Patent
US 9,527,745Title: METHOD FOR PRODUCING FEW-LAYER GRAPHENE
YU, Aiping, CHABOT, Victor, CHEN, Zhongwei
26 June 2014·US
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Patent
Atlas literature
Patent
US 9,527,745Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 a schematically illustrates a method according to an aspect of the 13 invention for obtaining a few-layer graphene. 14
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 for producing graphene, the method comprising: a) contacting graphite with a polymer solution to exfoliate graphene from the graphite by forming a graphene-polymer composite; b) separating graphite from the solution containing the graphene-polymer composite; c) treating the solution containing the graphene-polymer composite to disassociate graphene from the polymer; and, d) isolating graphene from the solution.
The method of claim 1, wherein the polymer solution of step (a) comprises a polymer and a solvent.
The method of claim 1 or 2, L wherein the polymer is a biopolymer.
The method of any one of claims 1 to 5,c laim 1, wherein the contacting step (a) comprises sonicating the solution of the graphite and the polymer.
The method of any one of claims 1 to 8,c laim 1, wherein step (b) comprises centrifuging the solution.
The method of any one of claims 1 to 9,c laim 1, wherein step (c) comprises hydrolyzing the polymer of the graphene-polymer composite.
The method of any one of claims 1 to 1, claim 1, wherein step (d) comprises centrifugation of the solution after treatment according to step (c).
Materials described outside the worked examples.
graphene
polymer
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
few-layer graphene layer count | 1–10 layers | few-layer graphene |
few-layer graphene platelet thickness | ≤ 5 nm |
Related documents with shared materials, methods, properties, or citations.
GRAPHENE NANOPLATELETS- OR GRAPHITE NANOPLATELETS-BASED NANOCOMPOSITES FOR REDUCING ELECTROMAGNETIC INTERFERENCES
METHOD OF PREPARING GRAPHENE NANOPLATE, PREPARED GRAPHENE NANOPLATE, GRAPHENE NANOPLATE PASTE, AND CONDUCTIVE LAYER INCLUDING THE GRAPHENE NANOPLATE
Patent
Atlas literature
Patent
US 9,527,745Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 a schematically illustrates a method according to an aspect of the 13 invention for obtaining a few-layer graphene. 14
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 for producing graphene, the method comprising: a) contacting graphite with a polymer solution to exfoliate graphene from the graphite by forming a graphene-polymer composite; b) separating graphite from the solution containing the graphene-polymer composite; c) treating the solution containing the graphene-polymer composite to disassociate graphene from the polymer; and, d) isolating graphene from the solution.
The method of claim 1, wherein the polymer solution of step (a) comprises a polymer and a solvent.
The method of claim 1 or 2, L wherein the polymer is a biopolymer.
The method of any one of claims 1 to 5,c laim 1, wherein the contacting step (a) comprises sonicating the solution of the graphite and the polymer.
The method of any one of claims 1 to 8,c laim 1, wherein step (b) comprises centrifuging the solution.
The method of any one of claims 1 to 9,c laim 1, wherein step (c) comprises hydrolyzing the polymer of the graphene-polymer composite.
The method of any one of claims 1 to 1, claim 1, wherein step (d) comprises centrifugation of the solution after treatment according to step (c).
Materials described outside the worked examples.
graphene
polymer
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
few-layer graphene layer count | 1–10 layers | few-layer graphene |
few-layer graphene platelet thickness | ≤ 5 nm |
Related documents with shared materials, methods, properties, or citations.
GRAPHENE NANOPLATELETS- OR GRAPHITE NANOPLATELETS-BASED NANOCOMPOSITES FOR REDUCING ELECTROMAGNETIC INTERFERENCES
METHOD OF PREPARING GRAPHENE NANOPLATE, PREPARED GRAPHENE NANOPLATE, GRAPHENE NANOPLATE PASTE, AND CONDUCTIVE LAYER INCLUDING THE GRAPHENE NANOPLATE
Patent
Atlas literature
Patent
US 9,527,745Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 a schematically illustrates a method according to an aspect of the 13 invention for obtaining a few-layer graphene. 14
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 for producing graphene, the method comprising: a) contacting graphite with a polymer solution to exfoliate graphene from the graphite by forming a graphene-polymer composite; b) separating graphite from the solution containing the graphene-polymer composite; c) treating the solution containing the graphene-polymer composite to disassociate graphene from the polymer; and, d) isolating graphene from the solution.
The method of claim 1, wherein the polymer solution of step (a) comprises a polymer and a solvent.
The method of claim 1 or 2, L wherein the polymer is a biopolymer.
The method of any one of claims 1 to 5,c laim 1, wherein the contacting step (a) comprises sonicating the solution of the graphite and the polymer.
The method of any one of claims 1 to 8,c laim 1, wherein step (b) comprises centrifuging the solution.
The method of any one of claims 1 to 9,c laim 1, wherein step (c) comprises hydrolyzing the polymer of the graphene-polymer composite.
The method of any one of claims 1 to 1, claim 1, wherein step (d) comprises centrifugation of the solution after treatment according to step (c).
Materials described outside the worked examples.
graphene
polymer
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
few-layer graphene layer count | 1–10 layers | few-layer graphene |
few-layer graphene platelet thickness | ≤ 5 nm |
Related documents with shared materials, methods, properties, or citations.
GRAPHENE NANOPLATELETS- OR GRAPHITE NANOPLATELETS-BASED NANOCOMPOSITES FOR REDUCING ELECTROMAGNETIC INTERFERENCES
METHOD OF PREPARING GRAPHENE NANOPLATE, PREPARED GRAPHENE NANOPLATE, GRAPHENE NANOPLATE PASTE, AND CONDUCTIVE LAYER INCLUDING THE GRAPHENE NANOPLATE
Patent
Atlas literature
Patent
US 9,527,745Patent drawings and their descriptions. Click a drawing to enlarge it.
Figure 1 a schematically illustrates a method according to an aspect of the 13 invention for obtaining a few-layer graphene. 14
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 for producing graphene, the method comprising: a) contacting graphite with a polymer solution to exfoliate graphene from the graphite by forming a graphene-polymer composite; b) separating graphite from the solution containing the graphene-polymer composite; c) treating the solution containing the graphene-polymer composite to disassociate graphene from the polymer; and, d) isolating graphene from the solution.
The method of claim 1, wherein the polymer solution of step (a) comprises a polymer and a solvent.
The method of claim 1 or 2, L wherein the polymer is a biopolymer.
The method of any one of claims 1 to 5,c laim 1, wherein the contacting step (a) comprises sonicating the solution of the graphite and the polymer.
The method of any one of claims 1 to 8,c laim 1, wherein step (b) comprises centrifuging the solution.
The method of any one of claims 1 to 9,c laim 1, wherein step (c) comprises hydrolyzing the polymer of the graphene-polymer composite.
The method of any one of claims 1 to 1, claim 1, wherein step (d) comprises centrifugation of the solution after treatment according to step (c).
Materials described outside the worked examples.
graphene
polymer
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
few-layer graphene layer count | 1–10 layers | few-layer graphene |
few-layer graphene platelet thickness | ≤ 5 nm |
Related documents with shared materials, methods, properties, or citations.
GRAPHENE NANOPLATELETS- OR GRAPHITE NANOPLATELETS-BASED NANOCOMPOSITES FOR REDUCING ELECTROMAGNETIC INTERFERENCES
METHOD OF PREPARING GRAPHENE NANOPLATE, PREPARED GRAPHENE NANOPLATE, GRAPHENE NANOPLATE PASTE, AND CONDUCTIVE LAYER INCLUDING THE GRAPHENE NANOPLATE
graphite
biopolymer
Gum Arabic
guar gum
locust bean gum
carrageen gum
xanthan gum
nitric acid
HNO₃
sulfuric acid
H₂SO₄
few-layer graphene
graphene yield from graphite | 10–15 wt% | few-layer graphene |
graphene purity | ≥ 99.9 % | few-layer graphene |
Temperature | 34–50 °C | — |
Duration | 1–100 hours | — |
Duration | 60–100 hours | — |
Duration | 1–24 hours | — |
Temperature | 200–400 °C | — |
Thickness | 2–3 nm | — |
Thickness | 20–30 cm | — |
Temperature | 0–200 °C | — |
graphite
biopolymer
Gum Arabic
guar gum
locust bean gum
carrageen gum
xanthan gum
nitric acid
HNO₃
sulfuric acid
H₂SO₄
few-layer graphene
graphene yield from graphite | 10–15 wt% | few-layer graphene |
graphene purity | ≥ 99.9 % | few-layer graphene |
Temperature | 34–50 °C | — |
Duration | 1–100 hours | — |
Duration | 60–100 hours | — |
Duration | 1–24 hours | — |
Temperature | 200–400 °C | — |
Thickness | 2–3 nm | — |
Thickness | 20–30 cm | — |
Temperature | 0–200 °C | — |
graphite
biopolymer
Gum Arabic
guar gum
locust bean gum
carrageen gum
xanthan gum
nitric acid
HNO₃
sulfuric acid
H₂SO₄
few-layer graphene
graphene yield from graphite | 10–15 wt% | few-layer graphene |
graphene purity | ≥ 99.9 % | few-layer graphene |
Temperature | 34–50 °C | — |
Duration | 1–100 hours | — |
Duration | 60–100 hours | — |
Duration | 1–24 hours | — |
Temperature | 200–400 °C | — |
Thickness | 2–3 nm | — |
Thickness | 20–30 cm | — |
Temperature | 0–200 °C | — |
graphite
biopolymer
Gum Arabic
guar gum
locust bean gum
carrageen gum
xanthan gum
nitric acid
HNO₃
sulfuric acid
H₂SO₄
few-layer graphene
graphene yield from graphite | 10–15 wt% | few-layer graphene |
graphene purity | ≥ 99.9 % | few-layer graphene |
Temperature | 34–50 °C | — |
Duration | 1–100 hours | — |
Duration | 60–100 hours | — |
Duration | 1–24 hours | — |
Temperature | 200–400 °C | — |
Thickness | 2–3 nm | — |
Thickness | 20–30 cm | — |
Temperature | 0–200 °C | — |