The nano polypyrrole (PPy) and carbon nano tubes (CNT) are known for their excellent charge carrying capacities, thermal stability, conductivity and polyvinylidene fluoride (PVDF) for their inherent piezoelectricity and biocompatibility. The mechanical blending of these materials to form a feedstock filament can be an excellent input for the 3D printing of customized sensors for biomedical applications. But hitherto little has been reported on rheological, thermal, electrical, mechanical and morphological properties of PPy/CNT reinforced PVDF especially for 3D printing of customized sensors. In this study, the twin screw compounding has been used to prepare feedstock filaments of PVDF, PVDF-2.5%CNT, PVDF-2.5%PPy and PVDF-2.5% (CNT + PPy) to explore feasibility of sensor 3D printing for biomedical applications. Further, the feedstock filaments were subjected to thermal, mechanical, morphological investigations. The results of study show that addition of PPy and CNT in PVDF matrix has improved the specific heat capacity, elongation and charge capacity significantly.

中文翻译：

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用于 3D 打印应用的纳米聚吡咯和碳纳米管增强 PVDF：流变、热、电、机械、形态表征

纳米聚吡咯 (PPy) 和碳纳米管 (CNT) 以其优异的电荷承载能力、热稳定性、导电性和聚偏二氟乙烯 (PVDF) 的固有压电性和生物相容性而闻名。这些材料的机械混合形成原料丝可以成为用于生物医学应用的定制传感器的 3D 打印的极好输入。但迄今为止，关于 PPy/CNT 增强 PVDF 的流变学、热学、电学、机械和形态学特性的报道很少，尤其是用于定制传感器的 3D 打印。在本研究中，双螺杆复合已用于制备 PVDF、PVDF-2.5%CNT、PVDF-2.5%PPy 和 PVDF-2.5% (CNT + PPy) 的原料长丝，以探索传感器 3D 打印在生物医学应用中的可行性。更多，对原料长丝进行了热、机械和形态研究。研究结果表明，在PVDF基体中加入PPy和CNT显着提高了比热容、伸长率和充电容量。