多功能高取向膨胀石墨纳米板复合材料实现先进的热管理

IF 10.5 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Carbon Pub Date : 2025-07-03 DOI:10.1016/j.carbon.2025.120588

Wendong Liu , Yue Xu , Yuda Su , Yizhe Liu , Zhihui Lei , Peng Tao , Wen Shang , Benwei Fu , Chengyi Song , Tao Deng

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引用次数: 0

摘要

通过对膨胀石墨/水性聚氨酯泡沫进行冻干和压缩，制备了具有高导热性和多功能的高取向石墨纳米片-水性聚氨酯（GNP-WPU）纳米复合材料。利用范德华相互作用结合的高取向GNPs构建了内部有效热传导途径，其面内导热系数可达~ 143 W·m−1·K−1。高取向GNP-WPU纳米复合材料作为大功率发光二极管（led）的热界面材料和散热材料具有优异的性能。此外，GNP-WPU的电热转换特性和电磁干扰屏蔽效果使其在现代电子学中具有多种用途。在极端寒冷的天气里，通过对导电GNP-WPU施加电压产生的热量使电子设备保持温暖。使用厚度为370 μ m的GNP-70 wt%-WPU薄膜时，薄膜的固有导电性和层状结构使其EMI屏蔽效率达到112 dB。此外，阻燃剂的添加使GNP-WPU纳米复合材料在热管理应用中能够自熄，从而使电子设备能够安全运行。本研究提出的GNP-WPU纳米复合材料具有高导热性和多功能性，在先进热管理、航空航天、柔性电子、软机器人和能量转换系统等方面显示出巨大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Multi-functional highly oriented expanded graphite nanoplatelet composites enabling advanced thermal management

查看原文本刊更多论文

Multi-functional highly oriented expanded graphite nanoplatelet composites enabling advanced thermal management

This work presents that highly oriented graphite nanoplatelets-waterborne polyurethane (GNP-WPU) nanocomposites with high thermal conductivity and multi-functionality can be generated by lyophilizing and compressing expanded graphite/WPU foams. Inner effective heat pathways are constructed based on the highly oriented GNPs bonded by van der Waals interaction, and the in-plane thermal conductivity can reach up to ∼143 W

\cdot

m⁻¹

\cdot

K⁻¹. The highly oriented GNP-WPU nanocomposites exhibit superior performance as thermal interface material and heat spreader for the heat dissipation of high-power light-emitting diodes (LEDs). Additionally, the electro-thermal conversion property and electromagnetic interference (EMI) shielding effect of GNP-WPU endow it with multi-functional usage in modern electronics. In extremely cold weather, the heat generated by applying voltage to electrically conductive GNP-WPU keeps electronics warm. The intrinsic electrical conductivity and layered structure of the films lead to EMI shielding effectiveness of 112 dB with the use of the GNP-70 wt%-WPU film with a thickness of 370

μ

m. Furthermore, the addition of flame retardant enables GNP-WPU nanocomposite to self-extinguish in thermal management applications, thus electronics can operate safely. With high thermal conductivity and multi-functionality, GNP-WPU nanocomposites proposed in this work show great potential in advanced thermal management, aerospace crafts, flexible electronics, soft robots, and energy conversion systems.

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来源期刊

Carbon 工程技术-材料科学：综合

CiteScore

20.80

自引率

7.30%

发文量

审稿时长

23 days

期刊介绍： The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.