# US 2019/0169032 A1 · Method For Preparing Functionalized Graphene

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- Number: US 2019/0169032 A1
- Document ID: US20190169032A1
- Status: Published application
- Kind: A1
- Application number: 16/303,427
- Filed: 2017-11-20
- Published: 2019-06-06
- Earliest claimed: 2016-12-14
- Assignees: LG Chem, Ltd.
- Applicants: LG Chem, Ltd.
- Inventors: Mi Jin Lee; Won Jong Kwon; Gwang Hoon Jun; Ji Yeon Byeon; Yu Ra Lee
- Web page: https://patentgrep.com/patent/US20190169032A1

## CPC

- C01B 32/194: After-treatment
- C09C 1/44: Carbon
- C09C 3/08: Treatment with low-molecular-weight {non-polymer} organic compounds {(C09C3/006, C09C3/048 take precedence)}
- C01B 2204/22: Electronic properties
- C01B 2204/24: Thermal properties
- C01P 2002/86: by NMR- or ESR-data
- C01P 2002/88: by thermal analysis data, e.g. TGA, DTA, DSC
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C09C: TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES (treatment of materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone C04B14/00, C04B18/00, C04B20/00); PREPARATION OF CARBON BLACK {; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS}
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

The present invention relates to a method for preparing a functionalized graphene. The method for preparing a functionalized graphene according to the present invention can functionalize graphene by a simple method and does not use any other substance other than graphene and a salt containing a double bond, thereby enabling functionalization of graphene while exhibiting characteristics inherent to graphene.

## Claims

### Claim 1

A method for preparing a functionalized graphene comprising
1) mixing graphene with a salt containing a double bond to prepare a mixture;
2) heat-treating the mixture at 120 to 400° C., and
3) forming the functionalized graphene.

### Claim 2 (depends on 1)

The method of claim 1,
wherein the salt containing a double bond is a compound represented by the following Chemical Formula 1 or 2:
in Chemical Formula 1,
R1 is a single bond; a substituted or unsubstituted alkylene having 1 to 60 carbon atoms; or a substituted or unsubstituted arylene having 6 to 60 carbon atoms,
X1 is CO, or SO2, and
M1 is an alkali metal,
M2O—X2—R2—X2—OM2 [Chemical Formula 2]
in Chemical Formula 2,
R2 is a substituted or unsubstituted alkenylene having 1 to 60 carbon atoms,
X2 is CO, or SO2, and
M1 is an alkali metal.

### Claim 3 (depends on 2)

The method of claim 2,
wherein R1 is a single bond; or phenylene.

### Claim 4 (depends on 2)

The method of claim 2,
wherein R2 is ethenylene (—CH═CH—).

### Claim 5 (depends on 2)

The method of claim 2,
wherein the salt containing a double bond is 4-styrenesulfonic acid sodium salt, sodium acrylate, maleic acid sodium salt, or vinylsulfonic acid sodium salt.

### Claim 6 (depends on 2)

The method of claim 2,
wherein the salt containing a double bond is mixed in an amount of 0.2 to 5.0 parts by weight based on 1 part by weight of graphene.

### Claim 7 (depends on 2)

The method of claim 2,
wherein the heat treating is performed at a temperature of 150 to 300° C.

### Claim 8 (depends on 2)

The method of claim 2,
wherein the heat treating is performed for 10 minutes to 24 hours.