Qi Rongrong, Zhang Tong, Guan Xin, Dai Jianxun, Liu Sen, Zhao Hongran, Fei Teng
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China; State Key Laboratory of Transducer Technology, Shanghai 200050, PR China.
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, PR China.
J Colloid Interface Sci. 2020 Apr 1;565:592-600. doi: 10.1016/j.jcis.2020.01.062. Epub 2020 Jan 17.
Owing to the outstanding dielectric properties derived from the conjugated π-electron systems, conjugated polymers have been explored and developed in capacitive humidity sensors for a few decades. In this work, a series of composites - mesoporous silica and semiconducting polymers - MCM-41 (MCM, Mesoporous Crystalline Material)/PEDOT (poly(3,4-ethylenedioxythiophene)) were chemically obtained by in-situ polymerization at 0 °C, while the amounts of PEDOT were adjusted by different evaporation times of EDOT (3,4-ethylenedioxythiophene) in the porous MCM-41 film. Additionally, it was able to modulate both the dielectricity and porosity of the composites via this convenient approach. The obtained capacitive humidity sensors based on MCM-41/PEDOT composites exhibit much better sensing performance than their bulk counterparts, with wider humidity sensing range, higher sensitivity and much faster response speed.
由于共轭π电子系统具有出色的介电性能，共轭聚合物在电容式湿度传感器领域已被研究和开发了数十年。在这项工作中，通过在0°C下原位聚合化学合成了一系列复合材料——介孔二氧化硅和半导体聚合物——MCM-41（MCM，介孔晶体材料）/PEDOT（聚（3,4-乙撑二氧噻吩）），同时通过在多孔MCM-41薄膜中不同的EDOT（3,4-乙撑二氧噻吩）蒸发时间来调节PEDOT的量。此外，通过这种简便的方法能够调节复合材料的介电性和孔隙率。基于MCM-41/PEDOT复合材料制备的电容式湿度传感器表现出比其本体材料更好的传感性能，具有更宽的湿度传感范围、更高的灵敏度和更快的响应速度。
