Abstract
Human-made natural-fiber-based filaments are attractive for natural fiber-reinforced polymer (NFRP) composites. However, the composites' moisture distribution is critical, and humidity monitoring in the NFRP composites is essential to secure stability and keep their life span. In this research, high strength and humidity sensing filament was developed by blending cellulose nanofiber (CNF) and graphene oxide (GO), wet-spinning, coagulating, and drying, which can overcome the heterogeneous mechanical properties between embedded-type humidity sensors and NFRP composites. The stabilized synthesis process of the CNF-GO hybrid filament demonstrated the maximum Young's modulus of 23.9 GPa and the maximum tensile strength of 439.4 MPa. Furthermore, the achieved properties were successfully transferred to a continuous fabrication process with an additional stretching process. Furthermore, its humidity sensing behavior is shown by resistivity changes in various temperature and humidity levels. Therefore, this hybrid filament has excellent potential for in-situ humidity monitoring by embedding in smart wearable devices, natural fiber-reinforced polymer composites, and environmental sensing devices.
Highlights
Graphene oxide hybrid filament made by continuous processing and its humidity monitoring Hyun Chan Kim, Pooja S
Identical peaks of cellulose nanofiber (CNF) and CNGO hybrids filament denote the absence of any noticeable chemical interactions between CNF and graphene oxide (GO) when mixing[24,25,26]
The Fourier transform infrared (FTIR) analysis identified the presence of the hydrogen bond between CNF and GO
Summary
Graphene oxide hybrid filament made by continuous processing and its humidity monitoring Hyun Chan Kim, Pooja S. The composites’ moisture distribution is critical, and humidity monitoring in the NFRP composites is essential to secure stability and keep their life span. High strength and humidity sensing filament was developed by blending cellulose nanofiber (CNF) and graphene oxide (GO), wet-spinning, coagulating, and drying, which can overcome the heterogeneous mechanical properties between embedded-type humidity sensors and NFRP composites. Its humidity sensing behavior is shown by resistivity changes in various temperature and humidity levels This hybrid filament has excellent potential for in-situ humidity monitoring by embedding in smart wearable devices, natural fiber-reinforced polymer composites, and environmental sensing devices. A cellulose nanofiber (CNF)-based filament exhibited its Young’s modulus of 37 GPa and tensile strength of 540 MPa6–8 They show outstanding mechanical properties, the filament is sensitive to moisture due to the CNF’s hydrophilicity. It provides convenient access to fabricate nanocomposites with other
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