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Polyurethane foam-supported three-dimensional interconnected graphene nanosheets network encapsulated in polydimethylsiloxane to achieve significant thermal conductivity enhancement.
- Source :
- Frontiers of Materials Science; Sep2023, Vol. 17 Issue 3, p1-9, 9p
- Publication Year :
- 2023
-
Abstract
- Polyurethane (PU) foams are widely used in thermal management materials due to their good flexibility. However, their low thermal conductivity limits the efficiency. To address this issue, we developed a new method to produce tannic acid (TA)-modified graphene nanosheets (GTs)-encapsulated PU (PU@GT) foams using the soft template microstructure and a facile layer-by-layer (L-B-L) assembly method. The resulting PU@GT scaffolds have ordered and tightly stacked GTs layers that act as three-dimensional (3D) highly interconnected thermal networks. These networks are further infiltrated with polydimethylsiloxane (PDMS). The through-plane thermal conductivity of the polymer composite reaches 1.58 W·m<superscript>−1</superscript>·K<superscript>−1</superscript> at a low filler loading of 7.9 wt.%, which is 1115% higher than that of the polymer matrix. Moreover, the mechanical property of the composite is ∼2 times higher than that of the polymer matrix while preserving good flexibility of the polymer matrix owing to the retention of the PU foam template and the construction of a stable 3D graphene network. This work presents a facile and scalable production approach to fabricate lightweight PU@GT/PDMS polymer composites with excellent thermal and mechanical performance, which implies a promising future in thermal management systems of electronic devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 2095025X
- Volume :
- 17
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Frontiers of Materials Science
- Publication Type :
- Academic Journal
- Accession number :
- 164951739
- Full Text :
- https://doi.org/10.1007/s11706-023-0653-9