4.7 Article

Bioinspired lotus fiber-based graphene electronic textile for gas sensing

期刊

CELLULOSE
卷 29, 期 7, 页码 4071-4082

出版社

SPRINGER
DOI: 10.1007/s10570-022-04541-6

关键词

Lotus fiber; Cellulose fiber; Graphene; Wearable device; Electronic textile; Nitrogen dioxide

资金

  1. National Research Foundation of Korea (NRF) - Korean Government (MSIP) [NRF-2022R1A2C4001990, NRF-2021R1A4A1028969, NRF-2020R1A2C2102262, NRF-2019R1A2B5B01070617, NRF-2020R1A6A3A01096477]
  2. Korea University
  3. BK21 FOUR (Fostering Outstanding Universities for Research)
  4. National Research Foundation of Korea (NRF) - Ministry of Education (MOE) [2021RIS-001(1345341783)]
  5. Korea Medical Device Development Fund (KMDF) grant from Korean government (MSIP) [KMDF_PR_20200901_0127-01]
  6. National Research Foundation of Korea [KMDF_PR_20200901_0127-01] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

向作者/读者索取更多资源

In this study, researchers successfully fabricated reduced graphene oxide-coated lotus fiber (RGOLF), which demonstrated high electrical conductivity and remarkable sensing performance for hazardous gases. The RGOLF also exhibited good mechanical flexibility and elasticity, making it a promising candidate for gas sensing applications in environmental air.
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 (similar to 3 g/L) and fiber diameter (similar to 300 mu m), the higher the electrical conductivity of the RGOLF was measured. The RGOLF exhibited a higher electrical conductivity (4.63 +/- 0.22 mu S) and a remarkable sensing performance for hazardous NO2 gas molecules within a short exposure time (similar to 3 min), including a low detection limit (similar to 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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