本文以聚苯乙烯磺酸钠为湿敏材料制备了高分子电阻型湿度传感器,研究了其在高温高湿环境下,施加交流电激励后的老化行为.考察了通电电压、通电时间等对传感器响应特性的影响,并对其老化机理进行了探讨.提出通电老化后,湿敏材料在不同湿度下的电阻变化决定于高温高湿环境造成的溶解效应和施加电压后引起的通道效应和离子破坏效应.研究表明,在较高湿度环境下(87～93%RH),施加800mv的电压可加速湿敏材料的老化过程,使湿度传感器响应信号较快达到稳定,从而有望改善湿度传感器的稳定性.
Resistive-type humidity sensors based on sodium polystyrenesulfonate were prepared,and the aging of the sensors were investigated by applying voltage on the sensors under high humidity and high temperature.The effects of the amplitude of the applied voltage.and duration of the aging on the humidity response of the sensors were examined,and the aging mechanism was explored.It is proposed that"dissolution effect","tunneling effect"and"ion-destroying effect"are the main factors affecting the variations in the resistance response of the sensors during aging process.Applying a voltage of 800 mV on the humidity sensors under high humidity(87～93%RH)accelerates the aging of the humidity sensitive material,and thus the resistance response to humidity of the sensors can be stabilized in a short time.In this sense,the electrical aging is expected to improve the long-term stability of polymer resistive-type humidity sensors.
参考文献
| [1] | Li Y;Yang MJ;She Y .Humidity sensitive properties of crosslinked and quaternized poly(4-vinylpyridine-co-butyl methacrylate)[J].Sensors and Actuators, B. Chemical,2005(1):252-257. |
| [2] | Su PG;Wang CP .Flexible humidity sensor based on TiO2 nanoparticles-polypyrrole-poly[3-(methacrylamino)propyl] trimethyl ammonium chloride composite materials[J].Sensors and Actuators, B. Chemical,2008(2):538-543. |
| [3] | 高分子电阻型湿敏元件的交流电激励老化的改性研究[J].传感技术学报,2000(01):56-60. |
| [4] | 刘崇进,贝承训,陈明光.高分子材料电阻型湿敏元件的光辐射预老化处理的实验与研究[J].合成材料老化与应用,1999(01):13. |
| [5] | Y. Li;M. J. Yang;Y. She .Humidity sensors using in situ synthesized sodium polystyrenesulfonate/ZnO nanocomposites[J].Talanta: The International Journal of Pure and Applied Analytical Chemistry,2004(4):707-712. |
| [6] | C.P.L. Rubinger;C.R. Martins;M.-A. De Paoli;R.M. Rubinger .Sulfonated polystyrene polymer humidity sensor: Synthesis and characterization[J].Sensors and Actuators, B. Chemical,2007(1):42-49. |
| [7] | Casalbore-Miceli G.;Camaioni N.;Mari CM.;Li Y.;Sun H.;Ling M.;Yang MJ. .Investigations on the ion transport mechanism in conducting polymer films[J].Solid state ionics,2000(3/4):311-321. |
| [8] | 刘景军,李效玉.高分子材料的环境行为与老化机理研究进展[J].高分子通报,2005(03):62-69. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%