Title : Ultrafast, Highly Sensitive, Flexible Textile-Based Humidity Sensors Made of Nanocomposite Filaments

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Title of Paper:Ultrafast, Highly Sensitive, Flexible Textile-Based Humidity Sensors Made of Nanocomposite Filaments

Journal:Mater Today Nano

Key Words:SWCNT; PVA; Humidity Sensors; Textile Sensor; LiCl

Abstract:Wearable electronics are promising next-generation smart textiles for human-computer interaction, health monitoring, and other applications. However, integrating electronic functions into strong, highly deformable electronic textiles and maintaining their functionalities during wear is a great challenge. Herein, we report ultrafast, highly sensitive, textile-based humidity sensors made of single-walled carbon nanotube (SWNT)/polyvinyl alcohol (PVA)/lithium chloride (LiCl) nanocomposite filaments fabricated via a wet-spinning and a solvent exchange process. The SWNT/PVA/LiCl textile-based humidity sensors exhibited excellent stabilities during deformation and high sensitivities with 6-fold resistance variations over a wide range of relative humidity (RH) conditions. The ultrafast responses of the sensors were attributed to the quick deliquescence of LiCl during contact with water molecules and the simultaneous conductivity change caused by the generated ions. The as-prepared sensors responded well to human breathing and real-time humidity changing, which could distinguish different breaths and microclimate change. Such outstanding sensing performances of our textile-based sensors in combination with their mechanical flexibilities enable the facile integration of high-performance humidity sensors onto textile substrates for real-time microclimate monitoring.

All the Authors:Youngseok Oh,Byung-Mun Jung,Moon-Kwang Um,Sang-Kwan Lee,Tsu-Wei Chou

First Author:Zuoli He

Indexed by:Journal paper

Correspondence Author:Gengheng Zhou,JungIl Song,Joon-Hyung Byun

Discipline:Engineering

First-Level Discipline:Environmental Science and Engineering

Document Type:J

Volume:18

Page Number:100214

Number of Words:8000

Translation or Not:no

Date of Publication:2022-05-01

Included Journals:SCI