Fabrication of Graphite/Hydroxyethyl Cellulose (HEC)/Silicone Gel Composites with Aligned Structure for Electromagnetic Interference Shielding and Thermal Management

Jianda Wang1; Zhijie Zhao1; Zhen Zhang2; Zhiqiang Lin3; Yougen Hu3

10.1109/ICEPT56209.2022.9873396

2022

978-1-6654-9906-4

2022 23rd International Conference on Electronic Packaging Technology (ICEPT)

1-6

10-13 Aug. 2022

Dalian, China

Nowadays, materials with both excellent thermal management properties and electromagnetic interference (EMI) shielding properties have more and more practical application scenarios and are gaining widespread attention. Herein, the composite with both excellent EMI shielding properties and high thermal management properties was successfully prepared by mixing graphite flakes with hydroxyethyl cellulose solution using a convenient and effective freeze-casting method, freeze-drying and then the liquid silicone gel was casted into the aligned Graphite/hydroxyethyl cellulose (HEC) skeleton with vacuum assisted permeation method. The composites with a loading of 18.2 vol% graphite have a high thermal conductivity of 2.66 W m-1 k-1 in the vertical direction In addition, its EMI shielding effectiveness (SE) is up to 48 dB in the horizontal direction and 25 dB in the vertical direction in the frequency band range of 8.2-12.4 GHz. Such composite is a promising and potential material for thermal management and electromagnetic shielding due to its excellent properties.

EMI shielding Thermal management Freeze-casting

其他

IEEE

1.Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, China
2.Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences College of Engineering, Southern University of Science and Technology, Shenzhen, China
3.Chinese Academy of Sciences, Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Shenzhen, China

Jianda Wang,Zhijie Zhao,Zhen Zhang,et al. Fabrication of Graphite/Hydroxyethyl Cellulose (HEC)/Silicone Gel Composites with Aligned Structure for Electromagnetic Interference Shielding and Thermal Management[C],2022:1-6.