METHOD OF PREPARING FUNCTIONALIZED GRAPHENE

Anil K. Sadana

Patent details

Patent

METHOD OF PREPARING FUNCTIONALIZED GRAPHENE

Anil K. Sadana

Claims

Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.

5 independent · 19 dependent

1
Independentgraphenealkali metalether coordinating solvent
A method of preparing functionalized graphene, comprising: treating graphene, with an alkali metal, in the presence of a coordinating solvent, and adding a f u nctionalizing compound wherein that the coordinating solvent comprises at least one of an ether or a tertiary am ine; and wherein the coordinatin g solvent is free of ammonia.
1. 2
  Dependent← claim 1graphene
  The method of claim 1, wherein the graphene has an average particle size of less than about 1 micrometer.
2. 3
  Dependent← claim 1graphene
  The method of claim 1, wherein the graphene has an average particle size of greater than or equal to about 1 micrometer.
3. 5
  Dependent← claim 1graphene
  The method of claim 1, wherein the graphene has a two-dimensional aspect ratio of greater than about 10.
4. 6
  Dependent← claim 1graphene
  The method of claim 1, wherein the graphene is exfoliated by ﬂuorination, acid intercalation, acid intercalation followed by thermal shock treatment, or a combination comprising at least one of the foregoing. TYI₄-51604-US (BA O₀ 797US) 5 Application No. 13/198,342
5. 7
  Dependent← claim 1alkali metal
  The method of claim 1, wherein the alkali metal is lithium, sodium, or potassium. original
6. 9
  Dependent← claim 1ether coordinating solvent
  The method of claim 1 el aim --8-- wherein the ether is tetrahydrofuran, dioxane, diethyl ether, diisopropyl ether, di-n-butyl ether, di-sec-butyl ether, methyl-t-butyl ether, 1,2-dimethoxyethane, 1,2-dimethoxypropane, 1,3- dimethoxypropane, 1,2-diethoxyethane, 1,2-diethoxypropane, 1,3-diethoxypropane, or a combination comprising at least one of the foregoing.
7. 11
  Dependent← claim 1, claim 10tertiary amine coordinating solvent
  The method of claim 10, wherein the tertiary amine is n-methyl piperidine, n-methyl morpholine, N,N,N',N' -tetramethyl- 1,2-diaminoethane, or a combination comprising at least one of the foregoing. 12 The method of claim 1, further comprising a non- coordinating solvent.
8. 14
  Dependent← claim 1
  The method of claim 1, wherein treating is carried out at less than or equal to ambient temperature.
9. 15
  Dependent← claim 1functionalizing compound
  The method of claim 1, wherein the functionalizing compound rdical retie compo coprsig comprises an alkyl halide, aralkyl halide, ester, amide, carbonate, aldehyde, unsaturated ester, or a combination comprising at least one of the foregoing.
10. 16
  Dependent← claim 1
  The method of claim 1, wherein treating comprises dissolving the alkali metal in the coordinating solvent, followed by adding the graphene.
11. 18
  Dependent← claim 1
  The method of claim 1, wherein the alkali metal and the functionalizing compound are present in a molar ratio of about 1.2:1 to 1:1.2, respectively.
12. 19
  Dependent← claim 1
  The method of claim 1, wherein treating is carried out for less than or equal to 1 hour.
13. 20
  Dependent← claim 1
  The method of claim 1, further comprising: quenching unreacted alkali metal by addition of a protic medium, and isolating the functionalized graphene.
14. 21
  Dependent← claim 1functionalized graphene
  The method of claim 1, wherein the functionalized graphene has functional groups including carboxy, epoxy, ether, ketone, amine, hydroxy, TYI₄-51604-US (BA O₀ 797US) 7 Application No. 13/198,342 alkoxy, alkyl, lactone, aryl, functionalized polymeric or oligomeric groups, or a combination comprising at least one of the forgoing functional groups.
15. 25
  Dependent← claim 1ether coordinating solvent
  The method of claim 1, wherein the ether is dioxane, diethyl ether, diisopropyl ether, di-n-butyl ether, di-sec-butyl ether, methyl-t-butyl ether, 1,2- dimethoxyethane, 1,2-dimethoxypropane, 1,3-dimethoxypropane, 1,2-diethoxyethane, TYI₄-51604-US (BA O₀ 797US) 8 SVG 13198342.11-25-2014.I₂XE₉GUXPXXIFW3.CLM₂494038.2.375.385.2179.516.svg 0.437 6.013 Chemistry Black and white Application No. 13/198,342 TYI₄-51604-US (BA O₀ 797US) 9
8
Independent
canceled
10
Independentgraphenealkali metalether coordinating solvent
The hod of claim A method of preparing functionalized graphene, comprising: treating graphene, with an alkali metal, in the presence of a coordinating solvent, and adding a functionalizing compound, wherein the coordinating solvent comprises at least one of an ether; or an amine; and wherein the amine comprises a tertiary amine.
13
Dependent← claim 12
The method of claim 12, wherein the non-coordinating solvent is a hydrocarbon solvent. TYI₄-51604-US (BA O₀ 797US) 6 Application No. 13/198,342
22
Independentgraphenealkali metalether coordinating solventfunctionalizing compound
A method of preparing functionalized graphene, comprising: dissolving an alkali metal, in a coordinating solvent, adding graphene, and adding a functionalizing compound, wherein that the coordinating solvent comprises an ether, a tertiary amine, or a combination comprising at least one of the foregoing; and wherein the coordinating solvent is free of ammonia.
23
Independentgraphenealkali metalfunctionalizing compoundC₄H₈OC₁₀H₈
A method of preparing functionalized graphene, comprising: combining tetrahydrofuran, with naphthalene, dissolving an alkali metal, in the combination of tetrahydrofuran and naphthalene, adding graphene, and adding a functionalizing compound.
1. 24
  Dependent← claim 23Na
  The method of claim 23, wherein the alkali metal comprises sodium.

Materials

Materials described outside the worked examples.

graphene

Starting Material Substrate

alkali metal

Reagent

Process steps

Additional fabrication and treatment steps described in the patent.

Chemical Functionalization

Step 1

Process details

notes:alkali metal dissolved in coordinating solvent; graphene added; functionalizing compound added; unreacted alkali metal quenched with protic medium; functionalized graphene isolated

method:modified Birch reduction without ammonia

quench:protic medium

treatment time:less than or equal to 1 hour

Reported properties

Performance values and ranges asserted in the specification or claims.

Property	Value	Material
—	1–50 w	—
—

Why these are connected

Related documents with shared materials, methods, properties, or citations.

METHOD OF PREPARING FUNCTIONALIZED GRAPHENE | Matter42 Literature