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Frontiers of Materials Science

ISSN 2095-025X

ISSN 2095-0268(Online)

CN 11-5985/TB

Postal Subscription Code 80-974

2018 Impact Factor: 1.701

Front. Mater. Sci.    2019, Vol. 13 Issue (3) : 305-313    https://doi.org/10.1007/s11706-019-0472-1
RESEARCH ARTICLE
Wearable gas/strain sensors based on reduced graphene oxide/linen fabrics
Xia HE1(), Qingchun LIU2, Jiajun WANG1, Huiling CHEN1
1. School of Art and Design, Zhejiang Sci-Tech University, Hangzhou 310018, China
2. School of Art Design, Zhejiang A&F University, Hangzhou 311300, China
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Abstract

Multifunctional wearable e-textiles have been a focus of much attention due to their great potential for healthcare, sportswear, fitness, space, and military applications. Among them, electroconductive textile yarn shows great promise for use as the next-generation flexible sensors without compromising properties and comfort of usual textiles. Recently, a myriad of efforts have been devoted to improving performance and functionality of wearable sensors. However, the current manufacturing process of metal-based electroconductive textile yarn is expensive, unscalable, and environmentally unfriendly. In this work, we report the preparation of multifunctional reduced graphene oxide/linen (RGO/LN) fabrics through the reduction and the followed suction filtration. As-prepared RGO/LN fabric could serve as the methane gas sensor, which exhibited high sensitivity, remarkable reliability and feasibility. Furthermore, the RGO/LN fabric sensor exhibited good moisture permeability and air permeability. The present work reveals that RGO/LN fabric has great potential as wearable smart devices in personal healthcare applications.

Keywords wearable sensor      reduced graphene oxide      linen fabric      methane     
Corresponding Author(s): Xia HE   
Online First Date: 30 August 2019    Issue Date: 29 September 2019
 Cite this article:   
Xia HE,Qingchun LIU,Jiajun WANG, et al. Wearable gas/strain sensors based on reduced graphene oxide/linen fabrics[J]. Front. Mater. Sci., 2019, 13(3): 305-313.
 URL:  
https://academic.hep.com.cn/foms/EN/10.1007/s11706-019-0472-1
https://academic.hep.com.cn/foms/EN/Y2019/V13/I3/305
Fig.1  (a) Molecular structures of GO and RGO. (b) Digital photos of RGO/LN fabric samples.
Fig.2  The preparation process of RGO/LN fabrics.
Fig.3  TEM images of (a) GO and (b) RGO.
Fig.4  EDX spectra of (a) GO and (b) RGO.
Fig.5  SEM images of (a)(b) pure LN fabric, (c)(d) GO/LN fabric (GO-100), and (e)(f) RGO/LN fabric (RGO-100).
Fig.6  (a) Raman spectra of GO/LN fabric (GO-100) and RGO/LN fabric (RGO-100). (b) XRD patterns of GO/LN fabric (GO-100) and RGO/LN fabric (RGO-100). (c) Typical stress?strain curves of LN fabric, GO/LN fabric (GO-100) and RGO/LN fabric (RGO-100).
Fig.7  (a) The WVT rates and (b) the air permeability of LN fabric and RGO/LN fabric samples.
Fig.8  Sensitivities of RGO/LN fabric-based sensors to the CH4 gas at different concentrations: (a) RGO-50/LN fabric; (b) RGO-100/LN fabric; (c) RGO-150/LN fabric. Normalized resistance changes of RGO/LN fabrics under different strains: (d) RGO-50/LN fabric; (e) RGO-100/LN fabric; (f) RGO-150/LN fabric.
Fig.9  The Gauge factor of composites under different conditions.
Fig.10  The application of RGO-LN fabrics for the CH4 sensor under 350 cycles: (a) RGO-50/LN fabric; (b) RGO-100/LN fabric; (c) RGO-150/LN fabric. The application of RGO-LN fabrics for the strain sensor under 1000 cycles: (d) RGO-50/LN fabric; (e) RGO-100/LN fabric; (f) RGO-150/LN fabric.
Fig.11  The sensitivity of the RGO-100/LN fabric-based sensor to 200 ppm CH4 gas with laundering cycles.
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