基于穴番-A敏感膜的新型声表面波瓦斯传感器-《郑州大学学报(工学版)》

文章信息/Info

作者:: 王文¹; 胡浩亮¹; 何世堂¹; 潘勇²; 张彩红³; 1.中国科学院声学研究所,北京,100190;2.防化研究院国民核生化灾害防护国家重点实验室,北京,102205;3.山西大学化学化工学院,山西太原,030006

Author(s):: Wang Wen1; Hu Haoliang1; He Shitang1; Pan Yong2; Zhang Caihong3; 1. Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190; 2. State Key Laboratory of National Nuclear, Biological and Chemical Disaster Protection, Institute of Chemical Defense, Beijing, 102205; 3. College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, Shanxi, 030006

Keywords:: urface acoustic wave; methane gas sensor; cryptophane-A; resonator-oscillators

摘要:: 针对现有瓦斯检测与报警技术难以实现瓦斯气体现场检测与报警的现状，利用笼形超分子材料穴番-A在常温下对甲烷分子包封特性，研制了一种以穴番-A作为敏感膜材料的声表面波瓦斯传感器.传感器由具有高频率稳定度的300 MHz双通道差分式谐振器型振荡器以及涂覆于传感通道器件表面的穴番-A敏感膜构成.通过两步合成法制备的穴番-A以点涂法镀膜于传感器件表面.试验结果显示，所研制的新型声表面波瓦斯传感器表现出快速响应(<10 s)、高灵敏度(184 Hz/%)、较低检测下限(理论可达0.05%)以及宽动态范围内(0~5%)良好的线性特性等特点，在煤矿井下瓦斯监测与报警中极具应用潜力.

Abstract:: In view of the current situation that the traditional methane sensor technology is difficult to imple-ment the field detection and monitor on methane gas, a novel room-temperature SAW methane gas sensor coa-ted with cryptophane-A sensing interface is proposed by utilizing the supermolecular compound cryptophane-A’ s specific clathration to methane molecules. The sensor was composed of differential resonator-oscillators with excellent frequency stability, a supra-molecular CrypA coated along the acoustic propagation path, and a frequency acquisition module. The supramolecular CrypA was synthesized from vanillyl alcohol using a three-step method and deposited onto the surface of the sensing resonators via dropping method. Fast response and excellent repeatability were observed in gas sensing experiment, and the estimated detection limit and meas-ured sensitivity in gas dynamic range of 0 . 2% ~5% was evaluated as ~0 . 05 % and ~184 Hz/%, respec-tively. The measured results indicated the SAW sensor was promising for under-mine methane gas detection and monitor.