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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimentally measured thermal transport properties of aluminum-polytetrafluoroethylene nanocomposites with graphene and carbon nanotube additives
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Experimentally measured thermal transport properties of aluminum-polytetrafluoroethylene nanocomposites with graphene and carbon nanotube additives

机译：实验测量的含石墨烯和碳纳米管添加剂的铝-聚四氟乙烯纳米复合材料的热传输性能

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摘要

Reactive materials such as aluminum (Al) and polytetrafluoroethylene (Teflon) are used for energy generation applications and specifically in ordnance technologies. With the advent of nanotechnology various nano-scale additives have become incorporated into reactive material formulations with the hope of enhanced performance. An important component to the study of energy generation is an examination of energy transport through a reactant matrix. This study examines an experimental approach to quantifying thermal properties of an Al/Teflon nanocomposite reactant matrix that has been impregnated with carbon additives. Various structures of carbon are investigated and include amorphous nanoscale carbon spheres (nano C), graphene flakes and unaligned multiwalled carbon nanotubes (CNTs). The additives were selected based on their completely different structures with the hypothesis that the structure of the additive will influence the thermal transport properties of the matrix. Results show graphene has the greatest influence on the thermophysical properties. For example, thermal conductivity of the composites containing graphene increased by 98%. Craphene similarly enhanced the thermal diffusivity and specific heat of the Al/Teflon matrix. Conversely, nano C and CNTs decreased the thermal conductivity and thermal diffusivity of the samples significantly.
机译：诸如铝（Al）和聚四氟乙烯（Teflon）之类的反应性材料用于能源发电应用，尤其是在军械技术中。随着纳米技术的出现，各种纳米级添加剂已被掺入到反应性材料配方中，以期提高性能。能量产生研究的重要组成部分是检查通过反应物基质的能量传输。这项研究研究了一种量化Al / Teflon纳米复合反应物基质热性能的实验方法，该基质已被碳添加剂浸渍。研究了碳的各种结构，包括无定形的纳米级碳球（纳米碳），石墨烯薄片和未排列的多壁碳纳米管（CNT）。根据添加剂的完全不同的结构选择添加剂，并假设添加剂的结构将影响基体的热传输性能。结果表明，石墨烯对热物理性质的影响最大。例如，含石墨烯的复合材料的热导率提高了98％。克雷芬类似地提高了Al / Teflon基体的热扩散率和比热。相反，纳米碳和碳纳米管显着降低了样品的热导率和热扩散率。

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