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首页> 外文期刊>IEEE sensors journal >Biopolymer-Polyaniline Composite for a Wide Range Ammonia Gas Sensor
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Biopolymer-Polyaniline Composite for a Wide Range Ammonia Gas Sensor

机译：用于大范围氨气传感器的生物聚合物-聚苯胺复合材料

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摘要

This paper reports the wide range ammonia sensing behavior of biopolymer polyaniline composite. The agarose–guar gum-polyaniline (A–G-PANI) composite films were prepared by the synthesis of polyaniline in the biopolymeric matrix. The polyaniline biocomposite exhibits an interpenetrated network structure as confirmed by field emission scanning electron microscopy. The synthesized polyaniline biopolymer composite shows an excellent ammonia sensing behavior over a wide range of 10–90 000 ppm (9%). The sensor shows high performance in terms of sensitivity factor ( ranging from 1.07 to 34.95 in the entire concentration range. The response time and recovery time of the sensor varies from 2 to 5 min and 5 to 25 min, respectively, with respect to the increase in the concentration of gas. The sensor shows selective response against HS, ethanol, methanol, and acetone. The enhanced performance of the sensor is attributed to the presence of large number of sites provided by the interpenetrated network structure of polyaniline biocomposite. The electrical circuit model for A–G-PANI is constructed using the electrical impedance spectroscopy, and a probable mechanism is proposed for detection over a wide range.
机译：本文报道了生物聚合物聚苯胺复合材料的宽范围氨感测行为。琼脂糖-瓜尔胶-聚苯胺（AG-PANI）复合膜是通过在生物聚合物基质中合成聚苯胺制备的。聚苯胺生物复合材料表现出互穿的网络结构，这通过场发射扫描电子显微镜得到了证实。合成的聚苯胺生物聚合物复合材料在10–90 000 ppm（9％）的宽范围内显示出出色的氨感测性能。传感器在灵敏度因子方面表现出很高的性能（在整个浓度范围内，范围从1.07至34.95。传感器的响应时间和恢复时间分别随增加的2至5分钟和5至25分钟而变化。传感器显示出对HS，乙醇，甲醇和丙酮的选择性响应；传感器性能的提高归因于聚苯胺生物复合材料互穿网络结构提供的大量位点。利用电阻抗光谱技术建立了A-G-PANI模型，并提出了可能的大范围检测机制。

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