This work focus on the development of polymeric blends to produce multifunctional materials for 3D printing with enhanced electrical and mechanical properties. In this context, flexible and highly conductive materials comprising poly(vinylidene fluoride)/thermoplastic polyurethane (PVDF/TPU) filled with carbon black‐polypyrrole (CB‐PPy) were prepared by compression molding, filament extrusion and fused filament fabrication. In order to achieve an optimal compromise between electrical conductivity, mechanical properties and printability, blends composition was optimized and different CB‐PPy content were added. Overall, the electrical conductivities of PVDF/TPU 50/50 vol% co‐continuous blend were higher than those found for PVDF/TPU 50/50 wt% (i.e., 38/62 vol%) composites at same filler content. PVDF/TPU/CB‐PPy 3D printed samples with 6.77 vol% filler fraction presented electrical conductivity of 4.14 S m⁻¹ and elastic modulus, elongation at break and maximum tensile stress of 0.43 GPa, 10.3% and 10.0 MPa, respectively. These results highlight that PVDF/TPU/CB‐PPy composites are promising materials for technological applications.

中文翻译：

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聚偏氟乙烯/热塑性聚氨酯柔性和3D可打印导电复合材料

这项工作专注于聚合物共混物的开发，以生产具有增强的电气和机械性能的3D打印多功能材料。在这种情况下，通过压缩成型，长丝挤出和熔融长丝制造，制备了填充有炭黑-聚吡咯（CB-PPy）的柔性高导电材料，包括聚偏二氟乙烯/热塑性聚氨酯（PVDF / TPU）。为了在电导率，机械性能和可印刷性之间取得最佳折衷，优化了共混物的组成并添加了不同的CB-PPy含量。总体而言，在相同填料含量下，PVDF / TPU 50/50 vol％共连续共混物的电导率高于PVDF / TPU 50/50 wt％（即38/62 vol％）复合材料的电导率。PVDF / TPU / CB‐PPy具有6的3D打印样品。^-1和弹性模量，断裂伸长率和最大拉伸应力分别为0.43 GPa，10.3％和10.0 MPa。这些结果表明，PVDF / TPU / CB-PPy复合材料是用于技术应用的有前途的材料。