Partially oxidized graphene and preparation method therefor

A technology of graphene and graphite, which is applied in the field of partial graphene oxide and its preparation, can solve the problems of small graphene, difficult to obtain, insufficient peeling yield, etc., and achieve improved sheet resistance, excellent dispersibility, and excellent dispersibility Effect

Inactive Publication Date: 2017-08-01
LG CHEM LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods also have problems: it is difficult to obtain graphene with sufficiently small thickness and large area, many defects are generated in graphene during the exfoliation process, or the exfoliation yield is insufficient, etc.

Method used

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  • Partially oxidized graphene and preparation method therefor
  • Partially oxidized graphene and preparation method therefor
  • Partially oxidized graphene and preparation method therefor

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Experimental program
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Embodiment

[0076] step 1

[0077]2.5 g of raw graphite (BNB90) was added to 262.5 mL of ice-cooled mixed solution of sulfuric acid and nitric acid (volume ratio of sulfuric acid to nitric acid=3:1), and stirred at about 500 rpm. They were reacted in an oil bath at the temperature and time shown in Table 1 below, thereby partially oxidizing the original graphite. After the reaction, the reaction mixture was cooled to room temperature, and slowly added to 1 L of ice-cooled distilled water. The reaction solution diluted with distilled water was filtered under vacuum to recover part of the graphite oxide, and dried overnight in an oven at 100°C. The partially oxidized graphite prepared according to the reaction temperature and reaction time was named "poGF-(reaction temperature)-(reaction time)", as shown in Table 1 below.

[0078] [Table 1]

[0079] Example temperature reflex Reaction time poGF-75-20 75℃ 20 hours poGF-85-20 85℃ 20 hours poGF-90-16 90℃ ...

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Abstract

The present invention relates to partially oxidized graphene and a preparation method therefor. Since partially oxidized graphene is prepared by high-pressure homogenizing partially oxidized graphite, exfoliation efficiency is excellent, the inherent characteristics of graphene are maintained even without using a reduction process after exfoliation, and the dispersibility thereof in organic solvents is excellent, and thus the present invention can be applied to various fields.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority from Korean Patent Application No. 10-2014-0179764 filed on December 12, 2014 at the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The invention relates to a partial graphene oxide and a preparation method thereof. Background technique [0004] Graphene is a semimetallic substance in which carbon atoms are arranged in a hexagonal shape connected by two-dimensional sp2 bonding while having a thickness equivalent to a layer of carbon atoms. Recently, it has been reported to evaluate the properties of graphene flakes with one carbon atomic layer, and as a result, graphene flakes can exhibit about 50,000 cm 2 Very excellent conductivity with electron mobility above / Vs. [0005] In addition, graphene has the characteristics of structural and chemical stability and excellent thermal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198C01B32/192
CPCC01P2002/72C01P2004/03C01P2004/04C01B32/192C01B2204/04C01B2204/32C01P2002/82C01B32/23Y10S977/734Y10S977/842C01B32/184C01B32/198B82Y30/00B82Y40/00
Inventor 孙权男李美真权元钟朴世浩柳光铉
Owner LG CHEM LTD
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