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COMPOSITE MEMBRANE FOR GAS SENSOR, GAS SENSOR, AND METHOD FOR MANUFACTURING COMPOSITE MEMBRANE FOR GAS SENSOR
COMPOSITE MEMBRANE FOR GAS SENSOR, GAS SENSOR, AND METHOD FOR MANUFACTURING COMPOSITE MEMBRANE FOR GAS SENSOR
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机译:用于气体传感器的复合膜,气体传感器以及制造用于气体传感器的复合膜的方法
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摘要
PROBLEM TO BE SOLVED: To measure the concentration of carbon dioxide continuously accurately in the vicinity of room temperature. ;SOLUTION: A composite membrane for a gas sensor includes a conductive polymer 1 such as base-type polyaniline(PAn) and an insulating polymer 2 such as polyvinylalcohol(PVA) as material. Base-type PAn is obtained by subjecting a powder of polyanthranilic acid(PANA) to heat treatment at a predetermined temperature for a predetermined time. The base-type PAn is dissolved in dimethyl sulfoxide(DMSO) and then mixed with a PVA/DMSO solution to create a composite solution. Then the composite solution is cast into a micro platinum comb electrode formed on a glass substrate, and a solvent is removed by vacuum drying to obtain a gas sensor. In this gas sensor, HCO3 is created by the reaction between CO2 gas and water held by PVA, and the created HCO3 is captured in the base-type PAn as a dopant to change the electric conductivity of a composite membrane.;COPYRIGHT: (C)2000,JPO
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