Fabrication of a Cost-effective Piezoresistive Pressure Sensor Based on PVC/Reduced Graphene Oxide (rGO) Composite

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-10-17 DOI:10.24200/sci.2023.62495.7870

Iraj Ahadzadeh, Samira Dabbagh

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Abstract

A cost-effective piezoresistive sensor based on PVC/Reduced graphene oxide (rGO) was fabricated and its performance was investigated. The weight percent range from 0.1 to 30% of rGO in PVC matrix was studied. Composite parts were prepared by using the solution casting method from tetrahydrofurane (THF) solvent followed by solvent evaporation. The plot of electrical conduction versus rGO percentage was constructed to obtain the percolation threshold concentration. It was found that the percolation threshold of rGO leading to a continuous stable electrical conductivity in PVC matrix is about 25% beyond which electrical resistance was reduced from about 800 GΩ to lower than 100 KΩ range. The relative changes in electrical resistance of prepared polymer parts as a result of impact (stress), stretch and bending deformation were studied. The results showed that the fabricated composite can be used for sensing and/or monitoring and measurement of any mechanical displacement with high sensitivity, promising reproducibility and satisfactory durability. It must be mentioned that, during impact tests of polymer composites, a small piezoelectric effect was also observed for which further complimentary studies are being planned to be performed in near future in order to better understand this effect and its underlining molecular basis.

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基于PVC/还原氧化石墨烯(rGO)复合材料的高性价比压阻压力传感器的制备

制备了一种基于PVC/还原氧化石墨烯(rGO)的低成本压阻式传感器，并对其性能进行了研究。研究了还原氧化石墨烯在PVC基体中的重量百分比范围为0.1% ~ 30%。以四氢呋喃(THF)为溶剂，采用溶液浇铸法制备了复合材料零件。构建了电导率与氧化石墨烯百分比的关系图，以获得渗透阈值浓度。研究发现，还原氧化石墨烯的渗透阈值约为25%，使PVC基体的电导率持续稳定，超过该阈值，电阻从800 GΩ左右降低到100 KΩ以下。研究了冲击(应力)变形、拉伸变形和弯曲变形对聚合物制件电阻的影响。结果表明，所制备的复合材料可用于任何机械位移的传感和/或监测和测量，具有高灵敏度，良好的再现性和满意的耐久性。必须指出的是，在聚合物复合材料的冲击试验中，还观察到一种小的压电效应，正在计划在不久的将来对此进行进一步的补充研究，以便更好地了解这种效应及其主要的分子基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.