PEG/Li^+聚合物电解质薄膜气敏性能研究

Study on the Gas Sensing Properties of PEG/Li^+Thin Films

采用不同摩尔质量的聚乙二醇(PEG)与高氯酸锂盐混合制备电解质薄膜,将这种材料应用于气敏传感器领域作为一种新颖的气敏传感材料,研究了薄膜样品对于各种有机溶剂蒸气的电阻响应行为。结果表明,PEG/Li+电解质薄膜对非极性溶剂基本不响应,对极性溶剂具有明显的气敏响应行为,其中对于蒸气乙酸具有明显的响应选择性、快速的气敏响应行为和高的灵敏度,这主要归功于锂离子与聚乙二醇中的醚氧原子产生强烈的配位络合作用,从而使得溶剂分子与电解质薄膜相互作用产生不同的电阻气敏响应行为。

A novel gas sensor was fabricated by mixing the different molecular weight of polyethylene glycol （PEG） and lithium into electrolyte thin films in this experiment, and the resistance responsiveness of the film samples against various organic vapors was investigated. The results show that obvious responsivities to polar solvent vapors were observed, the film did not respond basically against nonpolar solvent vapors, and the electrolyte thin films displayed visiblely chemical selectivity, fast ponse and good sensitivity to acetic acid vapor, which is attributed to the coordination interaction between the ether oxygen atoms of PEG and lithium that is utilized to illuminate the different resistance responsiveness induced by solvent vapor molecules interacting with the electrolyte thin films.