Journal
LANGMUIR
Volume 35, Issue 14, Pages 4834-4842Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.8b04259
Keywords
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Funding
- 2018 Spring's Innovation Fund for Excellent PhD Theses at South China University of Technology
- State Key Laboratory of Pulp and Paper Engineering at South China University of Technology [2017ZD01]
- National Program on Key Basic Research Project of China [2010CB732206]
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Flexible and highly sensitive humidity sensors are crucial for humidity detection. In this study, a flexible cellulose nanofiber/carbon nanotube (NFC/CNT) humidity sensor with high sensitivity performance was developed via fast vacuum filtration. CNTs were well dispersed in water by using 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized NFC as a dispersant. More importantly, NFC also acted as a humidity sensitive material, achieving superior performance of NFC/CNT humidity sensors. The obtained NFC/CNT humidity sensor with 5 wt % CNT loading exhibits outstanding sensitive performance, and its response value reaches a maximum of 69.9% (Delta I/I-0) at 95% relative humidity (RH). It also displays good bending resistance and long-term stability. In addition, the NFC/CNT humidity sensor was employed to monitor human breath. Therefore, we believe that the flexible, highly sensitive, and simply designed NFC/CNT humidity sensor is a promising candidate for various applications in the field of humidity measurement.
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