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Author Topic: Thermally Conductive Graphene Composites


KeithBlake-
ly
Newbie
Posts: 2
Thermally Conductive Graphene Composites
on: August 11, 2013, 16:17

I am interested in hearing about the work that companies are doing in the area of thermally conductive graphene filled composites - particularly polymer matrix composites. With theoretical thermal conductivity in the 3,000 - 5,000 W/mK range, and percolation effects being observed, at least for electrical conduction, at as low as 0.5% by volume, the potential to dramatically improve the thermal conductance of plastics to compete with metals exists. The question is whether companies and/or research groups have figured out how to incorporate graphene into plastics and see significant increases in the base thermal conductivity.



gtracker
Moderator
Posts: 4
Re: Thermally Conductive Graphene Composites
on: August 12, 2013, 08:12

Back in October I caught this patent:
http://www.graphenetracker.com/polimeri-europa-patents-thermal-insulation-with-graphene/
The original patent can be read here:
http://www.freepatentsonline.com/y2012/0264836.html

Somehow, they find that the addition of graphene actually increases thermal insulation. They're also surprised, but I don't think there is a physical explanation in the patent (if you find it, let me know). The patent contains a good review of methods of production of graphene oxide, as well as the detailed process of embedding into a polymer matrix.



KeithBlake-
ly
Newbie
Posts: 2
Re: Thermally Conductive Graphene Composites
on: August 13, 2013, 17:52

Well that is going to be a disappointment to a lot of folks! Thanks for pointing that out. My guess is that the rule of mixtures will ultimately lead to systems where the thermal conductivity of graphene has a POSITIVE effect on the composite but based on this information, it may be a lot harder than just adding graphene and mixing!

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