通过垂直排列轻质软石墨烯泡沫实现高性能热界面材料

IF 9.5 2区 材料科学 Q1 CHEMISTRY, PHYSICAL Nano Research Pub Date : 2024-09-27 DOI:10.1007/s12274-024-6985-7
Huaqiang Fu, Renqiang Fang, Chao Tian, Wei Qian, Shiya Cao, Ziran Zhang, Xiaoxi Xu, Chuang Yao, Zhe Wang, Daping He
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引用次数: 0

摘要

高性能热界面材料(TIMs)是现代电子产品所孜孜以求的。二维(2D)材料作为垂直排列的填充物可以优化平面外热导率(k⊥),但其含量过高或固有的刚性会降低热界面材料的柔软性,导致热接触电阻(Rcontact)恶化。在本研究中,二维石墨烯材料被制成轻质柔软的高取向石墨烯泡沫 (GF),作为垂直填充框架,以优化垂直 GF (VGF) TIM 的 k⊥ 和 Rcontact。在石墨烯含量较低的 15.5 wt.% 条件下,VGF-TIM 的 k⊥ 高达 47.9 W-m-1-K-1。由于石墨烯的柔软性和较低的填料含量,VGF-TIM 显示出较低的压缩模量(4.2 兆帕),表现出优异的可压缩性。由此产生的 TIM 具有 24.4 K-mm2-W-1 的低接触电阻,与商用先进 TIM 相比,在实际散热情况下冷却效率提高了 185.1%。这项研究为先进 TIM 的设计及其在热管理中的应用提供了指导。
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High-performance thermal interface materials enabled by vertical alignment of lightweight and soft graphene foams

High-performance thermal interface materials (TIMs) are highly sought after for modern electronics. Two-dimensional (2D) materials as vertical aligned fillers can optimize the out-plane thermal conductivity (k), but their excessively high content or intrinsic rigidness deteriorate TIMs softness, leading to worsening for thermal contact resistance (Rcontact). In this study, 2D graphene materials are fabricated into lightweight and soft graphene foams (GFs) with high-orientation, acting as vertical filler frameworks to optimize the k and Rcontact for vertical GF (VGF) TIMs. The VGF-TIM has a high k of 47.9 W·m−1·K−1 at a low graphene content of 15.5 wt.%. Due to the softness and low filler contents of GFs, the VGF-TIM exhibits a low compressive module (4.2 MPa), demonstrating excellent compressibility. The resulting TIM exhibit a low contact resistance of 24.4 K·mm2·W−1, demonstrating 185.1% higher cooling efficiency in practical heat dissipating scenario compared to commercial advanced TIMs. This work provides guidelines for the design of advanced TIMs and their applications in thermal management.

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来源期刊
Nano Research
Nano Research 化学-材料科学:综合
CiteScore
14.30
自引率
11.10%
发文量
2574
审稿时长
1.7 months
期刊介绍: Nano Research is a peer-reviewed, international and interdisciplinary research journal that focuses on all aspects of nanoscience and nanotechnology. It solicits submissions in various topical areas, from basic aspects of nanoscale materials to practical applications. The journal publishes articles on synthesis, characterization, and manipulation of nanomaterials; nanoscale physics, electrical transport, and quantum physics; scanning probe microscopy and spectroscopy; nanofluidics; nanosensors; nanoelectronics and molecular electronics; nano-optics, nano-optoelectronics, and nano-photonics; nanomagnetics; nanobiotechnology and nanomedicine; and nanoscale modeling and simulations. Nano Research offers readers a combination of authoritative and comprehensive Reviews, original cutting-edge research in Communication and Full Paper formats. The journal also prioritizes rapid review to ensure prompt publication.
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