聚吡咯
材料科学
制作
湿度
电阻式触摸屏
相对湿度
复合数
导电聚合物
聚合
聚合物
光电子学
化学工程
复合材料
聚苯胺
电极
旋涂
电导率
导电体
化学
电气工程
病理
物理化学
工程类
物理
替代医学
热力学
医学
作者
Mushahid Hussain,Saqib Hasnain,Nadir Zaman Khan,Shehar Bano,Fazeelat Zuhra,Muhammad Ali,Munawar M. Khan,Naseem Abbas,Ahsan Ali
出处
期刊:Polymers
[MDPI AG]
日期:2021-09-07
卷期号:13 (18): 3019-3019
被引量:5
标识
DOI:10.3390/polym13183019
摘要
In this research article, an organic polymer based polypyrrole (Ppy) composite material has been synthesized and analyzed for the design and fabrication purposes of a fast-responsive, highly sensitive, and an economical resistive-type novel humidity detection sensor. This humidity sensor most suitably serves the purpose for industrial humidity (i.e., values ranging from low to high) detection applications. First, a polypyrrole composite material (a mixture of polypyrrole, polypyrrole-NiO, polypyrrole-CeO2, and polypyrrole-Nb2O5) has been synthesized by chemical oxidative polymerization method, and then is treated at various temperatures, i.e., 100, 150 and 200 °C, respectively. After this treatment, the synthesized samples were then characterized by using FTIR, SEM, and DTA/TGA techniques for analyzing humidity sensing properties. The polypyrrole samples with the best morphological structure and properties were then incorporated on interdigitated electrodes. For the fabrication purposes of this thin film structure, at first a few drops of polyvinyl alcohol (PVA) were placed over interdigitated electrodes (IDE) and then the synthesized polypyrrole composite was uniformly deposited in the form of a thin film over it. The plots show that this is a good resistive-type humidity detection device for the relative humidity range of 30% to 90%. The response and recovery times of this newly fabricated humidity sensor were reported to be the same as 128 s at room temperature. Additionally, the stability and the repeatability response behavior of this Ppy sensor were verified up to five cycles of multiple repetitions. This presents an excellent stability and repeatability performance of the sensor. Furthermore, the capacitances versus humidity response and recovery properties of the designed sensor were studied too. This illustrates an excellent capacitive verses humidity response and shows a linear and an active behavior. Lastly, the experimental result proves that polypyrrole composite thin film shows a reasonable best performance up to a temperature of 100 °C.
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