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Dielectric behavior of thin films of unsaturated polyester‐resin/carbon nanotube semiconductor composites
Polymers for Advanced Technologies ( IF 3.4 ) Pub Date : 2020-08-10 , DOI: 10.1002/pat.4938
Efrat Hochma 1 , Moshe Narkis 1
Affiliation  

Since the discovery of carbon nanotubes (CNT), numerous studies have focused on the development of materials combining CNT with polymer composites to exploit both CNT's remarkable characteristics and the complimentary properties of polymer thin films. In particular, unsaturated polyester resin (UPR) and CNT composite materials have not been studied before. Here we develop and characterize a UPR/CNT‐based capacity resistor gas sensor and apply it on THF vapor. The CNT's high aspect ratio provides the composite with better electrical and mechanical performance than other realizations, such as carbon black. We identify and quantify THF in a wide range of operation frequencies, under SATP conditions, as functions of the vertical distance, sample volume and operation frequency. High sensitivity, reversibility and fast response to the dielectric vapor exposure in microliter volumes are achieved. The results are also analyzed in terms of the possible mechanisms relating to THF/sensor interactions, with good correspondence between the model and measured data.

中文翻译:

不饱和聚酯树脂/碳纳米管半导体复合材料薄膜的介电行为

自从发现碳纳米管(CNT)以来,许多研究都集中在将CNT与聚合物复合材料结合起来的材料的开发上,以充分利用CNT的显着特性和聚合物薄膜的互补特性。特别是,不饱和聚酯树脂(UPR)和CNT复合材料以前没有被研究过。在这里,我们开发并表征基于UPR / CNT的电容式电阻器气体传感器,并将其应用于THF蒸汽。CNT的高纵横比为复合材料提供了比其他实现方式(例如炭黑)更好的电气和机械性能。我们在SATP条件下,根据垂直距离,样品量和操作频率,在宽范围的操作频率中​​识别和定量THF。高灵敏度,实现了微升体积的可逆性和对电介质蒸气暴露的快速响应。还根据与THF /传感器相互作用相关的可能机理分析了结果,并在模型和测量数据之间建立了良好的对应关系。
更新日期:2020-09-08
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