Scalable Fabrication of Highly Flexible Porous Polymer-Based Capacitive Humidity Sensor Using Convergence Fiber Drawing
Scalable Fabrication of Highly Flexible Porous Polymer-Based Capacitive Humidity Sensor Using Convergence Fiber Drawing
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DOI：
10.3390/polym11121985
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发表时间：
2019-12
期刊：
影响因子：
5
通讯作者：
M. Tousi;Yujing Zhang;Shaowei Wan;Li Yu;Chong Hou;Ning Yan;Y. Fink;Anbo Wang;X. Jia
中科院分区：
文献类型：
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作者：
M. Tousi;Yujing Zhang;Shaowei Wan;Li Yu;Chong Hou;Ning Yan;Y. Fink;Anbo Wang;X. Jia
在本研究中，我们使用一种可伸缩的会聚光纤拉伸方法制作了一种高度柔性的基于光纤的电容式湿度传感器。该传感器的传感层由多孔聚醚酰亚胺(PEI)制成，其孔洞是在光纤拉伸过程中原位产生的，而其电极是由铜线制成的。孔隙率导致在低相对湿度(RH)水平(这里是70%)开始的毛细凝结，导致传感器在RH水平(从70%到80%)时的响应显著增加。该湿度传感器在70%-80%RH范围内的灵敏度为0.39 pF/%RH，在70%RH下的最大滞后为9.08%RH，温度依赖性小，48h内具有良好的稳定性。这项工作展示了第一个利用会聚光纤拉伸制作的光纤湿度传感器。
In this study, we fabricated a highly flexible fiber-based capacitive humidity sensor using a scalable convergence fiber drawing approach. The sensor’s sensing layer is made of porous polyetherimide (PEI) with its porosity produced in situ during fiber drawing, whereas its electrodes are made of copper wires. The porosity induces capillary condensation starting at a low relative humidity (RH) level (here, 70%), resulting in a significant increase in the response of the sensor at RH levels ranging from 70% to 80%. The proposed humidity sensor shows a good sensitivity of 0.39 pF/% RH in the range of 70%–80% RH, a maximum hysteresis of 9.08% RH at 70% RH, a small temperature dependence, and a good stability over a 48 h period. This work demonstrates the first fiber-based humidity sensor fabricated using convergence fiber drawing.