Abstract Carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) are extremely ideal nanofillers for applications in damping polymer. This work explores the damping behavior of polymer nanocomposite beams made of epoxy resin reinforced with CNTs and GNPs experimentally. Beam specimens for the vibration tests together with dynamic mechanical analysis (DMA) are fabricated with different weight ratios of CNTs and GNPs, upon which DMA and free vibration tests are conducted. Scanning electron microscope images are also obtained to check the dispersion of nanofillers in microscale. It is found that the first-order loss factor of composite beam specimens shows a rise of 41.1% at 0.4 wt% CNT content compared with that of pure epoxy, while the first-order loss factor of composite beam specimens with 0.025 wt% GNP content increases up by 128.9%. The maximum value of the first-order loss factor of nanocomposite beams with GNP reinforcement is 62.2% higher than that with CNTs.

中文翻译：

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碳纳米管与石墨烯纳米片增强的环氧纳米复合梁阻尼性能对比实验研究

摘要 碳纳米管（CNTs）和石墨烯纳米片（GNPs）是非常理想的用于阻尼聚合物的纳米填料。这项工作通过实验探索了由 CNT 和 GNP 增强的环氧树脂制成的聚合物纳米复合材料梁的阻尼行为。用不同重量比的 CNT 和 GNP 制造用于振动测试和动态力学分析 (DMA) 的梁试样，并在其上进行 DMA 和自由振动测试。还获得了扫描电子显微镜图像以检查纳米填料在微米尺度上的分散情况。研究发现，在 0.4 wt% CNT 含量下，复合梁试件的一阶损耗因子较纯环氧树脂提高 41.1%，而在 GNP 含量为 0.025 wt% 的复合梁试件的一阶损耗因子增加了 128。9%。采用 GNP 增强的纳米复合材料梁的一阶损耗因子最大值比采用 CNT 的高 62.2%。