Quaresma Luciano J B, Oliveira Dhonata S C, Dias Rosielem S, Alves Kelly C, de Barros Luiz G D, Pessin Gustavo, Sinatora Amilton, Paraguassu Waldeci, Dos Reis Marcos A L
Graduate Program in Materials Science and Engineering, Federal University of Pará, Ananindeua, PA, Brazil.
3D Nanostructuring Laboratory, Federal University of Pará, Belém, PA, Brazil.
Sci Rep. 2024 Oct 25;14(1):25297. doi: 10.1038/s41598-024-76028-2.
Nanocomposites based on carbon nanotubes (CNTs) are suitable for sensors, due to matrix ability to incorporate nanotube properties. Thus, we developed a low-cost, nanostructured poly(acrylonitrile-butadiene-styrene) (ABS) polymer piezoresistive sensor produced by additive manufacturing. For this, solution layers of acetone, dimethylformamide and CNTs functionalized with carboxylic acid were pulverized on an ABS substrate using an aerograph. Electrical characterization revealed an anisotropic piezoresistive response of the material, induced by the printing lines direction. Field Emission Gun-Scanning Electron Microscopy showed the nanostructured film spreading after five layers of CNTs as well as the random entanglement of nanotubes on parallel and perpendicular 3D-printed ABS substrates. Raman spectroscopy indicated compression and p-type doping of CNTs in interaction with the polymer, as seen mainly by the blueshift of the G and 2D subbands. The results show that the material is promising for pressure sensors, with potential applications in robotic haptic feedback systems.
基于碳纳米管（CNT）的纳米复合材料适用于传感器，这是因为基体能够融合纳米管的特性。因此，我们开发了一种通过增材制造生产的低成本、纳米结构的聚（丙烯腈-丁二烯-苯乙烯）（ABS）聚合物压阻传感器。为此，使用喷枪将丙酮、二甲基甲酰胺和用羧酸官能化的碳纳米管的溶液层喷在ABS基板上。电学表征揭示了由印刷线路方向引起的材料各向异性压阻响应。场发射枪扫描电子显微镜显示，在五层碳纳米管之后纳米结构薄膜得以铺展，以及纳米管在平行和垂直的3D打印ABS基板上的随机缠结。拉曼光谱表明，碳纳米管与聚合物相互作用时发生了压缩和p型掺杂，主要表现为G和2D子带的蓝移。结果表明，该材料在压力传感器方面具有应用前景，在机器人触觉反馈系统中具有潜在应用价值。
