Cited by 264Advanced Sensor and Energy Harvesting MaterialsGas Sensing Nanomaterials and SensorsCarbon Nanotubes in Composites

Highly Sensitive Wearable Textile-Based Humidity Sensor Made of High-Strength, Single-Walled Carbon Nanotube/Poly(vinyl alcohol) Filaments

Zhou, Gengheng, Byun, Joon-Hyung, Oh, Youngseok, Jung, Byung-Mun, Cha, Hwa-Jin, Seong, Dong-Gi, Um, Moon-Kwang, Hyun, Sangil +1 more·2017·ACS Applied Materials & Interfaces

Abstract

Textile-based humidity sensors can be an important component of smart wearable electronic-textiles and have potential applications in the management of wounds, bed-wetting, and skin pathologies or for microclimate control in clothing. Here, we report a wearable textile-based humidity sensor for the first time using high strength (∼750 MPa) and ultratough (energy-to-break, 4300 J g –1 ) SWCNT/PVA filaments via a wet-spinning process. The conductive SWCNT networks in the filaments can be modulated by adjusting the intertube distance by swelling the PVA molecular chains via the absorption of water molecules. The diameter of a SWCNT/PVA filament under wet conditions can be as much as 2 times that under dry conditions. The electrical resistance of a fiber sensor stitched onto a hydrophobic textile increases significantly (by more than 220 times) after water sprayed. Textile-based humidity sensors using a 1:5 weight ratio of SWCNT/PVA filaments showed high sensitivity in high relative humidity. The electrical resistance increases by more than 24 times in a short response time of 40 s. We also demonstrated that our sensor can be used to monitor water leakage on a high hydrophobic textile (contact angle of 115.5°). These smart textiles will pave a new way for the design of novel wearable sensors for monitoring blood leakage, sweat, and underwear wetting.

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Crossref · 10.1021/acsami.6b12448

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64 of 64 references verified0 citation errors · 0 not checkable

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  • In a CNT/poly(vinyl alcohol) (PVA) fiber based resistive sensor, high humidity level can swell the filament, decrease the intertube distance of CNTs and thus decrease the resistance of the CNT/PVA fibers.

    “In a CNT/poly(vinyl alcohol) (PVA) fiber based resistive sensors, high humidity level can swell the filament, decrease the intertube distance of CNTs and thus decrease the resistance of the CNT/PVA fibers.[55]”

    From Nanomaterial-Enabled Wearable Sensors for Healthcare (2018) · cites this paper as [55]

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Authors
Zhou, G., Byun, J.-H., Oh, Y., Jung, B.-M., Cha, H.-J., Seong, D.-G., Um, M.-K., Hyun, S., & Chou, T.-W.
Affiliations
  • Korea Institute of Materials Science (KR)
  • Korea Institute of Ceramic Engineering and Technology (KR)
  • University of Delaware (US)
Corresponding author
  • Zhou, Gengheng
  • Byun, Joon-Hyung
  • Oh, Youngseok
Venue
ACS Applied Materials & Interfaces
Published
2017-01-30
Volume
9
Issue
5
Pages
4788-4797
ISSN
  • 1944-8244 (ISSN-L)
  • 1944-8252
OpenAlex
W2575987011
Cited by
264
References
64
Citations by year
2026: 14 · 2025: 20 · 2024: 26 · 2023: 28 · 2022: 43 · 2021: 40 · 2020: 35 · 2019: 32 · 2018: 18 · 2017: 8
FWCI
11.47
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Applied Materials & Interfaces (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Korea Institute of Materials Science
  • National Research Foundation of Korea (NRF-2007-00017, NRF-2015R1C1A02037139)
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Gas Sensing Nanomaterials and Sensors
  • Physical Sciences › Materials Science › Materials Chemistry › Carbon Nanotubes in Composites
Keywords
wearable sensors, single-walled carbon nanotubes, polyvinyl alcohol, wet spinning, resistance change, water absorption, smart textiles, hydrophobic textiles, high-strength fibers

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