Paari-Molnar Emese, Kardos Kinga, Told Roland, Simon Imre, Sahai Nitin, Szabo Peter, Bovari-Biri Judit, Steinerbrunner-Nagy Alexandra, Pongracz Judit E, Rendeki Szilard, Maroti Peter
3D Printing and Visualization Centre, University of Pecs, Boszorkany Str. 2, H-7624 Pecs, Hungary.
Medical Skills Education and Innovation Centre, Medical School, University of Pecs, Szigeti Str. 12, H-7624 Pecs, Hungary.
Polymers (Basel). 2024 Sep 17;16(18):2625. doi: 10.3390/polym16182625.
Conductive polymer composites are commonly present in flexible electrodes for neural interfaces, implantable sensors, and aerospace applications. Fused filament fabrication (FFF) is a widely used additive manufacturing technology, where conductive filaments frequently contain carbon-based fillers. In this study, the static and dynamic mechanical properties and the electrical properties (resistance, signal transmission, resistance measurements during cyclic tensile, bending and temperature tests) were investigated for polylactic acid (PLA)-based, acrylonitrile butadiene styrene (ABS)-based, thermoplastic polyurethane (TPU)-based, and polyamide (PA)-based conductive filaments with carbon-based additives. Scanning electron microscopy (SEM) was implemented to evaluate the results. Cytotoxicity measurements were performed. The conductive ABS specimens have a high gauge factor between 0.2% and 1.0% strain. All tested materials, except the PA-based conductive composite, are suitable for low-voltage applications such as 3D-printed EEG and EMG sensors. ABS-based and TPU-based conductive composites are promising raw materials suitable for temperature measuring and medical applications.
导电聚合物复合材料通常存在于用于神经接口、可植入传感器和航空航天应用的柔性电极中。熔融长丝制造（FFF）是一种广泛使用的增材制造技术，其中导电长丝通常含有碳基填料。在本研究中，对含有碳基添加剂的聚乳酸（PLA）基、丙烯腈-丁二烯-苯乙烯（ABS）基、热塑性聚氨酯（TPU）基和聚酰胺（PA）基导电长丝的静态和动态力学性能以及电学性能（电阻、信号传输、循环拉伸、弯曲和温度测试期间的电阻测量）进行了研究。采用扫描电子显微镜（SEM）对结果进行评估。进行了细胞毒性测量。导电ABS试样在0.2%至1.0%应变之间具有较高的应变片系数。除PA基导电复合材料外，所有测试材料都适用于3D打印脑电图和肌电图传感器等低压应用。ABS基和TPU基导电复合材料是适用于温度测量和医疗应用的有前景的原材料。
