▎ 摘　　要

NOVELTY - Preparing inkjet printed graphene ink composition, comprises: exfoliating graphene source with medium comprising organic solvent comprising ethanol, dimethylformamide or ethyl cellulose; contacting portion of exfoliated graphene medium with aqueous medium to concentrate exfoliated graphene and ethyl cellulose in precursor composition comprising graphene and cellulose; and contacting graphene cellulose precursor composition with hydrophobic fluid, to provide graphene ink composition, where inkjet printing the graphene ink composition on substrate and photonic annealing graphene ink composition. USE - The methods are useful for preparing inkjet printed graphene ink composition and preparing graphene ink composite to prepare a graphene ink composite using photonic annealing (claimed). ADVANTAGE - The methods: are rapid, scalable for preparation of highly concentrated graphene media without impractical, time inefficient, excessively long sonication and/or centrifugation procedures; are economical, efficient to the preparation of graphene solution, dispersion and related graphene ink composition, using low cost organic solvents, thus compositions at concentration sufficient, and surface tension and viscosity tunable, for end use applications; provide low temperature, environmentally benign to stable inkjet graphene printing and route to the fabrication of high conductivity patterns suitable for flexible or foldable electronics; maintain print morphology, electrical performance and mechanical properties over repeated substrate bending or folding; utilize the graphene that exhibits superlative electronic properties, which is exploited in applications that require highly conductive, mechanically flexible and solution processable coatings and exhibits robust chemical, environmental stability, reliable printability, and a well defined chemistry without the need for harsh post processing; provides enhanced graphene content of the ink that is used for optimal intense pulsed light annealing which allows rapid post-processing of graphene patterns, compatible with high throughput roll to roll processing on substrates; and provide graphene ink that exhibits both high solids loading (20 mg/ml) and excellent conductivity (25600 plus minus 900 S/m) with the product exceeding the value not only for competing graphene inks but also alternative inkjet printed, and non metal conductors. DETAILED DESCRIPTION - Preparing an inkjet printed graphene ink composition, comprises: exfoliating a graphene source material with a medium comprising an organic solvent comprising ethanol, dimethylformamide or an ethyl cellulose; contacting at least a portion of the exfoliated graphene medium with an aqueous medium to concentrate exfoliated graphene and ethyl cellulose in a precursor composition comprising graphene and the cellulose; and contacting the graphene cellulose precursor composition with a hydrophobic fluid component, to provide a graphene ink composition, where inkjet printing the graphene ink composition on a substrate and photonic annealing the graphene ink composition. INDEPENDENT CLAIMS are also included for: (1) using photonic annealing to prepare a graphene ink composite, comprising exfoliating the graphene source material with the medium, contacting the graphene cellulose precursor composition with the hydrophobic fluid component, where inkjet printing the graphene ink composition on a substrate to provide a graphene substrate composite and photonic annealing the graphene ink composition; (2) a composition comprising graphene, a hydrophobic fluid component and an ethyl cellulose dispersing agent at least partially soluble in the hydrophobic fluid component; and (3) a composite comprising the composition comprising a photonic annealation product of a cellulose stabilized graphene ink coupled to a substrate.