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Dispersion

A technology of liquid dispersion and dispersion medium, applied in the field of dispersion, which can solve the problems of increased chemical functionalization and negative effects of defect performance

Pending Publication Date: 2022-04-01
APPL GRAPHENE MATERIALS UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] It has been observed that although chemical functionalization of graphene / graphite nanosheets can improve their dispersion, chemical functionalization can also increase their defects and have a negative impact on their properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0080] Example 1: Dispersion of graphite material A-GNP 10 in butyl acetate

[0081] As shown in Table 1, reference dispersion samples of BA1-BA3 were fabricated, including graphite material A-GNP10 and butyl acetate.

[0082] Table 1

[0083] reference sample Graphene / Graphite Materials grinding resin D solvent BA1 10wt% AGNP-10 - - Butyl acetate BA2 10wt% AGNP-10 - DISPERBYK-2150 Butyl acetate BA3 10wt% AGNP-10 Laropal A81 - Butyl acetate

[0084] Graphite material A-GNP10 is commercially available from Applied Graphene Materials UK Limited in the United Kingdom and comprises 25-35 layers of atomically thick graphene nanoplatelets. Graphite nanoplatelets are supplied in powder form and are usually aggregated into bulk nanoplatelets.

[0085] Each of samples BA1-BA3 were fabricated using the following steps:

[0086] 1 Add any grinding resins and / or wetting agents in the sample to the butyl acetate. Stir it unti...

example 2

[0099] Example 2: Dispersion of graphite material A-GNP10 in methyl ethyl ketone

[0100] As shown in Table 6, reference dispersion samples of MEK1-MEK3 including graphite material A-GNP10 and methyl ethyl ketone were fabricated.

[0101] Table 6

[0102] reference sample Graphene / Graphite Materials grinding resin D solvent MEK1 10wt% AGNP-10 - - methyl ethyl ketone MEK2 10wt% AGNP-10 - DISPERBYK-2150 methyl ethyl ketone MEK3 10wt% AGNP-10 Laropal A81 - methyl ethyl ketone

[0103] Each of samples MEK1-MEK3 was fabricated using the same procedure set forth above in relation to samples BA1-BA3.

[0104] Table 7: Particle size distribution of MEK dispersions

[0105]

[0106] Table 8: Shear rate (v) for 10s at 23°C -1 Viscosity measurements of MEK dispersions produced when

[0107] reference sample GNP type Initial viscosity (Pa.s) MEK1 A-GNP10 0.000826 MEK2 A-GNP10 0.00104 ...

example 3

[0114] Example 3: Dispersion of graphite material A-GNP10 in xylene

[0115] As shown in Table 11, reference dispersion samples of X1-X3 were fabricated, including graphite material A-GNP10 and xylene.

[0116] Table 11

[0117] reference sample Graphene / Graphite Materials grinding resin D solvent X1 10wt% AGNP-10 - - Xylene X2 10wt% AGNP-10 - DISPERBYK-2150 Xylene X3 10wt% AGNP-10 Laropal A81 - Xylene

[0118] Each of samples X1-X3 was fabricated using the same procedure as stated above in relation to samples BA1-BA3.

[0119] Table 12: Particle Size Distribution of Xylene Dispersions

[0120]

[0121] Table 13: Shear rate (v) for 10s at 23°C -1 Viscosity measurements of MEK dispersions produced when

[0122] reference sample GNP type Initial viscosity (Pa.s) X1 A-GNP10 0.1453 X2 A-GNP10 0.00337 X3 A-GNP10 0.2846

[0123] image 3 A graph showing the relationship betw...

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Abstract

A method of forming a liquid dispersion of 2D material / graphite nanosheets is disclosed. The method comprises the following steps: (1) creating a dispersion medium; (2) mixing the 2D material / graphite nanosheet into a dispersion medium; and (3) subjecting the 2D material / graphite nanosheets to sufficient shear and / or crush forces to reduce the particle size of the 2D material / graphite nanosheets. The liquid dispersion includes 2D material / graphite nanosheets, at least one abrasive medium, and at least one non-aqueous solvent.

Description

technical field [0001] The present invention relates to dispersions, and in particular, to dispersions comprising two-dimensional (2D) materials and methods of making such dispersions. Background technique [0002] 2D materials as referred to herein include one or more of known 2D materials and / or graphite flakes having at least one nanoscale dimension or mixtures thereof. They are collectively referred to herein as "2D materials / graphite nanoplates" or "2D materials / graphite nanoplates". [0003] 2D materials (sometimes called monolayer materials) are crystalline materials composed of a single layer of atoms or multiple layers of atoms. Layered 2D materials consist of 3D structures formed by weakly stacked or bonded 2D layers. The 2D material nanoplates have a thickness in the nanometer scale or less, and the other two dimensions of the 2D material nanoplates are generally on the scale larger than the nanoscale. [0004] Known 2D nanomaterials include, but are not limite...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F23/50
CPCC01B32/194C01B32/21C01B2204/32C01P2004/24C01P2004/64C01B2204/04C01P2006/22
Inventor W·韦弗L·奇科莎J·普夫劳默S·阿普尔亚德R·韦德尔
Owner APPL GRAPHENE MATERIALS UK LTD
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