Graphitized-rGO/Polyimide Aerogel as the Compressible Thermal Interface Material with Both High In-Plane and Through-Plane Thermal Conductivities
| العنوان: | Graphitized-rGO/Polyimide Aerogel as the Compressible Thermal Interface Material with Both High In-Plane and Through-Plane Thermal Conductivities |
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| المؤلفون: | Haiquan Cheng, Wei Wei, Chenglong Ji, Peng Lv |
| المصدر: | Materials, Vol 14, Iss 2350, p 2350 (2021) Materials Volume 14 Issue 9 |
| بيانات النشر: | MDPI AG, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Technology, Materials science, Thermal grease, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, reduced graphene oxide, polyimide, Article, law.invention, Thermal conductivity, law, General Materials Science, thermal conductivity, Composite material, Porosity, Microscopy, QC120-168.85, Phonon scattering, Graphene, thermal interface materials, QH201-278.5, Aerogel, 021001 nanoscience & nanotechnology, Engineering (General). Civil engineering (General), 0104 chemical sciences, TK1-9971, Descriptive and experimental mechanics, compressibility, Grain boundary, Electrical engineering. Electronics. Nuclear engineering, TA1-2040, 0210 nano-technology, Polyimide |
| الوصف: | Reduced graphene oxide (rGO) aerogels with a three-dimensional (3D) interconnected network provides continuous heat transport paths in multi-directions. However, the high porosity of rGO aerogels commonly leads to very low thermal conductivity (TC), and defects and grain boundaries of rGO sheets result in a high extent of phonon scattering, which is far from satisfying the requirement of thermal interface materials (TIMs). Here, a compressible graphitized-rGO/polyimide (g-rGO/PI) aerogel was prepared by the ice-template method and “molecular welding” strategy. The regular cellular structure and closely packed cell walls bring the g-rGO/PI aerogel high compressibility, which made the aerogel can maintain the continuous thermal transport paths well even in highly compacted status. The rGO sheets in the cell wall surface are welded up by g-PI during imidization and graphitization treatment, providing efficient channels for phonon transportation in the 3D network. The g-rGO/PI aerogel in a compressive strain of 95% has a high TC in the plane of 172.5 W m−1k−1 and a high TC through the plane of 58.1 W m−1k−1, which is superior to other carbon-based TIMs previously reported. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 1996-1944 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67febee7a2b05d7237d6107ac37a1e3a https://www.mdpi.com/1996-1944/14/9/2350 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....67febee7a2b05d7237d6107ac37a1e3a |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19961944 |
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