Construction of Vertically Interconnected Microdiamond Channels Inspired by Subcutis for Thermal Conductivity Enhancement of Polymer Composite Films

IF 3.8 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2024-10-21 DOI:10.1021/acs.iecr.4c02718

Mingqi Sun, Sai Zhang, Jing Fang, Xinru Li, WenXin Cao, XinZe Mao, Farao Zhang, Jiecai Han, Jiaqi Zhu

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Abstract

Polymeric composites with enhanced thermal conductivity are essential components for thermal management. Inspired by the stacked structure of adipose cells in the subcutis, we propose a strategy to construct a spatially interconnected thermal channel of microdiamonds (MDs) along vertical directions. In detail, a thermoplastic polyurethane (TPU)@MD core–shell structure was assembled via a microcladding method, which is utilized as reinforcement to fabricate the TPU@MD/poly(vinyl alcohol) (PVA) composite films through a doctor-blade coating technique. The resultant composite films exhibit a high through-plane thermal conductivity of 3.31 W/mK at a MD loading of 39 vol %, which is 195% higher than randomly dispersed composites. A two-step mathematical model was derived by the thermal resistance method to simultaneously analyze the mechanism of thermal conductivity enhancement. Meanwhile, the TPU@MD/PVA composites also reveal low dielectric loss. It is believed that this strategy to design and fabricate thermal interface materials with excellent properties provides effective guidance in thermal management applications.

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受皮下组织启发构建垂直互联微金刚石通道，用于增强聚合物复合薄膜的导热性能

具有增强导热性能的聚合物复合材料是热管理的重要组成部分。受皮下脂肪细胞堆叠结构的启发，我们提出了一种沿垂直方向构建空间互连的微金刚石（MD）导热通道的策略。具体来说，我们通过微包层方法组装了热塑性聚氨酯（TPU）@MD 核壳结构，并利用该结构作为增强材料，通过刮刀涂层技术制造出 TPU@MD/ 聚乙烯醇（PVA）复合薄膜。在 MD 含量为 39 Vol % 时，所制备的复合薄膜具有 3.31 W/mK 的高通面热导率，比随机分散的复合材料高出 195%。通过热阻法得出了一个两步数学模型，同时分析了热导率提高的机理。同时，TPU@MD/PVA 复合材料的介电损耗也很低。相信这种设计和制造具有优异性能的热界面材料的策略将为热管理应用提供有效的指导。

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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来源期刊

Industrial & Engineering Chemistry Research 工程技术-工程：化工

CiteScore

7.40

自引率

7.10%

发文量

1467

审稿时长

2.8 months

期刊介绍： ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.