Lee Jooyoung, Yang Wonyoung, Lee Geunhyeong, Cho Youngsung, Kim Jooheon
School of Chemical Engineering and Materials Science, Chung-Ang University, Seoul 06974, Republic of Korea.
Department of Advanced Materials Engineering, Chung-Ang University, Anseong 17546, Republic of Korea.
Nanomaterials (Basel). 2023 Jul 25;13(15):2154. doi: 10.3390/nano13152154.
The configuration of a continuous and oriented thermal pathway is essential for efficient heat dissipation in the oriented direction. Three-dimensional (3D) conductive filler structures provide a suitable approach for constructing continuous thermal pathways in polymer-based composites. The aluminum nitride/reduced graphene oxide/poly(dimethylsiloxane) (AlN/rGO/PDMS) composite material is made with a 3D foam structure and focuses on reducing GO and forming foam via polyvinyl alcohol (PVA). We analyze the successful fabrication of hybrid fillers and composites using various methods. The fabricated composite with a 3D network filler foam achieves a through-plane thermal conductivity of 1.43 W/mK and achieves 752% higher thermal conductivity compared to pure PDMS, which is superior to composites without 3D foam. The continuous 3D filler structure via freeze-drying and annealing processes provides efficient thermal dissipation in the through-plane direction pathway, which is critical for enhancing thermal conductivity. Therefore, this work produces a polymer composite material with improved thermal conductivity through various processes.
连续且定向的热传导路径的构型对于在定向方向上高效散热至关重要。三维（3D）导电填料结构为在聚合物基复合材料中构建连续热传导路径提供了一种合适的方法。氮化铝/还原氧化石墨烯/聚二甲基硅氧烷（AlN/rGO/PDMS）复合材料具有三维泡沫结构，并且着重于通过聚乙烯醇（PVA）还原氧化石墨烯并形成泡沫。我们分析了使用各种方法成功制备混合填料和复合材料的过程。所制备的具有三维网络填料泡沫的复合材料实现了1.43W/mK的面内热导率，与纯PDMS相比，热导率提高了752%，优于没有三维泡沫的复合材料。通过冷冻干燥和退火工艺形成的连续三维填料结构在面内方向路径上提供了高效的热耗散，这对于提高热导率至关重要。因此，这项工作通过各种工艺制备出了具有改善热导率的聚合物复合材料。
