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研究论文

全氟磺酸锂电导率式湿度传感器

  • 徐洪峰 ,
  • 刘晶 ,
  • 万莉
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  • 大连铁道学院环境科学与工程系,大连铁道学院环境科学与工程系,大连铁道学院环境科学与工程系 辽宁大连,116028 ,辽宁大连,116028 ,辽宁大连,116028

收稿日期: 2003-05-28

  修回日期: 2003-05-28

  网络出版日期: 2003-05-28

Perfluorinated Sulfonic Acid Lithium Conductivity Humidity Sensor

  • XU Hong_feng ,
  • LIU Jing ,
  • WAN Li
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  • (Dalian Railway Institute,Dalian 116028,China)

Received date: 2003-05-28

  Revised date: 2003-05-28

  Online published: 2003-05-28

摘要

以碳纸为电极,Nafion溶液再铸薄膜为感湿材料,并用氯化锂将膜转换成Li+型,制备了固体聚合物电解质湿度传感器.测定了不同相对湿度下,传感器的电导率响应与相对湿度之间关系.结果表明:在相对湿度为10%~97%范围内,传感器的电导率响应对数与相对湿度之间成良好的线性关系,线性度为0.997;传感器响应的时间为40s左右;于200h内稳定性和重复性良好.

本文引用格式

徐洪峰 , 刘晶 , 万莉 . 全氟磺酸锂电导率式湿度传感器[J]. 电化学, 2003 , 9(2) : 217 -221 . DOI: 10.61558/2993-074X.1508

Abstract

Treat carbon paper with 3% PTFE solution and dried in 340 ℃ for 40 minutes to enhance its intension, and level off the surface of the carbon paper with a mixture of XC_72 carbon black and PTFE solution. With those treated carbon paper as electrodes,recast Nafion thin film from 5% Nafion solution as humidity sensitive material, a solid polymer electrolyte humidity sensor was prepared on a thin PET film.Take the relative humidity data from several saturated salt solutions, the relationship between conductivity response and relative humidity was studied at different relative humidies.The results showed: when the polymer electrolyte was H+ type,the linear response of range was about 40%~97% relative humidity, and exchanging the H+ of the Nafion into Li+, a linear response range was from 10% to 97% relative humidity, the humidity sensor has good stability and reversibility in 200 hours,its response time is less than 40 seconds and its conductivity response is less affected by temperatures.

参考文献

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