Effects of alignment and size of fillers on the thermal conductivity of magnetic-responsive exfoliated graphite@BN epoxy composites

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Carbon Letters Pub Date : 2024-04-13 DOI:10.1007/s42823-024-00729-x

Hyunji Shin, Seo Mi Yang, Jae Seo Park, Seung Jae Yang

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Abstract

Efforts have been extensively undertaken to tackle overheating problems in advanced electronic devices characterized by high performance and integration levels. Thermal interface materials (TIMs) play a crucial role in connecting heat sources to heat sinks, facilitating efficient heat dissipation and thermal management. On the other hand, increasing the content of TIMs for high thermal conductivity often poses challenges such as poor dispersion and undesired heat flow pathways. This study aims to enhance the through-plane heat dissipation via the magnetic alignment of a hybrid filler system consisting of exfoliated graphite (EG) and boron nitride (BN). The EG acts as a distributed scaffold in the polymer matrix, while the BN component of the hybrid offers high thermal conductivity. Moreover, the magnetic alignment technique promotes unidirectional heat transfer pathways. The hybrid exhibited an impressive thermal conductivity of 1.44 W m⁻¹ K⁻¹ at filler contents of 30 wt. %, offering improved thermal management for advanced electronic devices.

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填料的排列和尺寸对磁响应剥离石墨@BN 环氧树脂复合材料热导率的影响

人们一直在努力解决以高性能和高集成度为特点的先进电子设备中的过热问题。热界面材料（TIM）在连接热源和散热器、促进高效散热和热管理方面发挥着至关重要的作用。另一方面，增加热界面材料的含量以获得高热导率往往会带来一些挑战，如分散性差和热流路径不理想。本研究旨在通过由剥离石墨（EG）和氮化硼（BN）组成的混合填料系统的磁性排列来增强通平面散热。剥离石墨在聚合物基体中起到分布式支架的作用，而混合填料中的氮化硼成分则具有高导热性。此外，磁性排列技术促进了单向传热途径。在填充物含量为 30 wt. % 的情况下，这种混合材料的热导率高达 1.44 W m-1 K-1，为先进的电子设备提供了更好的热管理。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.