A series of novel polymer composites consisting of graphene foam (GF), carbon black (CB) and polydimethylsiloxane
(PDMS) were designed and fabricated. Their microstructures and thermal properties
were studied. An excellent dispersion of CB was achieved not only in the space of interconnected GF, but
also in the interior of GF arms. Bi-network of thermal transfer path in the composites was made up by GF
and CB when CB content reached 8 wt%. The synergic effect of GF and CB on thermal properties was well
proved by the good performance of CB and GF co-filled composite. The 8 wt% CB/GF/PDMS composite has
much better properties, namely, 222% and 72% higher in thermal conductivity, 40% and 10% higher in
storage modulus and much lower weight loss compared to pure PDMS and GF/PDMS composite,
respectively. Besides, the long term stability at 100 C of thermal conductivity proves the applicability of
the novel composite. These results signify a promising application as thermal interface materials (TIMs)
of the CB/GF/PDMS composite.
A series of novel polymer composites consisting of graphene foam (GF), carbon black (CB) and polydimethylsiloxane(PDMS) were designed and fabricated. Their microstructures and thermal propertieswere studied. An excellent dispersion of CB was achieved not only in the space of interconnected GF, butalso in the interior of GF arms. Bi-network of thermal transfer path in the composites was made up by GFand CB when CB content reached 8 wt%. The synergic effect of GF and CB on thermal properties was wellproved by the good performance of CB and GF co-filled composite. The 8 wt% CB/GF/PDMS composite hasmuch better properties, namely, 222% and 72% higher in thermal conductivity, 40% and 10% higher instorage modulus and much lower weight loss compared to pure PDMS and GF/PDMS composite,respectively. Besides, the long term stability at 100 C of thermal conductivity proves the applicability ofthe novel composite. These results signify a promising application as thermal interface materials (TIMs)of the CB/GF/PDMS composite.
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