Sensitive and flexible humidity sensor based on sodium hyaluronate/MWCNTs composite film

被引：0
作者：
Chengcheng Cai
Weiqiang Zhao
Jing Yang
Lei Zhang
机构：
[1] Tianjin University,Department of Biochemical Engineering, School of Chemical Engineering and Technology, Frontier Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering (Ministry of Education), Collaborative Innovation Center of
[2] Tianjin University,Frontier Technology Research Institute
来源：
Cellulose | 2021年 / 28卷
关键词：
Humidity sensor; Sodium hyaluronate; Multi-walled carbon nanotubes; Ultrafast response; Breath monitoring;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A sensitive humidity responsive sensor based on sodium hyaluronate (SH)/multi-walled carbon nanotubes (MWCNTs) composite film is reported. The sensor is fabricated on a flexible interdigital electrode of a polyethylene terephthalate substrate by a drop coating method. The humidity sensing properties, including repeatability, hysteresis, stability, response-recovery characteristics are investigated, and the film containing 50 wt% MWCNTs exhibits the best performance. Compared with most previous work, this resultant sensor presents a broader detection range for relative humidity (11–98% RH) and faster response/recovery performance (0.32 s/0.27 s). Moreover, the sensor possesses excellent stability after the humidity changes repeatedly, long-term operation, temperature changes and cyclic mechanical bending. The outstanding performance is probably attributable to the synergistic effect of SH and MWCNTs. This sensor developed in this work possesses the potential to be applied in breath monitoring, respiration pattern identification, and touchiness switch by sensing skin sweat evaporation in a non-contact way.
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收藏
页码：6361 / 6371
页数：10
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