One or more techniques are disclosed for a method for functionalized a graphitic material comprising the steps of: 1) providing a graphitic material; 2) providing a first molecule comprising a first group, a spacer, and a second group; 3) providing a second molecule comprising a third group, a spacer, and a fourth group, wherein the third group is a different group from the first group; and 4) bonding the first molecule and the second molecule to the graphitic material. Also disclosed is a tunable material composition comprising the functionalized carbon nanotubes or functionalized graphene prepared by the methods described herein.

A method for preparing a preblend of nanostructured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nanostructured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-walled nanotubes in ethylene--olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.

A method for preparing a preblend of nanostructured carbon, such as nanotubes, fullerenes, or graphene, and a particulate solid, such as polymer beads, carbon black, graphitic particles or glassy carbon involving wet-mixing and followed by optional drying to remove the liquid medium. The preblend may be in the form of a core-shell powder material with the nanostructured carbon as the shell on the particulate solid core. The preblend may provide particularly improved dispersion of single-walled nanotubes in ethylene--olefin elastomer compositions, resulting in improved reinforcement from the nanotubes. The improved elastomer compositions may show simultaneous improvement in both modulus and in elongation at break. The elastomer compositions may be formed into useful rubber articles.

There is provided a carbon material dispersion which has excellent dispersibility and in which the dispersibility is retained stably over a long period of time even when the carbon material dispersion contains a carbon material at a high concentration. The carbon material dispersion is a carbon material dispersion containing a carbon material, water, and a polymeric dispersant, wherein the polymeric dispersant is a polymer including 5 to 40% by mass of a constituent unit (1) derived from a monomer 1, such as 2-vinylpyridine, 50 to 80% by mass of a constituent unit (2) derived from a monomer 2 represented by formula (1) (wherein R.sub.1 represents a hydrogen atom or the like, A represents O or NH, X represents an ethylene group or a propylene group, Y represents O, NHCOO, or NHCONH, each of R.sub.2 represents a hydrogen atom or the like, n represents 20 to 100, and R.sub.3 represents a hydrogen atom or the like), and 0.5 to 40% by mass of a constituent unit (3) derived from a monomer 3 copolymerizable with above-described monomers.

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A process for exfoliating untreated 3-dimensional material to produce a 2-dimensional material, said process comprising the steps of mixing the untreated 3-dimensional material in a liquid to provide a mixture; applying shear force to said mixture to exfoliate the 3-dimensional material and produce dispersed exfoliated 2-dimensional material in solution; and removing the shear force applied to said mixture, such that the dispersed exfoliated 2-dimensional material remains free and unaggregated in solution.

A process for exfoliating untreated 3-dimensional material to produce a 2-dimensional material, said process comprising the steps of mixing the untreated 3-dimensional material in a liquid to provide a mixture; applying shear force to said mixture to exfoliate the 3-dimensional material and produce dispersed exfoliated 2-dimensional material in solution; and removing the shear force applied to said mixture, such that the dispersed exfoliated 2-dimensional material remains free and unaggregated in solution.

A printed wiring board includes a first layer comprising a first plurality of conductive graphene traces and insulating graphane arranged to separate the first plurality of conductive graphene traces. The printed wiring board also includes a second layer and a third layer. The second layer includes an insulating layer. The third layer includes a second plurality of conductive graphene traces and insulating graphane arranged to separate the second plurality of conductive graphene traces. The second layer is disposed between the first layer and the third layer.

A printed wiring board includes a first layer comprising a first plurality of conductive graphene traces and insulating graphane arranged to separate the first plurality of conductive graphene traces. The printed wiring board also includes a second layer and a third layer. The second layer includes an insulating layer. The third layer includes a second plurality of conductive graphene traces and insulating graphane arranged to separate the second plurality of conductive graphene traces. The second layer is disposed between the first layer and the third layer.

Printed electronic device comprising a substrate onto at least one surface of which has been applied a layer of an electrically conductive ink comprising functionalized graphene sheets and at least one binder. A method of preparing printed electronic devices is further disclosed.

Printed electronic device comprising a substrate onto at least one surface of which has been applied a layer of an electrically conductive ink comprising functionalized graphene sheets and at least one binder. A method of preparing printed electronic devices is further disclosed.