期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 242, 期 -, 页码 801-809出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.09.179
关键词
Sulfonated poly (ether ether ketone)s; Humidity sensor; Water sorption; Complex impedance
资金
- National Nature Science Foundation of China [21374034, 21474036]
Sulfonated poly (ether ether ketone)s (SPEEKs) with different values of sulfonation degree were successfully synthesized by a direct aromatic nucleophilic substitution polymerization of sulfonated monomers. By the direct-synthesis method, the number of sulfonic acid groups can be precisely controlled. They were then fabricated by spin coating on a ceramic substrate to be used as a novel polymeric humidity sensor. The morphology of the ionic polymers especially the microstructure of ionic clusters, water sorption and the complex impedance spectra of the sensors were investigated to explain the humidity sensing characteristics and the sensing mechanism under different relative humidity. In addition, SPEEK-6 polymer with sulfonation degree (D-s = 1.18) was chosen as the optimal humidity sensing materials, which possessed high sensitivity and satisfactory linearity ranging from 11% RH to 97% RH. Furthermore, it exhibited a small hysteresis (less than 3% RH) during the sorption processes, an acceptable response/recovery time (100 s response and 105 s of recovery time) and an excellent repeatability. These results indicated SPEEKs could be promising for applications in humidity sensor. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据