双面聚酰胺薄膜的高透厚导热性。

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-05-19 DOI:10.1021/acs.nanolett.5c01036

Xiuqiang Li,Guangxin Lv,Yinglong Hu,Yu-Hsuan Tsao,Renjiu Hu,Zhiting Tian,Kejun Liu,Hao Ma

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引用次数: 0

摘要

高导热性对于电子芯片封装等聚合物应用至关重要，在这些应用中，高效的散热确保了系统的功能和可靠性。在这里，我们介绍了一种新的策略来提高二维共价有机框架（COFs）的通平面导热性。一种高度结晶的二维聚酰胺（v2DPA）薄膜在310 K时的导热系数为1.16±0.05 W/(mK)，超过了COF-5之前的记录（1.03 W/(mK)） [Evans等人]。分子动力学预测（1.11±0.07 W/(mK)）该值几乎是体PA（0.34±0.03 W/(mK)）的3倍。声子色散计算将这种增强归因于强共价键，增加声子寿命和群速度。我们的研究结果强调了定向二维聚合物和分层堆叠的二维COF薄膜在边缘配置中的有效性，以提高通过厚度的导热性，为其集成到电子热管理应用中提供了一条有希望的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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High Through-Thickness Thermal Conductivity in an Edge-On Two-Dimensional Polyamide Thin Film.

High thermal conductivity is essential for polymer applications such as electronic chip encapsulation, where efficient heat dissipation ensures system functionality and reliability. Here, we introduce a novel strategy to enhance through-plane thermal conductivity in 2D covalent organic frameworks (COFs). A highly crystalline edge-on 2D polyamide (v2DPA) film achieves a thermal conductivity of 1.16 ± 0.05 W/(mK) at 310 K, surpassing the previous record (1.03 W/(mK) in COF-5 [Evans et al. Nat. Mater. 2021, 20, 1142]) and aligning with molecular dynamics predictions (1.11 ± 0.07 W/(mK)). This value is nearly three times higher than that of bulk PA (0.34 ± 0.03 W/(mK)). Phonon dispersion calculations attribute this enhancement to strong covalent bonding, increasing phonon lifetimes, and group velocities. Our findings highlight the effectiveness of orienting 2D polymer and layer-stacked 2D COF films in an edge-on configuration to improve through-thickness thermal conductivity, offering a promising pathway for their integration into electronic thermal management applications.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.