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Graphene composite and method of producing the same

A manufacturing method and graphene technology, applied in the field of graphene composites and its manufacturing, can solve the problems of poor production efficiency and time-consuming graphene dispersion

Active Publication Date: 2016-03-16
GRAPHENE PLATFORM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, although it is conceivable to collect and concentrate the supernatant, there are problems in that the process of repeatedly collecting and concentrating the supernatant takes time for processing, and the production efficiency of the graphene dispersion is poor.

Method used

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  • Graphene composite and method of producing the same
  • Graphene composite and method of producing the same
  • Graphene composite and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122]

[0123] For utilizing such as image 3 A method for obtaining a graphitic carbon raw material usable as a graphene precursor using the shown production apparatus A using a jet mill and plasma will be described. In the manufacturing apparatus A, a case where plasma is performed as a process by radio wave force and a jet mill is used as a process by mechanical force is exemplified.

[0124] image 3 Among them, symbol 1 is a natural graphite material with particles below 5 mm (flaky graphite ACB-50 manufactured by Nippon Graphite Industry Co., Ltd.); 2 is a hopper for containing natural graphite material 1; 3 is a Venturi nozzle for spraying natural graphite material 1 from hopper 2 ; 4 is the jet mill that makes the natural graphite material collide with the jet flow in the cavity from the air sprayed from 5 points and 8 places of the compressor; 7 is the plasma generating device, which makes the oxygen, Argon, nitrogen, hydrogen and other gases 9 are sprayed from t...

Embodiment 2

[0198] In Example 1, the case where ultrasonic treatment and microwave treatment are used in combination to obtain a graphene dispersion has been described, but in Example 2, only ultrasonic treatment is performed without microwave treatment, and other conditions are the same as in Example 1.

[0199] Figure 15 (b) shows the distribution of the number of layers of the graphene dispersion obtained by ultrasonic treatment using the graphene precursor of sample 5 (Rate (3R)=46%) produced by the production apparatus B. It should be noted, Figure 15 (a) Comparison with Sample 5 manufactured by Manufacturing Apparatus B in Example 1 Figure 11 The distribution shown in (b) is the same.

[0200] As a result, the distribution of the number of layers tended to be substantially the same, but the proportion of graphene having 10 or less layers was 64%, which was slightly lower than 68% in Example 1.

[0201] From this, it can be seen that when preparing a graphene dispersion, it is ...

Embodiment 3

[0203] In Example 3, an example using conductive ink will be described.

[0204] Sample 1 (Rate (3R)=23%) of embodiment 1, sample 3 (Rate (3R)=38%), sample 5 (Rate (3R)=46%), sample 6 (Rate ( 3R)=51%) as a graphene precursor, ink 1, ink 3, ink 3, For ink 5 and ink 6, compare their respective resistance values. From this result, it was obtained that the resistance value decreased as Rate (3R) increased.

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Abstract

Provided is a graphene composite using a graphene precursor and a method of producing the same. The graphene composite is a composite of the graphene partially exfoliated from the graphite-based carbon material and dispersed in a base material. The graphene is a crystal of a mean size of 100nm or more and formed in a flake-like or sheet-like shape having 10 layers or less. The graphite-based carbon material is defined by the following (a formula 1) rates based on an X-ray diffraction method: Rate (3R) is more than 31%. Rate (3R) =P3 / (P3+P4)*100...(formula 1), wherein P3 is a peak intensity of a (101) plane of the rhombohedral graphite layer (3R) based on the X-ray diffraction method, and P4 is a peak intensity of a (101) plane of the hexagonal graphite layer (2H) based on the X-ray diffraction method.

Description

[0001] This application is a divisional application. The Chinese national application number for the application is 201580000121.9, the international application number is PCT / JP2015 / 055977, the filing date is February 27, 2015, and the date of entering China is June 15, 2015. , the title of the invention is "Graphite-based carbon raw materials that can be used as graphene precursors and their manufacturing methods." technical field [0002] The present invention relates to a graphene composite using a graphene precursor and a manufacturing method thereof. Background technique [0003] In recent years, the addition of various nanomaterials has been studied in various fields for the purpose of size reduction and weight reduction. In particular, carbon raw materials such as graphene, CNT (carbon nanotubes), and fullerenes have attracted attention as non-metallic nanomaterials in the context of environmental and resource issues. [0004] For example, carbon black has been conv...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 长谷川正治神谷渚
Owner GRAPHENE PLATFORM