A highly sensitive humidity sensor based on a nanofibrous membrane coated quartz crystal microbalance
A highly sensitive humidity sensor based on a nanofibrous membrane coated quartz crystal microbalance
复制标题
基于纳米纤维膜涂层石英晶体微天平的高灵敏度湿度传感器
DOI：
10.1088/0957-4484/21/5/055502
复制
发表时间：
2010-02-05
期刊：
影响因子：
3.5
通讯作者：
Pan, Fukui
中科院分区：
文献类型：
--
作者：
Wang, Xianfeng;Ding, Bin;Pan, Fukui
采用静电纺丝技术在石英晶体微天平上制备了纳米纤维膜湿敏传感器。传感实验结果表明，在室温下，传感器的响应随相对湿度（RH）从6%增加到95%，增加了两个数量级以上，具有较高的灵敏度;在20%~ 95% RH范围内，Log（Δf）呈良好的线性关系。在95%RH条件下，纤维复合膜的灵敏度比相应的平膜高2倍。与纤维状PAA/PVA膜相比，PAA纳米纤维膜由于PAA含量高、纤维间形成的微气泡具有较大的比表面积，因而具有显著的湿敏性。此外，所得传感器表现出良好的可逆行为和良好的长期稳定性。
A novel humidity sensor was fabricated by electrospinning deposition of nanofibrous polyelectrolyte membranes as sensitive coatings on a quartz crystal microbalance (QCM). The results of sensing experiments indicated that the response of the sensors increased by more than two orders of magnitude with increasing relative humidity (RH) from 6 to 95% at room temperature, exhibiting high sensitivity, and that, in the range of 20–95% RH, the Log(Δf) showed good linearity. The sensitivity of fibrous composite polyacrylic acid (PAA)/poly(vinyl alcohol) (PVA) membranes was two times higher than that of the corresponding flat films at 95% RH. Compared with fibrous PAA/PVA membranes, the nanofibrous PAA membranes exhibited remarkably enhanced humidity sensitivity due to their high PAA content and large specific surface area caused by the formation of ultrathin nanowebs among electrospun fibers. Additionally, the resultant sensors exhibited a good reversible behavior and good long term stability.