Noncovalent bond-modified carbon structure, and carbon structure/polymer composite comprising same

Patent metadata

Field	Value
Publication number	US-10544324-B2
Application number	US-201415108267-A
Country	US
Kind code	B2
Filing date	Dec 24, 2014
Priority date	Dec 24, 2013
Publication date	Jan 28, 2020
Grant date	Jan 28, 2020

Abstract

According to the present invention, a noncovalent bond-modified carbon structure has advantages of: enabling the control of properties by controlling intervals between carbon structures according to the size and structure of a compound represented by Chemical Formula 1, which is inserted and adsorbed between the carbon structures; and enabling uniform dispersion in a polymer matrix without a change in intrinsic properties. In addition, a carbon structure/polymer composite comprising the modified carbon structure and a polymer matrix is simply manufactured and readily layered due to excellent orientation when forming a cured coating film, and thus can be useful for manufacturing a steel sheet having remarkable heat radiation, surface polarity, electrical properties and the like.

First claim

The invention claimed is:

1. A carbon structure non-covalently bonded to a compound represented by the following <Structure 2-6> to <Structure 2-10>:

2. The carbon structure according to claim 1 ,
wherein the carbon structure is one or more types selected from a group consisting of carbon nanotubes (CNT), graphene, and graphene nanoplatelets.

3. A carbon structure/polymer composite comprising;
a polymer matrix; and
a carbon structure non-covalently bonded to a compound represented by the following <Structure 2-6> to <Structure 2-10>,
wherein the carbon structure has a structure in which the carbon structure is dispersed in the polymer matrix, and
a content of the carbon structure is 0.1 to 20 parts by weight with respect to 100 parts by weight of the polymer matrix, and <Structure 2-6> to <Structure 2-10> are as follows:

4. A method for preparing a carbon structure/polymer composite, comprising:
a step of preparing a mixture in which a suspension in which a carbon structure is dispersed is mixed with a solution in which a compound represented by the following <Structure 2-6> to <Structure 2-10> is dissolved;
a step of obtaining a modified carbon structure from the mixture; and
a step of dispersing the modified carbon structure in a polymer matrix,
wherein a concentration of a solution in which the compound represented by <Structure 2-6> to <Structure 2-10> is dissolved is 0.1 to 5 M:

5. The method for preparing the carbon structure/polymer composite according to claim 4 ,
wherein the carbon structure of a carbon structure suspension is dispersed in one or more solvents selected from the group consisting of water and a C 1-4 alkyl alcohol.

6. The method for preparing the carbon structure/polymer composite according to claim 4 ,
wherein the step of obtaining the modified carbon structure comprises:
a step of obtaining a solid content of the modified carbon structure by concentrating a mixture;
a step of pulverizing the solid content; and
a step of adding the solid content or a polymer matrix into a solvent.

7. The method for preparing the carbon structure/polymer composite according to claim 4 ,
wherein any one or more steps of the step of preparing the mixture and the step of dispersing the modified carbon structure in the polymer matrix are performed by ultrasonically irradiating or stirring.

8. The method for preparing the carbon structure/polymer composite according to claim 7 ,
wherein ultrasonic wave irradiation is performed at 60° C. or less.

9. A steel comprising a cured coating film formed on one side or both sides of the steel sheet,
wherein the cured coating film has a carbon structure/polymer composite comprising a polymer matrix and a carbon structure non-covalently bonded to a compound represented by the following <Structure 2-6> to <Structure 2-10>, wherein the carbon structure/polymer composite has a structure in which the carbon structure is dispersed in the polymer matrix, and <Structure 2-6> to <Structure 2-10> are as follows:

10. The steel sheet according to claim 9 ,
wherein the carbon structure is one or more types selected from a group consisting of carbon nanotubes (CNT), graphene, and graphene nanoplatelets.

11. The steel sheet according to claim 9 ,
wherein a content of the carbon structure is 0.1 to 20 parts by weight with respect to 100 parts by weight of the polymer matrix.

Assignees

• Posco

Inventors

• Jung Yong-Gyun
• Yoo Hye Jin
• Kim Jung-Su
• Kim Jong Sang
• Byeon Chang-Se

Classifications

• C09D7/62

  modified by treatment with other compounds · CPC title

• C01B32/15

  Nano-sized carbon materials · CPC title

• C08K3/042

  Graphene or derivatives, e.g. graphene oxides · CPC title

• C01B32/194

  After-treatment · CPC title

• C09D17/004 Primary

  containing an inorganic pigment · CPC title