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題 名 | Methanol Sensors Based on Conductive Polymer Composites from Polypyrrole and Poly (Ethylene Oxide)--Sensing Properties(Ⅰ)=聚咇咯與聚環氧乙烯複合材料之甲醇感測器--感測性質(1) |
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作 者 | 林智汶; 楊振毅; 黃炳照; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 30:6 1999.11[民88.11] |
頁 次 | 頁449-456 |
分類號 | 461.63 |
關鍵詞 | 聚咇咯; 聚環氧乙烯; 複合材料; 甲醇感測器; PPy; PEO; Cas sensor; Methanol; Sensitivity; |
語 文 | 英文(English) |
中文摘要 | 本研究首先以電化學法製備聚咇咯與聚環氧乙烯複合薄膜,並探討其對甲醇感測 能力,包括感度、應答及回復等特性等。此複合材料感測器對甲醇氣體之感測具再現性,結 果發現在 0.2C 至 0.8C 之間,其對甲醇之感測能力與電聚合電量有關,在較低聚合電量, 可得較好之感測效果,當甲醇濃度低於 27mg/l, 以 0.2C 製備之 PPy-PEO 感測器, 可得 3.228 Ω / mgl �笐薑妊怢庢P度。甲醇濃度愈高,應答及回復速變慢。 PEO 含量響感度之 次序為 7.0mg/l>0mg/l (純 PPy)>2.5 mg/l. PEO 能增加此感測器在大氣中之穩定性。 |
英文摘要 | Polypyrrole-poly(ethylene oxide)(PPy-PEO) composite films were prepared electrochemically. Their methanol-sensing abilities including sensitivity, response and recovery actions were investigated. The composite sensors had consistent producibilities as they were exposed to the methanol-nitrogen cycles. It was found that the methanol-sensing abilities were dependent upon the electropolymerization charge, ranging from 0.2 coulombs (C) to 0.8C, and were better as the polymerization charge was decreased. A best sensitivity of 3.228 Ω /mgl �笐� was obtained by a PPy-PEO sensor, polymerized at 0.2C, in an methanol concentration, lower than 27 mg/l. However, higher methanol concentrations resulted in slower action in both response and recovery. The effect of PEO loading on the sensitivity of the sensor exhibited an order of 7.0 mg/ml >Omg/ml (pure PPy)>2.5 mg/ml. The incorporation of PEO improved the stability of the sensor marterial in the atmosphere environment. |
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