埃洛石对杂化丙烯酸酯共聚物湿敏膜的灵敏度和稳定性的强化效果  

Enhancing Effect of Halloysite Nanotubes on Sensitivity and Stability of Hybridized Acrylate Copolymer Humidity-sensitive Films

作　　者：宇雪婷 马旭 曹立久 李娜 陈观银 靳焘[1,2,3,4,5,6] 陈玉放 YU Xueting;MA Xu;CAO Lijiu;LI Na;CHEN Guanyin;JIN Tao;CHEN Yufang(Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,China;University of Chinese Academy of Sciences,Beijing 100049,China;CAS Testing Technical Services(Guangzhou)Co.Ltd,Guangzhou 510650,China;CAS Engineering Laboratory for Special Fine Chemicals,Guangzhou 510650,China;CASH GCC Shaoguan Research Institute of Advanced Materials,Shaoguan 512400,China;CASH GCC Fine Chemicals Incubator(Nanxiong)Co.,Ltd,Nanxiong 512400,China)

机构地区：[1]中国科学院广州化学研究所,广东广州510650 [2]中国科学院大学,北京101408 [3]中科检测技术服务(广州)股份有限公司,广东广州510650 [4]中国科学院新型特种精细化学品工程实验室,广东广州510650 [5]国科广化韶关新材料研究院,广东韶关512400 [6]国科广化精细化工孵化器(南雄)有限公司,广东南雄512400

出　　处：《广州化学》2024年第5期1-8,共8页Guangzhou Chemistry

基　　金：重庆自然科学基金(CSTB2022NSCQ-MSX0986)。

摘　　要：聚合物材料在湿敏材料的制备中得到了广泛的应用,但其灵敏度低、响应速度慢、解吸附能力差等问题仍然存在,限制了其发展潜力。本文通过将聚丙烯酸树脂(HAC)与埃洛石纳米管(HNTs)复合,以提高聚丙烯酸树脂阻抗型湿度传感器的湿敏响应性能。采用扫描电子显微镜、透射电子显微镜和原子力显微镜观察材料薄膜的表面形貌特征和粗糙度,证明HNTs的掺杂提高了复合材料的湿敏性能。采用红外光谱仪测试材料的分子结构,证明了HNTs成功掺杂形成复合材料。采用热重分析仪测试材料的热重曲线,表明材料具有良好的热稳定性。采用LCR数字电桥测试叉指电极的阻抗,结果表明,材料的湿敏响应曲线具有高的线性度(r=0.99986)、超快的响应/恢复速度(0.4 s/9.8 s)、小的湿滞(0.78%RH)和低的温变系数(0.013%RH/℃)。采用复阻抗谱法研究了材料的湿度响应机制,在低、中湿度范围内由湿敏材料的本征导电占主导,在高湿度范围内由离子导电性占主导地位。Polymer materials have been extensively utilized in the fabrication of humidity-sensitive materials;however,certain issues such as inadequate sensitivity,sluggish response speed,and insufficient desorption capability still hinder their developmental potential.This study aims to enhance the humidity sensitivity of impedance-type humidity sensors by incorporating polyacrylic resin(HAC)with halloysite nanotubes(HNTs).Scanning electron microscopy,transmission electron microscopy and atomic force microscopy were used to observe the surface topographic features and roughness of the material films,which demonstrated that the doping of HNTs improved the humidity-sensitive performance of the composite.The molecular structure of the materials was tested by infrared spectroscopy,which proved the successful doping of HNTs to form the composites.The thermogravimetric curve of the material was tested using a thermogravimetric analyzer,which showed that the material had good thermal stability.The impedance of the fork finger electrode was tested using an LCR digital bridge,and the results showed that the moisture-sensitive response curve of the material had a high linearity(r=0.99986),ultra-fast response/recovery speed(0.4 s/9.8 s),small wet hysteresis(0.78%RH),and a low temperature coefficient of variation(0.013%RH/℃).The humidity response mechanism of the materials was investigated using complex impedance spectroscopy,which was dominated by the intrinsic conductivity of the humidity-sensitive materials in the low and medium humidity ranges,and by the ionic conductivity in the high humidity range.

关 键 词：埃洛石纳米管 杂化丙烯酸酯共聚物 复合湿敏膜 湿度传感器 

分 类 号：TB332[一般工业技术—材料科学与工程]