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US 9,786,407 B1Granted
Highly conductive graphene-based polymer composite
AssigneeCouncil on Postsecondary Education
InventorsArjit Bose, Indrani Chakraborty
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Abstract
A method was developed to impart a significant enhancement in the electrical conductivity of a graphene/polymer composite by the addition of a non-conducting filler to the insulating polymer that acts as both a toughening agent and dispersion aid.
Claims9
A method of making an electrically conductive composite material, comprising:
- dissolving a polymer in a solvent;
- making a suspension comprising the dissolved polymer and a non-conductive filler dispersing-aid;
- making a suspension comprising individual graphene units;
- mixing the two suspensions together;
- adding an antisolvent for the polymer to the mixed suspension to precipitate a composite material;
- drying the composite material;
- and
- pressing the composite material to remove air and produce a desired shape,
- wherein the non-conductive filler dispersing-aid comprises silica or a core-shell rubber and
- wherein the non-conducting filler dispersing-aid is present in the range of 5-10 volume percent, and the graphene units are present in the range of 1.5-2.5 volume percent.
7 more elements
Dependencies are inferred from the claim text.