Thermal conductivity measurement of an individual millimeter-long expanded graphite ribbon using a variable-length T-type method

Expanded graphite (EG) is a well-known carbon derivative and widely used as the thermally conductive enhancer for thermal management composites. However, investigation on conductivity measurement of an individual EG particle still unexploited, which prevents exploration coupling mechanism between matrices further measures enhancement. Herein, using variable-length T-type method, we measure expanded ribbon (EGR) obtained by mechanically compressing separate particle. The EGR has micrometer-sized thickness millimeter-sized length. By changing sample length while maintaining contact junction, simultaneously resistance probe. longitudinal reaches up to 335.6±27.4 W m−1 K−1 at room temperature decreases 254.8±20.8 rises from 300 K 380 K. With higher than most graphene paper products some fibers, this low-cost nanocarbon-based material exhibits great advantage in development composites, presented accurate provides indispensable data rational design