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Aligning graphene nanoplates coplanar in polyvinyl alcohol by using a rotating magnetic field to fabricate thermal interface materials with high through-plane thermal conductivity.
- Source :
-
Composites: Part B, Engineering . Sep2023, Vol. 264, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- With the continuous advancement of electronic devices, there is an urgent need for advanced thermal interface materials (TIMs) to prevent high-power density electronics from overheating. The orderly arrangement of thermally conductive fillers in TIMs plays a crucial role in enhancing thermal conduction along preferred directions. However, it is challenging to control the orientation of the fillers, especially for two-dimensional fillers. In this study, graphene nanoplates (GNPs) were co-planarly arranged in polyvinyl alcohol (PVA) using a rotating magnetic field, which significantly increased the thermal conductivity of the composites. The coplanar vertically aligned GNPs/PVA (CVGNPs/PVA) exhibited a through-plane thermal conductivity of 11.78 W m−1 K−1, which is about 10 times higher than that of the composites with disorderly distributed GNPs (1.14 W m−1 K−1). The rotating magnetic field facilitated the alignment of GNPs and increased face-to-face contact between adjacent GNPs, which significantly boosted the through-plane thermal conductivity of the composite. The compressive modulus of the CVGNPs/PVA composites was only 1.06 MPa, and it helped to reduce the thermal interface resistance to 49 mm2 K W−1. These results offer a novel approach for preparing excellent TIMs that could be used in various applications. GNPs are oriented more compactly and orderly in PVA by using the rotating magnetic field, resulting in a densified thermal conductive paths and higher thermal conductivity of the composite. [Display omitted] [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13598368
- Volume :
- 264
- Database :
- Academic Search Index
- Journal :
- Composites: Part B, Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 170067537
- Full Text :
- https://doi.org/10.1016/j.compositesb.2023.110916