Vertically Aligned Carbon Fiber/Aluminum Particle/Silicone Rubber Composites with High Thermal Conduction and Desired Mechanical Performance,Industrial & Engineering Chemistry Research

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Vertically Aligned Carbon Fiber/Aluminum Particle/Silicone Rubber Composites with High Thermal Conduction and Desired Mechanical Performance
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-09-13 , DOI: 10.1021/acs.iecr.4c02171
Xinxin Li ₁ , Zuomin Lei ₂ , Zhenxing Chen ₁

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To utilize the highly thermally conductive axial direction of 1-dimensional carbon fibers (CFs), numerous endeavors have been devoted to the orientation engineering of CF-filled thermally conductive composites. However, the construction of thermal transfer pathways between the aligned CFs is often neglected, which inevitable leads to great thermal resistances that affect the thermal conductivity (TC) of prepared composites. Here, we proposed a facile and scalable strategy to drastically increase the through-plane TC of vertically aligned CF/silicone rubber (V-CF/SR) composites by embedding aluminum (Al) particles into the channels between the aligned CFs during the infiltration process. The V-CF/SR composites embedded with Al particles (V-CF/Al/SR) were fabricated via electrostatic flocking of CFs followed by the infiltration of the Al/SR slurry and curing. Thanks to the vertically aligned CFs bridged by Al particles to form synergistic thermal transfer pathways, the prepared V-CF/Al/SR composites achieved a high through-plane TC of 12.32 W/m K at a low CF content of 19.42 wt % and Al loading of 52.36 wt %, which is 102.5 times higher than that of pure SR. Besides, the V-CF/Al/SR composites maintained desired flexibility, elasticity, and mechanical hardness. Considering that an excellent thermal transfer ability and good mechanical properties have been obtained, the V-CF/Al/SR composites show huge potential in advanced thermal management.

中文翻译：

具有高导热性和所需机械性能的垂直排列碳纤维/铝颗粒/硅橡胶复合材料

为了利用一维碳纤维（CF）的高导热轴向，人们在CF填充导热复合材料的取向工程方面做出了许多努力。然而，对齐CF之间的热传递路径的构建经常被忽视，这不可避免地导致巨大的热阻，从而影响所制备的复合材料的导热率（TC）。在这里，我们提出了一种简便且可扩展的策略，通过在渗透过程中将铝 (Al) 颗粒嵌入到排列的 CF 之间的通道中，大幅提高垂直排列的 CF/硅橡胶 (V-CF/SR) 复合材料的贯穿平面 TC 。嵌入Al颗粒的V-CF/SR复合材料（V-CF/Al/SR）是通过静电植绒CF，然后渗透Al/SR浆料并固化而制备的。由于由 Al 颗粒桥接的垂直排列的 CF 形成协同热传递路径，所制备的 V-CF/Al/SR 复合材料在 19.42 wt% 的低 CF 含量下实现了 12.32 W/m K 的高穿过平面 TC， Al负载量为52.36 wt%，是纯SR的102.5倍。此外，V-CF/Al/SR 复合材料保持了所需的柔韧性、弹性和机械硬度。考虑到优异的热传递能力和良好的机械性能，V-CF/Al/SR复合材料在先进热管理方面显示出巨大的潜力。

更新日期：2024-09-13

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