Patent
US 9,845,244METHOD OF FORMING GRAPHENE MATERIAL BY GRAPHITE EXFOLIATION
OLEG KOZYUK
US
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Patent
Atlas literature
Patent
US 9,845,244Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a block diagram depicting an example metho d of prod uci ng a graphene material from starting grap hiti c material pa rti cle s; and
FIG. 2 is a schematic longitudinal section view of a portion of a throttle device. DE TAIL ED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION As used …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of producing a graphene material from graphitic material particles, the method comprising the steps of: (a) mixing the graphitic material particles in a liquid medium to form a graphite suspension; and (b) exposing said graphite suspension to a compression and explosive decompression treatment, the treatment comprising compressing the graphite suspension to a first pressure, directing the compressed graphite suspension at least once through a local constriction into an area of reduced pressure whereby the graphite suspension is decompressed from the first pressure to a second pressure, thereby expanding the graphitic material particles and exfoliating graphene material from the graphitic material particles to produce graphene material dispersed in said liquid medium. wherein the graphite suspension is decompressed from the first pressure to the second pressure in less than 2 x 10-6 second and wherein the pressure in the area of reduced pressure is maintained above the saturated vapor pressure of the liquid medium sufficient to prevent formation of cavitation bubbles. Currently amended
The method of claim 1, wherein the first pressure is at least 1000 PSI. Original
The method of claim 1, wherein the second pressure is less than 20 % of the first pressure. Original
The method of claim 1, wherein the graphene material produced by the method is graphene sheets, graphene plates or a mixture thereof. Original
The method of claim 1, wherein the graphite suspension passes through one or more orifices, nozzles or apertures in the local constriction. Original
The method of claim 1, wherein said liquid medium comprises water, organic solvent, alcohol, acid, a monomer, an oligomer, a resin, or a combination thereof. Original
The method of claim 1, wherein said liquid medium comprises a surfactant. Original
The method of claim 1, wherein said graphitic material particles comprise natural graphite, synthetic graphite, highly oriented pyrolytic graphite, meso-carbon micro-bead, coke, graphitized meso-phase carbon, graphitized soft carbon, carbon or graphite fiber or whisker, carbon or graphitic nano-fiber, exfoliated graphite, expanded graphite, or a combination thereof. Original
The method of claim 1, wherein said liquid medium comprises a monomer or a polymer dissolved or dispersed therein to form a nanocomposite precursor suspension. Original
The method of claim 1, wherein the graphite suspension is exposed to the compression and explosive decompression treatment at least 20 times. Original
The method of claim 1, wherein the graphite suspension is compressed by use of a pressure intensifier or a pump. Original
The method of claim 1, wherein the second pressure is less than 10 % of the first pressure. Original
The method of claim 1, wherein the first pressure is at least 10,000 PSI. Original
Canceled. Canceled
Canceled. Canceled
Materials described outside the worked examples.
graphene material
graphitic material particles
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 0.000001 second | — |
Pressure |
Patent
Atlas literature
Patent
US 9,845,244Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a block diagram depicting an example metho d of prod uci ng a graphene material from starting grap hiti c material pa rti cle s; and
FIG. 2 is a schematic longitudinal section view of a portion of a throttle device. DE TAIL ED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION As used …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of producing a graphene material from graphitic material particles, the method comprising the steps of: (a) mixing the graphitic material particles in a liquid medium to form a graphite suspension; and (b) exposing said graphite suspension to a compression and explosive decompression treatment, the treatment comprising compressing the graphite suspension to a first pressure, directing the compressed graphite suspension at least once through a local constriction into an area of reduced pressure whereby the graphite suspension is decompressed from the first pressure to a second pressure, thereby expanding the graphitic material particles and exfoliating graphene material from the graphitic material particles to produce graphene material dispersed in said liquid medium. wherein the graphite suspension is decompressed from the first pressure to the second pressure in less than 2 x 10-6 second and wherein the pressure in the area of reduced pressure is maintained above the saturated vapor pressure of the liquid medium sufficient to prevent formation of cavitation bubbles. Currently amended
The method of claim 1, wherein the first pressure is at least 1000 PSI. Original
The method of claim 1, wherein the second pressure is less than 20 % of the first pressure. Original
The method of claim 1, wherein the graphene material produced by the method is graphene sheets, graphene plates or a mixture thereof. Original
The method of claim 1, wherein the graphite suspension passes through one or more orifices, nozzles or apertures in the local constriction. Original
The method of claim 1, wherein said liquid medium comprises water, organic solvent, alcohol, acid, a monomer, an oligomer, a resin, or a combination thereof. Original
The method of claim 1, wherein said liquid medium comprises a surfactant. Original
The method of claim 1, wherein said graphitic material particles comprise natural graphite, synthetic graphite, highly oriented pyrolytic graphite, meso-carbon micro-bead, coke, graphitized meso-phase carbon, graphitized soft carbon, carbon or graphite fiber or whisker, carbon or graphitic nano-fiber, exfoliated graphite, expanded graphite, or a combination thereof. Original
The method of claim 1, wherein said liquid medium comprises a monomer or a polymer dissolved or dispersed therein to form a nanocomposite precursor suspension. Original
The method of claim 1, wherein the graphite suspension is exposed to the compression and explosive decompression treatment at least 20 times. Original
The method of claim 1, wherein the graphite suspension is compressed by use of a pressure intensifier or a pump. Original
The method of claim 1, wherein the second pressure is less than 10 % of the first pressure. Original
The method of claim 1, wherein the first pressure is at least 10,000 PSI. Original
Canceled. Canceled
Canceled. Canceled
Materials described outside the worked examples.
graphene material
graphitic material particles
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 0.000001 second | — |
Pressure |
Patent
Atlas literature
Patent
US 9,845,244Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a block diagram depicting an example metho d of prod uci ng a graphene material from starting grap hiti c material pa rti cle s; and
FIG. 2 is a schematic longitudinal section view of a portion of a throttle device. DE TAIL ED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION As used …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of producing a graphene material from graphitic material particles, the method comprising the steps of: (a) mixing the graphitic material particles in a liquid medium to form a graphite suspension; and (b) exposing said graphite suspension to a compression and explosive decompression treatment, the treatment comprising compressing the graphite suspension to a first pressure, directing the compressed graphite suspension at least once through a local constriction into an area of reduced pressure whereby the graphite suspension is decompressed from the first pressure to a second pressure, thereby expanding the graphitic material particles and exfoliating graphene material from the graphitic material particles to produce graphene material dispersed in said liquid medium. wherein the graphite suspension is decompressed from the first pressure to the second pressure in less than 2 x 10-6 second and wherein the pressure in the area of reduced pressure is maintained above the saturated vapor pressure of the liquid medium sufficient to prevent formation of cavitation bubbles. Currently amended
The method of claim 1, wherein the first pressure is at least 1000 PSI. Original
The method of claim 1, wherein the second pressure is less than 20 % of the first pressure. Original
The method of claim 1, wherein the graphene material produced by the method is graphene sheets, graphene plates or a mixture thereof. Original
The method of claim 1, wherein the graphite suspension passes through one or more orifices, nozzles or apertures in the local constriction. Original
The method of claim 1, wherein said liquid medium comprises water, organic solvent, alcohol, acid, a monomer, an oligomer, a resin, or a combination thereof. Original
The method of claim 1, wherein said liquid medium comprises a surfactant. Original
The method of claim 1, wherein said graphitic material particles comprise natural graphite, synthetic graphite, highly oriented pyrolytic graphite, meso-carbon micro-bead, coke, graphitized meso-phase carbon, graphitized soft carbon, carbon or graphite fiber or whisker, carbon or graphitic nano-fiber, exfoliated graphite, expanded graphite, or a combination thereof. Original
The method of claim 1, wherein said liquid medium comprises a monomer or a polymer dissolved or dispersed therein to form a nanocomposite precursor suspension. Original
The method of claim 1, wherein the graphite suspension is exposed to the compression and explosive decompression treatment at least 20 times. Original
The method of claim 1, wherein the graphite suspension is compressed by use of a pressure intensifier or a pump. Original
The method of claim 1, wherein the second pressure is less than 10 % of the first pressure. Original
The method of claim 1, wherein the first pressure is at least 10,000 PSI. Original
Canceled. Canceled
Canceled. Canceled
Materials described outside the worked examples.
graphene material
graphitic material particles
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 0.000001 second | — |
Pressure |
Patent
Atlas literature
Patent
US 9,845,244Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is a block diagram depicting an example metho d of prod uci ng a graphene material from starting grap hiti c material pa rti cle s; and
FIG. 2 is a schematic longitudinal section view of a portion of a throttle device. DE TAIL ED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE INVENTION As used …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method of producing a graphene material from graphitic material particles, the method comprising the steps of: (a) mixing the graphitic material particles in a liquid medium to form a graphite suspension; and (b) exposing said graphite suspension to a compression and explosive decompression treatment, the treatment comprising compressing the graphite suspension to a first pressure, directing the compressed graphite suspension at least once through a local constriction into an area of reduced pressure whereby the graphite suspension is decompressed from the first pressure to a second pressure, thereby expanding the graphitic material particles and exfoliating graphene material from the graphitic material particles to produce graphene material dispersed in said liquid medium. wherein the graphite suspension is decompressed from the first pressure to the second pressure in less than 2 x 10-6 second and wherein the pressure in the area of reduced pressure is maintained above the saturated vapor pressure of the liquid medium sufficient to prevent formation of cavitation bubbles. Currently amended
The method of claim 1, wherein the first pressure is at least 1000 PSI. Original
The method of claim 1, wherein the second pressure is less than 20 % of the first pressure. Original
The method of claim 1, wherein the graphene material produced by the method is graphene sheets, graphene plates or a mixture thereof. Original
The method of claim 1, wherein the graphite suspension passes through one or more orifices, nozzles or apertures in the local constriction. Original
The method of claim 1, wherein said liquid medium comprises water, organic solvent, alcohol, acid, a monomer, an oligomer, a resin, or a combination thereof. Original
The method of claim 1, wherein said liquid medium comprises a surfactant. Original
The method of claim 1, wherein said graphitic material particles comprise natural graphite, synthetic graphite, highly oriented pyrolytic graphite, meso-carbon micro-bead, coke, graphitized meso-phase carbon, graphitized soft carbon, carbon or graphite fiber or whisker, carbon or graphitic nano-fiber, exfoliated graphite, expanded graphite, or a combination thereof. Original
The method of claim 1, wherein said liquid medium comprises a monomer or a polymer dissolved or dispersed therein to form a nanocomposite precursor suspension. Original
The method of claim 1, wherein the graphite suspension is exposed to the compression and explosive decompression treatment at least 20 times. Original
The method of claim 1, wherein the graphite suspension is compressed by use of a pressure intensifier or a pump. Original
The method of claim 1, wherein the second pressure is less than 10 % of the first pressure. Original
The method of claim 1, wherein the first pressure is at least 10,000 PSI. Original
Canceled. Canceled
Canceled. Canceled
Materials described outside the worked examples.
graphene material
graphitic material particles
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Duration | 0.000001 second | — |
Pressure |
graphene sheets and plates
liquid medium
surfactant
monomer or polymer in liquid medium (nanocomposite precursor)
surfactant selected from anionic, nonionic, cationic, amphoteric, silicone, fluoro-, polymeric surfactants, sodium hexametaphosphate, sodium lignosulphonate, poly(sodium 4-styrene sulfonate), sodium dodecylsulfate, sodium sulfate, sodium phosphate, sodium sulfonate
| ≥ 1 PSI |
| — |
Pressure | ≥ 10000 PSI | — |
graphene sheets and plates
liquid medium
surfactant
monomer or polymer in liquid medium (nanocomposite precursor)
surfactant selected from anionic, nonionic, cationic, amphoteric, silicone, fluoro-, polymeric surfactants, sodium hexametaphosphate, sodium lignosulphonate, poly(sodium 4-styrene sulfonate), sodium dodecylsulfate, sodium sulfate, sodium phosphate, sodium sulfonate
| ≥ 1 PSI |
| — |
Pressure | ≥ 10000 PSI | — |
graphene sheets and plates
liquid medium
surfactant
monomer or polymer in liquid medium (nanocomposite precursor)
surfactant selected from anionic, nonionic, cationic, amphoteric, silicone, fluoro-, polymeric surfactants, sodium hexametaphosphate, sodium lignosulphonate, poly(sodium 4-styrene sulfonate), sodium dodecylsulfate, sodium sulfate, sodium phosphate, sodium sulfonate
| ≥ 1 PSI |
| — |
Pressure | ≥ 10000 PSI | — |
graphene sheets and plates
liquid medium
surfactant
monomer or polymer in liquid medium (nanocomposite precursor)
surfactant selected from anionic, nonionic, cationic, amphoteric, silicone, fluoro-, polymeric surfactants, sodium hexametaphosphate, sodium lignosulphonate, poly(sodium 4-styrene sulfonate), sodium dodecylsulfate, sodium sulfate, sodium phosphate, sodium sulfonate
| ≥ 1 PSI |
| — |
Pressure | ≥ 10000 PSI | — |