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Superior Damping of Hybrid Carbon Fiber Composites Grafted by ZnO Nanorods

机译：ZnO Nanorods接枝杂交碳纤维复合材料的优越阻尼

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The elevated specific strength of fiber reinforced plastics (FRP) is the prominent drive for their ever-growing applications. Their inadequate vibrational damping properties prevent them from replacing conventional metal alloys for certain structural applications. In this study we attempt to utilize a low temperature hydrothermal synthesis to grow ZnO nanorods on the surface of woven carbon fibers and implement the resulting hybridized fibers in an epoxy matrix composite. X-ray diffraction and scanning electron microscopy are carried out to study the morphology of the surface-grown nanorods and their adhesion to the substrate carbon fibers. Two-layered hybrid composite laminas are tested for their structural damping properties using dynamic mechanical analysis (DMA). It is observed that the ZnO nanorods can enhance the damping figure of merit of the composites by 40% without a major delineation in the storage modulus. The enhanced damping performance can be attributed to the additional surfaces manifested by the presence of the ZnO nanorods and, consequently, augmenting the sliding and frictional mechanisms. Furthermore, ZnO as piezoelectric material has the energy scavenging advantages over other 1D nanostructures which ultimately constitutes the fabricated hybrid composites as a multifunctional structural material for energy harvesting applications.
机译：纤维增强塑料（FRP）的升高强度是他们不断增长的应用的突出驱动。它们不充分的振动阻尼性能防止它们更换常规金属合金以进行某些结构应用。在该研究中，我们试图利用低温水热合成来生长编织碳纤维表面上的ZnO纳米棒，并在环氧基质复合材料中实现所得杂交的纤维。进行X射线衍射和扫描电子显微镜，以研究表面生长的纳米棒的形态及其对基板碳纤维的粘附性。使用动态机械分析（DMA）测试两个层状混合复合薄层的结构阻尼性能。观察到ZnO纳米棒可以增强复合材料的衰减图40％而在储存模量中没有重大描绘。增强的阻尼性能可以归因于通过ZnO纳米棒的存在而表现的附加表面，从而增加了滑动和摩擦机制。此外，作为压电材料的ZnO具有优于其他1D纳米结构的能量清除优点，这最终构成了制造的混合复合材料作为用于能量收集应用的多功能结构材料。

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