Novel thin optical film sensors for the detection of carbon dioxide
Novel thin optical film sensors for the detection of carbon dioxide
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用于检测二氧化碳的新型薄膜光学传感器
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
H. McMurray
中科院分区：
文献类型：
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作者：
H. McMurray
描述了能够使用可见光间接光学感测二氧化碳的新材料。这些材料由增塑聚合物组成，其中溶解有酸碱指示染料的有机可溶性盐，可用作完全可逆和非消耗性传感器。它们可以以透明薄膜的形式生产，其吸光度受二氧化碳的强烈影响。这些薄膜完全不溶于水，不含挥发性成分;因此，它们在很宽的温度和相对湿度范围内发挥作用。描述了示例膜对二氧化碳的时间依赖性和时间无关性响应，并检查和讨论了影响传感器材料的响应时间和稳定性的因素。提出了一种机制来解释在一个基本上非水介质中的指示剂染料的二氧化碳的响应。可以制造将联合收割机亚秒响应时间与超过1年的储存寿命相结合的传感器。
New materials are described which enable the indirect optical sensing of carbon dioxide using visible light. These materials, consisting of plasticised polymers in which are dissolved organosoluble salts of acid–base indicator dyes, act as completely reversible and non-consumptive sensors. They may be produced in the form of thin, transparent films, the absorbance of which is strongly influenced by carbon dioxide. These films are completely insoluble in water and contain no volatile component; consequently, they function over a wide range of temperature and relative humidity. The time-dependent and time-independent responses to carbon dioxide of example films are described and factors which influence the response time and tability of the sensor materials are examined and discussed. A mechanism is proposed to explain the responsiveness to carbon dioxide of the indicator dyes in a substantially non-aqueous medium. Sensors may be fabricated which combine subsecond response times with storage lifetimes in excess of 1 year.