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Issue 4, 2020
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Transforming commercial regenerated cellulose yarns into multifunctional wearable electronic textiles

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Abstract

Textile-based electronics hold great promise as they can endow wearable devices with soft and comfortable characteristics. In this work, a multifunctional conductive yarn was fabricated by coating a commercial regenerated cellulose (lyocell) yarn with polypyrrole (PPy). The method is simple, low-cost, and highly scalable and it endows the common lyocell yarn with flame-retardant as well as good electrical heating properties and excellent electrochemical performance. The PPy-coated lyocell yarn (PCLY) behaved as a regular yarn and could be hand-knitted into a full fabric. The PCLY fabric demonstrated high conductivity, allowing its use as a wearable Joule heater. The polypyrrole coating significantly improved the limiting oxygen index (LOI) of the lyocell yarn from 21.7% to 40.2%, endowing the yarn with an excellent flame-retardant property. PCLY was stitched into a fabric to form interdigitated electrodes and further assembled into flexible textile micro-supercapacitors. The resulting device with 10 interdigitated electrodes exhibited high areal specific capacitance of 663 mF cm−2 and energy density of 21.6 μW h cm−2 at 1 mA cm−2. Furthermore, six devices in series could power a blue light-emitting-diode (LED) of 3 V for more than 30 seconds. This facile fabrication provides novel and practical insights toward wearable textile-based electronics.

Graphical abstract: Transforming commercial regenerated cellulose yarns into multifunctional wearable electronic textiles

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Supplementary files

Article information


Submitted
17 Oct 2019
Accepted
23 Nov 2019
First published
26 Nov 2019

J. Mater. Chem. C, 2020,8, 1309-1318
Article type
Paper

Transforming commercial regenerated cellulose yarns into multifunctional wearable electronic textiles

J. Lv, Y. Dai, H. Xu, Y. Zhong, L. Zhang, Z. Chen, X. Sui, X. Feng, B. Wang and Z. Mao, J. Mater. Chem. C, 2020, 8, 1309
DOI: 10.1039/C9TC05673D

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