Capacitive humidity sensors based on mesoporous silica and poly(3,4-ethylenedioxythiophene) composites.,Journal of Colloid and Interface Science

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Capacitive humidity sensors based on mesoporous silica and poly(3,4-ethylenedioxythiophene) composites.
Journal of Colloid and Interface Science ( IF 9.4 ) Pub Date : 2020-01-17 , DOI: 10.1016/j.jcis.2020.01.062
Rongrong Qi ₁ , Tong Zhang ₂ , Xin Guan ₂ , Jianxun Dai ₂ , Sen Liu ₂ , Hongran Zhao ₂ , Teng Fei ₁

Affiliation

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.

中文翻译：

基于介孔二氧化硅和聚（3,4-乙撑二氧噻吩）复合材料的电容式湿度传感器。

由于源自共轭π电子系统的出色介电性能，共轭聚合物已在电容式湿度传感器中进行了数十年的研究和开发。在这项工作中，在0°C下通过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）），同时通过多孔MCM-41膜中EDOT（3,4-乙撑二氧噻吩）的不同蒸发时间来调节PEDOT的量。另外，通过这种方便的方法，它能够调节复合材料的介电常数和孔隙率。所获得的基于MCM-41 / PEDOT复合材料的电容式湿度传感器的感测性能要优于其同类产品，

更新日期：2020-01-17

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