo Guo; Siyang Wu; Hanqi Wang; Yihao Hou; Luyu Zhang; Chang Liu; Han Wu; Yunhong Liang; Luquan Ren

doi:10.3390/polym15153174

Study on Design and Preparation of Conductive Polyvinylidene Fluoride Fibrous Membrane with High Conductivity via Electrostatic Spinning

Polymers (Basel). 2023 Jul 26;15(15):3174. doi: 10.3390/polym15153174.

Authors

Xinhua Zhao¹, Qian Zhao¹, Yanjiao Chang², Mingzhuo Guo¹, Siyang Wu¹, Hanqi Wang¹, Yihao Hou¹, Luyu Zhang¹, Chang Liu¹, Han Wu¹, Yunhong Liang¹, Luquan Ren¹

Affiliations

¹ The Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130025, China.
² College of Food Science and Engineering, Jilin University, Changchun 130062, China.

Abstract

The novel conductive polyvinylidene fluoride (PVDF) fibrous membrane with high conductivity and sensitivity was successfully prepared via electrostatic spinning and efficient silver reduction technology. Based on the selective dissolution of porogen of polyvinylpyrrolidone (PVP), the porous PVDF fibrous membrane with excellent adsorbability and mechanical strength was obtained, providing a structure base for the preparation of conductive PVDF fibrous membrane with silver nanoparticles (AgNPs-PVDF). The Ag⁺ in the AgNO₃ mixed solution with PVP was absorbed and maintained in the inner parts and surface of the porous structure. After the reducing action of ascorbic acid-mixed solution with PVP, silver nanoparticles were obtained tightly in an original porous PVDF fibrous membrane, realizing the maximum conductivity of 2500 S/m. With combined excellent conductivity and mechanical strength, the AgNPs-PVDF fibrous membrane effectively and sensitively detected strain signals of throat vocalization, elbow, wrist, finger, and knee (gauge factor of 23). The electrospun conductive AgNPs-PVDF combined the characteristics of low resistance, high mechanical strength, and soft breathability, which provided a new and effective preparation method of conductive fibers for practical application in wearable devices.

Keywords: conductive fibrous membrane; electrostatic spinning; polyvinylidene fluoride; porous structure; silver particles.

Grants and funding

This work was supported by the National Natural Science Foundation of China (52105302, 52105300), the Natural Science Foundation of Jilin Province (20230101126JC), the Science and Technology Research Project of Jilin Provincial Education Department (JJKH20231197KJ) and the Excellent Young Teacher Training Program of Jilin University.