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Bioinspired lotus fiber-based graphene electronic textile for gas sensing

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Abstract

Graphene electronic textiles (e-textiles) have attracted significant attention in various sensing applications owing to their strong advantages. During the fabrication of these textiles, there are factors to consider, such as electrical conductivity, mechanical flexibility, weight, and applicability in other practical applications. Bioinspired lotus fiber has appropriate advantages to be used as graphene e-textiles, including lightweight (< 1 mg), eco-friendliness, crease-resistant, pilling resistance, and flexibility. However, lotus fiber-based graphene e-textiles have not yet been reported. In this study, we developed a reduced graphene oxide‒coated lotus fiber (RGOLF) which was successfully fabricated by the hydrogen interaction between graphene flakes and cellulose fiber. The higher the GO concentration (~ 3 g/L) and fiber diameter (~ 300 μm), the higher the electrical conductivity of the RGOLF was measured. The RGOLF exhibited a higher electrical conductivity (4.63 ± 0.22 μS) and a remarkable sensing performance for hazardous NO2 gas molecules within a short exposure time (~ 3 min), including a low detection limit (~ 1 ppm), selectivity, and resistance to relative humidity. Moreover, we verified the mechanical flexibility and elasticity of RGOLF through a 1,000-cycle bending test, and tensile test, respectively. These results suggest that the bioinspired RGOLF could be used as a gas sensor in environmental air with a strong potential for use in various wearable applications.

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Acknowledgments

This work was supported by a National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSIP) (No. NRF-2022R1A2C4001990, NRF-2021R1A4A1028969, NRF-2020R1A2C2102262, NRF-2019R1A2B5B01070617, and NRF-2020R1A6A3A01096477). This study was also supported by a Korea University Grant and the BK21 FOUR (Fostering Outstanding Universities for Research). This result was supported by "Regional Innovation Strategy (RIS)" through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE) (2021RIS-001(1345341783)). This work was supported by a Korea Medical Device Development Fund (KMDF) grant received from the Korean government (MSIP) (No. KMDF_PR_20200901_0127-01).

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Correspondence to Dae Sung Yoon or Gyudo Lee.

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Cheong, D.Y., Lee, S.W., Park, I. et al. Bioinspired lotus fiber-based graphene electronic textile for gas sensing. Cellulose 29, 4071–4082 (2022). https://doi.org/10.1007/s10570-022-04541-6

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  • DOI: https://doi.org/10.1007/s10570-022-04541-6

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