High-resolution patterning of graphene by screen and gravure printing for highly flexible printed electronics
First Claim
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1. A method of preparing a graphene ink composition, said method comprising:
- exfoliating graphene from a graphene source material with a medium comprising an organic solvent and a cellulosic polymer at least partially soluble in said organic solvent;
contacting at least a portion of said exfoliated graphene medium with an aqueous medium to concentrate exfoliated graphene in a composition comprising graphene and a said cellulosic polymer;
contacting said graphene-cellulosic composition with a hydrophobic fluid comprising an ink solvent and a dispersion solvent; and
removing said dispersion solvent from said hydrophobic fluid, to provide a graphene ink composition comprising said ink solvent, said cellulosic polymer, a solids concentration and viscosity.
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Abstract
Graphene ink compositions as can be utilized with gravure and screen printing processes, to provide flexible electronic components with high-resolution printed graphene circuitry.
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Citations
15 Claims
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1. A method of preparing a graphene ink composition, said method comprising:
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exfoliating graphene from a graphene source material with a medium comprising an organic solvent and a cellulosic polymer at least partially soluble in said organic solvent; contacting at least a portion of said exfoliated graphene medium with an aqueous medium to concentrate exfoliated graphene in a composition comprising graphene and a said cellulosic polymer; contacting said graphene-cellulosic composition with a hydrophobic fluid comprising an ink solvent and a dispersion solvent; and removing said dispersion solvent from said hydrophobic fluid, to provide a graphene ink composition comprising said ink solvent, said cellulosic polymer, a solids concentration and viscosity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification