As an elastomer, poly(dimethylsiloxane) (PDMS) is used in various applications such as wearable technology and sealants, and is especially preferred in microelectromechanical device production due to its advantage in fabrication of microstructures. However, some of its applications such as sensor-based or electrode-based are limited due to its insulator aspect. Various conductive nanomaterials such as carbon nanotubes (CNTs), graphene, graphite, carbon black, and silver nanoparticles were incorporated into the PDMS matrix for the production of conductive nanocomposites. In this study, we produced highly conductive PDMS nanocomposites by addition of multiwalled carbon nanotubes (MWCNTs) and graphene nanoplatelets (GNPs) in a three-dimensional network. Due to the synergistic effect between CNTs and GNPs inside a polymeric matrix, we expected to obtain PDMS nanocomposites more conductive than nanocomposites with only CNTs. Additionally, we investigated the effect of sulfuric acid treatment on the electrical conductivity and surface composition of prepared PDMS/MWCNT/GNP nanocomposites. Results indicated that the electrical conductivity in sulfuric acid-treated samples was significantly higher than in untreated samples. Levels of conductivity in the range of 270.7–1074.8 S/m were achieved; the higher ones were the samples treated with sulfuric acid solution.

中文翻译：

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基于弹性体的高导电杂化纳米复合材料的生产和硫酸处理

作为弹性体，聚二甲基硅氧烷 (PDMS) 被用于各种应用，例如可穿戴技术和密封剂，并且由于其在微结构制造方面的优势，特别适用于微机电设备生产。然而，由于其绝缘体方面，它的一些应用（例如基于传感器或基于电极）受到限制。将各种导电纳米材料，如碳纳米管 (CNT)、石墨烯、石墨、炭黑和银纳米颗粒加入到 PDMS 基质中，用于生产导电纳米复合材料。在这项研究中，我们通过在三维网络中添加多壁碳纳米管 (MWCNT) 和石墨烯纳米片 (GNP) 来生产高导电性的 PDMS 纳米复合材料。由于聚合物基体内的 CNTs 和 GNPs 之间的协同作用，我们期望获得比仅含有 CNT 的纳米复合材料导电性更高的 PDMS 纳米复合材料。此外，我们研究了硫酸处理对制备的 PDMS/MWCNT/GNP 纳米复合材料的电导率和表面组成的影响。结果表明，硫酸处理样品的电导率显着高于未处理样品。达到了 270.7–1074.8 S/m 范围内的电导率水平；较高的是用硫酸溶液处理的样品。结果表明，硫酸处理样品的电导率显着高于未处理样品。达到了 270.7–1074.8 S/m 范围内的电导率水平；较高的是用硫酸溶液处理的样品。结果表明，硫酸处理样品的电导率显着高于未处理样品。达到了 270.7–1074.8 S/m 范围内的电导率水平；较高的是用硫酸溶液处理的样品。