将 BNNS 限制在互锁的 Al2O3 板状骨架中，构建类似纸牌屋的网络，用于导热环氧树脂复合材料

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2024-10-09 DOI:10.1016/j.compositesa.2024.108513

Fanjun Guo , Tao You , Kangle Xue , Jun Li , Li Liu , Yudong Huang

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引用次数: 0

摘要

构建三维填料网络是提高环氧树脂导热性能的有效策略，但它仍然受到传导通道断开的严重限制。本文以商用聚氨酯为模板，将 BNNS 组装到原位成型的互锁 Al2O3 板材骨架中，开发出了一种具有连续传导通道的独创互锁混合骨架，通过烧结建立了较大的 Al2O3 板材晶间接触面积，从而大大降低了接触热阻。此外，互锁的 Al2O3 骨架与氢键作用下的 BNNS 相结合，进一步提高了其导热性。当 Al2O3 含量为 15.3 Vol%、BNNS 含量为 11.4 Vol%时，优化的 Al2O3/BNNS/EP 复合材料的热导率为 5.01 W/mK，远高于纯环氧树脂的 1904.0%。同时，互锁杂化骨架为环氧树脂提供了低介电损耗、令人满意的热稳定性和阻燃性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Constructing house-of-cards-like networks with BNNS confined in interlocking Al2O3 platelet skeletons for thermally conductive epoxy composites

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Constructing house-of-cards-like networks with BNNS confined in interlocking Al2O3 platelet skeletons for thermally conductive epoxy composites

The construction of 3D filler networks is an effective strategy to improve the thermal conductivity of epoxy resins, yet it is still severely limited by the disconnection of conduction channels. In this contribution, an original interlocking hybrid skeleton with continuous conduction channels was developed by assembling BNNS into an in situ-formed interlocking Al₂O₃ platelet skeleton using commercial polyurethane as a template, where large intergranular contact areas of Al₂O₃ platelets were established by sintering to greatly decrease the contact thermal resistance. Besides, the interlocking Al₂O₃ skeleton coupled with BNNS under hydrogen bonding endowed further improvement of its thermal conductivity. The optimized Al₂O₃/BNNS/EP composite displayed an excellent thermal conductivity of 5.01 W/mK at 15.3 vol% of Al₂O₃ and 11.4 vol% of BNNS loading, far higher than that of neat epoxy resin by 1904.0 %. Meanwhile, the interlocking hybrid skeleton provided the epoxy resin with low dielectric loss, satisfactory thermal stability and flame retardancy.

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.