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Stretchable and highly sensitive braided composite yarn@polydopamine@polypyrrole for wearable applications

journal contribution
posted on 2019-02-01, 00:00 authored by J Pan, M Yang, L Luo, A Xu, Bin TangBin Tang, D Cheng, G Cai, X Wang
Flexible wearable devices for various applications have attracted research attention in recent years. To date, it is still a big challenge to fabricate strain sensors with a large workable strain range while maintaining their high sensitivity. Herein, we report the fabrication of highly sensitive wearable strain sensors from braided composite yarns (BYs) by in situ polymerization of polypyrrole (PPy) on the surface of yarns after polydopamine templating (BYs-PDA). The electromechanical performance and strain sensing properties of the fabricated braided composite yarn@polydopamine@polypyrrole (BYs-PDA-PPy) were investigated. Because of the unique braided structure of BYs, the BYs-PDA-PPy strain sensors exhibit fascinating performance, including a large workable strain range (up to 105% strain), high sensitivity (gauge factor of 51.2 in strain of 0%-40% and of 27.6 in strain of 40%-105%), long-term stability and great electrical heating performance. Furthermore, the BYs-PDA-PPy sensors can be used in real-time monitoring subtle and large human motions. The BYs-PDA-PPy strain sensors can also be woven into fabrics for large area electric heating. These results demonstrate the potential of BYs-PDA-PPy in wearable electronics.

History

Journal

ACS applied materials and interfaces

Volume

11

Issue

7

Pagination

7338 - 7348

Publisher

ACS Publications

Location

Washington, D.C.

ISSN

1944-8244

eISSN

1944-8252

Language

eng

Publication classification

C1 Refereed article in a scholarly journal