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首页> 外文期刊>Journal of Applied Polymer Science >Poly(vinylidene fluoride)/thermoplastic polyurethane flexible and 3D printable conductive composites
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Poly(vinylidene fluoride)/thermoplastic polyurethane flexible and 3D printable conductive composites

机译：聚（偏二氟乙烯）/热塑性聚氨酯柔性和3D可印刷导电复合材料

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摘要

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.
机译：这项工作的重点是开发聚合物共混物，以生产具有增强电气和机械性能的多功能3D打印材料。在此背景下，通过压缩成型、长丝挤出和熔融长丝制造，制备了由填充有炭黑聚吡咯（CB-PPy）的聚偏氟乙烯/热塑性聚氨酯（PVDF/TPU）组成的柔性和高导电材料。为了实现导电性、机械性能和印刷适性之间的最佳折衷，对共混物组成进行了优化，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%共连续共混物的导电率高于PVDF/TPU 50/50 wt%（即38/62 vol%）复合材料的导电率。填充率为6.77%（体积分数）的PVDF/TPU/CB PPy 3D打印样品的电导率为4.14 S m（-1），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复合材料是一种很有前途的技术应用材料。

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