School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
ACS Nano. 2012 May 22;6(5):4288-97. doi: 10.1021/nn300857d. Epub 2012 Apr 18.
The tensile properties of carbon nanotube (CNT) fibers have been widely studied. However, the knowledge of their compressive properties is still lacking. In this work, the compressive properties of both pure CNT fibers and epoxy infiltrated CNT fibers were studied using the tensile recoil measurement. The compressive strengths were obtained as 416 and 573 MPa for pure CNT fibers and CNT-epoxy composite fibers, respectively. In addition, microscopic analysis of the fiber surface morphologies revealed that the principal recoil compressive failure mode of pure CNT fiber was kinking, while the CNT-epoxy composite fibers exhibited a failure mode in bending with combined tensile and compressive failure morphologies. The effect of resin infiltration on CNT fiber compressive properties, including the compressive strength and the deformation mode, is discussed. This work expands the knowledge base of the overall mechanical properties of CNT fibers, which are essential for their application in multifunctional composites.
碳纳米管（CNT）纤维的拉伸性能已经得到了广泛的研究。然而，其压缩性能的相关知识仍然缺乏。在这项工作中，通过拉伸后回弹测量，研究了纯 CNT 纤维和环氧树脂浸渍 CNT 纤维的压缩性能。纯 CNT 纤维和 CNT-环氧树脂复合材料纤维的压缩强度分别为 416MPa 和 573MPa。此外，对纤维表面形貌的微观分析表明，纯 CNT 纤维的主要回弹压缩失效模式是扭结，而 CNT-环氧树脂复合材料纤维则表现出弯曲失效模式，同时具有拉伸和压缩失效形态。讨论了树脂浸渍对 CNT 纤维压缩性能的影响，包括压缩强度和变形模式。这项工作扩展了 CNT 纤维整体力学性能的知识库，这对于它们在多功能复合材料中的应用至关重要。
