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具有特定设计气腔的轻质3D打印石墨烯基圆盘热性能的实验、理论和数值研究

Experimental, Theoretical and Numerical Studies on Thermal Properties of Lightweight 3D Printed Graphene-Based Discs with Designed Ad Hoc Air Cavities.

作者信息

Spinelli Giovanni, Guarini Rosella, Kotsilkova Rumiana, Ivanov Evgeni, Romano Vittorio

机构信息

Faculty of Transport Sciences and Technologies, University of Study "Giustino Fortunato", Via Raffaele Delcogliano 12, 82100 Benevento, Italy.

Institute of Mechanics, Bulgarian Academy of Sciences, Acadamy. G. Bonchev Str., Block 4, 1113 Sofia, Bulgaria.

出版信息

Nanomaterials (Basel). 2023 Jun 15;13(12):1863. doi: 10.3390/nano13121863.

DOI:10.3390/nano13121863
PMID:37368293
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10302392/
Abstract

The current state of the art on material science emphasizes recent research efforts aimed at designing novel materials characterized by low-density and advanced properties. The present article reports the experimental, theoretical and simulation results on the thermal behavior of 3D printed discs. Filaments of pure poly (lactic acid) PLA and filled with 6 wt% of graphene nanoplatelets (GNPs) are used as feedstocks. Experiments indicate that the introduction of graphene enhances the thermal properties of the resulting materials since the conductivity passes from the value of 0.167 [W/mK] for unfilled PLA to 0.335 [W/mK] for reinforced PLA, which corresponds to a significantly improvement of 101%. Exploiting the potential of 3D printing, different air cavities have been intentionally designed to develop new lightweight and more cost-effective materials without compromising their thermal performances. Furthermore, some cavities are equal in volume but different in the geometry; it is necessary to investigate how this last characteristic and its possible orientations affect the overall thermal behavior compared to that of an air-free specimen. The influence of air volume is also investigated. Experimental results are supported by theoretical analysis and simulation studies based on the finite element method. The results aim to be a valuable reference resource in the field of design and optimization of lightweight advanced materials.

摘要

材料科学的当前技术水平强调了近期旨在设计具有低密度和先进性能的新型材料的研究工作。本文报道了3D打印圆盘热行为的实验、理论和模拟结果。使用纯聚乳酸（PLA）细丝以及填充了6 wt%石墨烯纳米片（GNPs）的细丝作为原料。实验表明，石墨烯的引入增强了所得材料的热性能，因为未填充PLA的电导率为0.167 [W/mK]，而增强PLA的电导率为0.335 [W/mK]，这相当于显著提高了101%。利用3D打印的潜力，特意设计了不同的气腔，以开发新的轻质且更具成本效益的材料，同时不影响其热性能。此外，一些气腔体积相等但几何形状不同；有必要研究与无气样本相比，这一最后特性及其可能的取向如何影响整体热行为。还研究了气腔体积的影响。实验结果得到了基于有限元方法的理论分析和模拟研究的支持。这些结果旨在成为轻质先进材料设计和优化领域的宝贵参考资源。

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