Abstract
Recently, biomimetic brick and mortar composites (B/M) are gathering great attention due to their outstanding properties. The use of graphene as bricks is expected to achieve good mechanical performances combined with remarkable thermal diffusivity making them optimal candidates for heat spread applications. Macroscopic composites (1 mm thick) have been manufactured at different filler content (up to 100% vol%) and their morphology have been investigated by scanning electron microscopy. Bending test have been carried out on samples for measuring the effect of the polymer amount on the composite. The thermal diffusivity has been investigated, both in plane and cross plane, by light flash analysis (LFA). Coupons showed a well aligned inner structure at each resin content, however the effective performances depends on the capability of stress transfer.
Highlights
Freestanding paper-like materials base on nanoscale lamellar fillers have attracted extensive interest thank to their intrinsic properties
Macroscopic composites (1 mm thick) have been manufactured at different filler content and their morphology have been investigated by scanning electron microscopy
We further investigate the effect of the matrix content on thermal diffusivity of films and flexural elastic modulus of the nanolaminates
Summary
Freestanding paper-like materials base on nanoscale lamellar fillers have attracted extensive interest thank to their intrinsic properties. Such class of materials borrows specific properties from the two dimensional (2D) nano-filler together with special features related to the material architecture[1]–[3]. Wu and Dzral [8] fabricated a self-standing graphite paper consisting of graphite nanoplatelets (GNPs) with controlled porosity. Both thermoset and thermoplastic matrices were used to impregnate the porous GNP neat paper and an interesting tensile modulus (22 GPa) was attained by the nanolaminate at a minimum content of 20% of the polymer matrix. The results revealed that these class of composites are promising candidates for heat spread applications since they combine good mechanical performances and remarkable thermal diffusivity
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