Journal
2D MATERIALS
Volume 4, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2053-1583/aa7cd1
Keywords
epoxy resin; composites; thermal conductivity; graphene; 2D graphitic materials
Categories
Funding
- Haydale Composites Solutions Ltd
- EPSRC [EP/P510191/1]
- InnovateUK
- Engineering and Physical Sciences Research Council [EP/P510191/1] Funding Source: researchfish
- EPSRC [EP/P510191/1] Funding Source: UKRI
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The outstanding thermal conductivity (lambda) of graphene and its derivatives offers a potential route to enhance the thermal conductivity of epoxy resins. Key challenges still need to be overcome to ensure effective dispersion and distribution of 2D graphitic fillers throughout the epoxy matrix. 2D filler type, morphology, surface chemistry and dimensions are all important factors in determining filler thermal conductivity and de facto the thermal conductivity of the composite material. To achieve significant enhancement in the thermal conductivity of epoxy composites, different strategies are required to minimise phonon scattering at the interface between the nano-filler and epoxy matrix, including chemical functionalisation of the filler surfaces such that interactions between filler and matrix are promoted and interfacial thermal resistance (ITR) reduced. The combination of graphitic fillers with dimensions on different length scales can potentially form an interconnected multi-dimensional filler network and, thus contribute to enhanced thermal conduction. In this review, we describe the relevant properties of different 2D nano-structured graphitic materials and the factors which determine the translation of the intrinsic thermal conductivity of these 2D materials to epoxy resins. The key challenges and perspectives with regard achieving epoxy composites with significantly enhanced thermal conductivity on addition of 2D graphitic materials are presented.
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