Humidity sensitive poly(2,5-dimethoxyaniline)/WOb>3b> composites

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• 作者：Dewyani Patil ; You-Kyong Seo ; Young Kyu Hwang ; Jong-San Chang ; Pradip Patil
• 关键词：Conducting polymers ; Poly(2 ; 5-dimethoxyaniline) ; Poly(2 ; 5-dimethoxyaniline)/WOb>3b> composites ; Humidity sensor
• 刊名：Sensors and Actuators B ; Chemical
• 出版年：2008
• 期刊代码：161_09254005
• 类别：et
• 出版时间：28 May 2008
• 卷：132
• 期：1
• 页码：116-124
• 文件大小：1264 K

摘要

Humidity sensitive poly(2,5-dimethoxyaniline)/WOb>3b> (PDMA/WOb>3b>) composites with different weight percents of WOb>3b> have been prepared by a simple mechanical mixing method. These composites were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Humidity sensing characteristics, including the resistance versus relative humidity (RH), humidity hysteresis, response time, repeatability and long-term stability of these composites have been investigated. The PDMA/WOb>3b> composites show better sensing properties than pure PDMA, such as higher sensitivity, quicker response and small hysteresis. The resistance of the composite with 30 wt%of WOb>3b> changes linearly over the humidity range (23–84%RH). Furthermore, it exhibits a maximum percentage response factor (border="0">651 at 87%RH), quick response (humidification, 27 s and desiccation, 136 s), narrow hysteresis (border="0">5%) and an excellent repeatability of the response.