Liao Jiaqiang, Chen Shijie, Huang Minjin, Rui Tao, Tian Zhi Qun, Li Changzheng
School of Mechanical Engineering, Guangxi University, Nanning, Guangxi 530004, China.
Guangxi Key Laboratory of Electrochemical Energy Materials, Collaborative Innovation Center of Sustainable Energy Materials, Nanning, Guangxi 530004, China.
Phys Chem Chem Phys. 2024 Oct 9;26(39):25655-25663. doi: 10.1039/d4cp02674h.
The escalating demands for miniaturization, integration, and portability in electronic devices have underscored the criticality of efficient heat dissipation. The utilization of high-performance thermal interface materials (TIMs) to fill the gaps between contacting surfaces holds significant potential for enhancing heat transfer efficiency. Herein, we successfully enhance the thermal properties of the epoxy composite TIM by integrating grown vertically aligned graphene on the metal surface using radio frequency plasma-enhanced chemical vapor deposition (RF-PECVD). To investigate the effect of vertical graphene on epoxy, the sandwich structure of copper/vertical graphene-epoxy/copper (Cu/VG-EP/Cu) is fabricated by incorporating epoxy resin. The experimental results demonstrate that the thermal conductivity of VG-EP reaches 2.06 W m K and achieves an impressive 1215% maximum enhancement. Furthermore, the numerical simulation findings show that vertical graphene consistent with the temperature gradient exhibits the highest heat transfer efficiency. This work presents an in-depth study of vertically aligned graphene within the epoxy resin, highlighting the advantages of vertically aligned fillers and offering novel perspectives for the advancement of TIMs.
电子设备对小型化、集成化和便携性的需求不断升级，凸显了高效散热的重要性。利用高性能热界面材料（TIMs）填充接触表面之间的间隙，对于提高传热效率具有巨大潜力。在此，我们通过射频等离子体增强化学气相沉积（RF-PECVD）在金属表面集成垂直生长的石墨烯，成功提高了环氧复合TIM的热性能。为了研究垂直石墨烯对环氧树脂的影响，通过加入环氧树脂制备了铜/垂直石墨烯-环氧树脂/铜（Cu/VG-EP/Cu）三明治结构。实验结果表明，VG-EP的热导率达到2.06 W m K，最大增强率达到了令人印象深刻的1215%。此外，数值模拟结果表明，与温度梯度一致的垂直石墨烯表现出最高的传热效率。这项工作对环氧树脂中的垂直排列石墨烯进行了深入研究，突出了垂直排列填料的优势，并为TIMs的发展提供了新的视角。
