文化大學機構典藏 CCUR:Item 987654321/2743
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    题名: Humidity sensing and electrical properties of hybrid films prepared from [3-(methacrylamino)propyl] trimethyl ammonium chloride, aqueous monodispersed colloidal silica and methyl methacrylate
    作者: Su, Pi-Guey
    Sun, Yi-Lu
    Wang, Chao-Shen
    Lin, Chu-Chieh
    贡献者: 化學系
    关键词: humidity sensor
    hybrid film
    poly-MAPTAC
    MSMA-SiO2
    MMA
    complex impedance spectra
    日期: 2006
    上传时间: 2009-11-20 11:02:24 (UTC+8)
    摘要: Humidity-sensitive hybrid films were synthesized from [3-(methacrylamino)propyl] trimethyl ammonium chloride (MAPTAC), aqueous monodispersed colloidal silica with a coupling agent of 3-(trimethoxysilyl)propyl methacrylate (MSMA), and methyl methacrylate (MMA). The thin film material was subjected to infrared analysis. Subsequently, its humidity sensing characteristics and the sensing mechanism were investigated by measuring the complex impedance spectra of the sensor at different humidity levels. The capacity tolerance to high humidity atmosphere, sensitivity and linearity of pure poly-MAPTAC film was increased by addition of MSMA-SiO2 and MMA. The complex impedance spectra and composition were used to explain the increase in sensitivity and linearity of the poly-MAPTAC added with MSMA-SiO2 and MMA. The characteristics of the humidity sensor, such as tolerance to high humidity atmosphere (97% RH) and chemical environment (20% C2H5OH vapor), sensitivity, linearity, hysteresis, response time, temperature dependency, frequency dependency and long-term stability, were further studied. The activation energy for conduction reduced with water adsorption. (c) 2006 Elsevier B.V. All rights reserved.
    關聯: SENSORS AND ACTUATORS B-CHEMICAL Volume: 119 Issue: 2 Pages: 483-489
    显示于类别:[化學系所] 期刊論文

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