Yu Lan, Park Ji Sun, Lim Yun-Soo, Lee Churl Seung, Shin Kwonwoo, Moon Ho Jun, Yang Cheol-Min, Lee Young Sil, Han Jong Hun
Department of Materials Science and Engineering, Myongji University, Yongin 449-728, Republic of Korea. Energy Nano Materials Research Center, Korea Electronics Technology Institute (KETI), Seongnam 463-816, Republic of Korea.
Nanotechnology. 2013 Apr 19;24(15):155604. doi: 10.1088/0957-4484/24/15/155604. Epub 2013 Mar 26.
Carbon nanomaterials are generally used to promote the thermal conductivity of polymer composites. However, individual graphene nanoplatelets (GNPs) or carbon nanotubes (CNTs) limit the realization of the desirable thermal conductivity of the composite in both through- and in-plane directions. In this work, we present the thermal conductivity enhancement of the epoxy composite with carbon hybrid fillers composed of CNTs directly grown on the GNP support. The composite with 20 wt% hybrid filler loading showed 300% and 50% through-plane thermal conductivity improvements in comparison with the individual CNTs and GNPs, respectively. Moreover, it showed an enhanced thermal conductivity of up to 12% higher than that of the simply mixed GNP and CNT fillers. In more detail, hybrid fillers, whose CNTs were synthesized on the GNP support (Support C, Fe/Mo-MgO:GNP=1:0.456) for 60 min via chemical vapor deposition process, presented the highest through-plane thermal conductivity of 2.41 W m K in an epoxy composite.
碳纳米材料通常用于提高聚合物复合材料的热导率。然而，单独的石墨烯纳米片（GNPs）或碳纳米管（CNTs）限制了复合材料在面内和面外方向上实现所需的热导率。在这项工作中，我们展示了由直接生长在GNP载体上的CNTs组成的碳混合填料增强环氧复合材料的热导率。与单独的CNTs和GNPs相比，混合填料含量为20 wt%的复合材料的面外热导率分别提高了300%和50%。此外，它的热导率比简单混合的GNP和CNT填料提高了12%。更详细地说，通过化学气相沉积法在GNP载体（载体C，Fe/Mo-MgO:GNP = 1:0.456）上合成60分钟的CNTs的混合填料，在环氧复合材料中呈现出最高的面外热导率2.41 W m⁻¹ K⁻¹。
