偷看
乙二醇
材料科学
高分子化学
聚合物
PEG比率
共聚物
化学工程
化学
有机化学
复合材料
财务
工程类
经济
作者
Zhuang Zhuang,Yunfeng Li,Xifang Li,Chengji Zhao
出处
期刊:IEEE Sensors Journal
[Institute of Electrical and Electronics Engineers]
日期:2021-01-25
卷期号:21 (7): 8886-8895
被引量:17
标识
DOI:10.1109/jsen.2021.3054397
摘要
A novel humidity sensor based on polymer-salt complexes was developed in this research. Poly(ethylene glycol) (PEG) segmented poly(ether ether ketone) copolymers (PEEK-co-PEG) has been successfully synthesized via condensation polymerization and the structure of this copolymer was confirmed by 1 H NMR. Humidity sensors based on SPEEK/PEEK-co-PEG composites were prepared, and then humidity sensitive characteristics were systematically studied. Comparing with pure SPEEK, PEEK-co-PEG composites can significantly reduce the hysteresis effect of humidity sensors with the proportion of introduced PEG flexible segments increasing. Furthermore, different contents of LiCl were doped into polymer composites and their humidity sensing characteristics were also investigated. The humidity sensor based on SPEEK/PEEK-co-PEG/LiCl with [Li + ]:[O] ratio of 1:2 had excellent sensitivity, linearity, negligible hysteresis and quick response. Moreover, we proposed that the humidity sensing mechanism of sensors based on polymer-salt complexes is related to the combination of both directional motion of Li + on PEG backbone under low RH and ionization (SPEEK polyelectrolyte, Li + and Cl - ) under high RH. On the basis of these humidity sensing characteristics and mechanism, this work provides an approach to integrating polymeric and inorganic complexes as the promising materials for humidity sensors.
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