Fused filament fabrication is an additive layer manufacturing technique. It was extensively used at the beginning for the manufacturing of prototypes, and it has been adopted during the last few years for the manufacturing of fully functional components. Polyetheretherketone (PEEK) has been thoroughly investigated as a composite matrix because of its outstanding mechanical properties and thermal and chemical stability. This study is focused on PEEK nanocomposites with different amounts of carbon nanotubes (CNTs) (i.e. 3, 5, 10 wt%) produced in the form of a filament and successively 3D printed. The influence of the CNT presence on printability was studied and correlated to the nanocomposite feedstock thermal and microstructural properties, defining a substrate temperature processability window. Interestingly the addition of CNTs significantly limits the processability window due to the influence on the crystallization process and viscosity. Moreover, the thermal and mechanical properties of 3D printed bulk samples were investigated in view of the PEEK/CNT nanocomposite feedstock properties. © 2021 Society of Chemical Industry

中文翻译：

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聚醚醚酮/多壁碳纳米管纳米复合材料的熔丝制备：导热纳米填料对可印刷性和相关性能的影响

熔丝制造是一种附加层制造技术。它最初被广泛用于制造原型，并在过去几年中被用于制造全功能部件。聚醚醚酮 (PEEK) 因其出色的机械性能以及热和化学稳定性而作为复合基质进行了深入研究。这项研究的重点是具有不同数量的碳纳米管 (CNT)（即 3、5、10 重量%）的 PEEK 纳米复合材料，这些碳纳米管以细丝的形式生产并连续 3D 打印。研究了 CNT 存在对可印刷性的影响，并将其与纳米复合原料的热和微观结构特性相关联，从而定义了基材温度可加工性窗口。有趣的是，由于对结晶过程和粘度的影响，CNT 的添加显着限制了可加工性窗口。此外，考虑到 PEEK/CNT 纳米复合材料的原料特性，研究了 3D 打印大块样品的热和机械性能。© 2021 化学工业协会