Humidity sensors based on Li-loaded nanoporous polymers
Humidity sensors based on Li-loaded nanoporous polymers
复制标题
基于载锂纳米多孔聚合物的湿度传感器
DOI：
10.1016/j.snb.2013.09.013
复制
发表时间：
2014-01-01
影响因子：
8.4
通讯作者：
Zhang, Tong
中科院分区：
文献类型：
--
作者：
Fei, Teng;Jiang, Kai;Zhang, Tong
采用溶剂热自由基聚合法合成了基于二乙烯基苯的纳米多孔聚合物。通过一系列表征确定了所得聚合物聚二乙烯基苯（PDVB）的纳米孔特性。以疏水性多孔聚合物为主体，制备了复合湿敏材料。将不同含量的LiCl负载到纳米多孔聚合物中，研究了其湿敏特性。与纯PDVB相比，LiCl负载大大提高了复合材料的湿敏性。基于5wt%LiCl/PDVB的传感器表现出最好的相对湿度（RH）的传感性能。优化后的传感器阻抗在整个湿度范围内变化三个数量级，具有良好的线性和快速响应。复阻抗谱表明，在低湿度范围内，质子是主要的载流子，而在高湿度范围内，离子（Li+和Cl-）是主要的载流子。结果表明，纳米多孔聚合物是一种很有前途的新型湿敏材料。(C)2013爱思唯尔有限公司版权所有。
Nanoporous polymer based on divinylbenzene was synthesized by radical polymerization with a solvothermal route. The nanoporous characteristic of the resultant polymer poly(divinylbenzene) (PDVB) was determined by a series of characterizations. The hydrophobic porous polymer was used as the host to prepare composited humidity sensitive materials. Different levels of LiCl were loaded into the nanoporous polymer and their humidity sensing properties were researched. Humidity sensitivities of the composites were greatly improved by LiCl loading compared with pure PDVB. The sensor based on 5 wt% LiCl/PDVB showed the best sensing properties to relative humidity (RH). The impedance of the optimum sensor changed three orders of magnitude over the whole humidity range, with a good linearity and rapid response. The mechanism by the complex impedance plots suggests the protons are the domination carrier in low humidities and ions (Li+ and Cl-) in a high humidity range. The results demonstrate nanoporous polymers are a new kind of promising materials for humidity sensors. (C) 2013 Elsevier B.V. All rights reserved.