Humidity sensing properties of LiCl-loaded porous polymers with good stability and rapid response and recovery

Humidity sensing properties of LiCl-loaded porous polymers with good stability and rapid response and recovery
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负载LiCl的多孔聚合物的湿度传感性能具有良好的稳定性和快速的响应和恢复能力

DOI:
10.1016/j.snb.2014.03.047
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发表时间:
2014-08
期刊:
Sensors and Actuators B: Chemical
影响因子:
--
通讯作者:
Zhang, Tong
Zhang, Tong
中科院分区:
其他
文献类型:
--
作者:
Jiang, Kai;Fei, Teng;Zhang, Tong

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采用Friedel-Crafts烷基化聚合法制备了一种新型多孔聚合物,并通过傅里叶红外光谱(FTIR)、n2吸附/解吸分析、扫描电镜(SEM)和透射电镜(TEM)对聚合物的结构和特性进行了表征。将所得聚合物通过负载LiCl制备湿敏复合材料。与纯聚合物相比,负载LiCl的复合材料具有更好的湿度传感性能,其中4 wt%的LiCl/聚合物传感器具有最好的传感性能。最优传感器的阻抗在整个湿度范围内变化近4个数量级,线性好,滞后小,稳定性好,响应和恢复时间短(分别为2 s和7 s)。采用复阻抗图研究导电机理。
A novel porous polymer was synthesized by Friedel-Crafts alkylation polymerization, and the structure and characteristic of the polymer was determined by Fourier transform infrared spectroscopy (FTIR), N2adsorption/desorption analysis, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The obtained polymer was used to prepare humidity sensitive composites by loading LiCl. Compared with the pure polymer, LiCl-loaded composites showed improved humidity sensing properties and the 4 wt% LiCl/polymer sensor showed the best sensing properties. The impedance of the optimum sensor changed near four orders of magnitude over the whole humidity range, with a good linearity, little hysteresis, good stability and short response and recovery times (2 and 7 s, respectively). The complex impedance plots were used to research conductive mechanism.
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