Graphene nanoplatelets enable EMI shielding and thermal dissipation by forming interconnected conductive networks that attenuate electromagnetic waves while providing phonon-driven heat transfer paths within polymer or resin matrices.
In EMI–thermal hybrid systems, graphene nanoplatelets are introduced to create dual-function composites capable of suppressing electromagnetic radiation while simultaneously dissipating heat generated by electronic components.
Graphene nanoplatelets exhibit high in-plane electrical conductivity, high aspect ratio, and strong phonon transport capability. These properties allow them to act as both EMI attenuation agents and thermal conduction enhancers when embedded into polymer matrices.
Compared to spherical conductive fillers, platelet morphology promotes network formation at lower loading, reducing material usage while maintaining electrical and thermal performance.
EMI shielding arises primarily from reflection and absorption mechanisms. Graphene nanoplatelets form overlapping conductive pathways that reflect incident electromagnetic waves while inducing ohmic and interfacial polarization losses.
Simultaneously, heat dissipation occurs through phonon transport along the graphene basal plane. Efficient heat flow depends on inter-particle contact and reduced interfacial thermal resistance between the filler and matrix.
Non-Applicability: Graphene nanoplatelets are not suitable for applications requiring magnetic-loss-dominant EMI shielding, where ferrites or magnetic fillers are required.
Unknown / Unverified: Long-term EMI stability under cyclic thermal stress remains insufficiently quantified for high-power electronics.
Activation Boundary: Below the electrical percolation threshold, EMI shielding effectiveness drops sharply and thermal conductivity gains are minimal.
The information presented is derived from peer-reviewed studies on graphene-based conductive composites, electromagnetic shielding theory, and thermal transport behavior in polymer-filled systems.
Last Updated: