Grinding medium for peeling graphene by paste grinding

A technology of exfoliating graphene and grinding media, applied in the field of graphene, can solve the problems of low exfoliation efficiency and long exfoliation time, and achieve the effects of shortening exfoliation time, improving exfoliation efficiency and large specific surface area

Active Publication Date: 2017-05-31
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problems of using a large amount of organic solvents, long stripping time, and low stripping efficiency in the preparation of graphene by liquid phase grinding and stripping, and proposes a grinding medium for slurry grinding and stripping graphene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) The composition of the grinding medium in this embodiment is as follows:

[0026] 30% styrene-maleic anhydride polymer, 30% nano-modified hydrotalcite, 10% nano-aluminum hydroxide, 10% gluten powder, 10% cyclodextrin, 10% urea; wherein the nano-modified hydrotalcite It is a hydrotalcite with a particle size of 10nm modified by cetyltrimethylammonium bromide.

[0027] 2) The preparation method of grinding media is as follows:

[0028] (1) Disperse 30% styrene-maleic anhydride polymer and 30% nano-modified hydrotalcite in a mixed solution of ethanol and water with a volume ratio of 1:1, and stir at a high speed of 1000rpm for 40min to make Styrene-maleic anhydride polymer and nano-modified hydrotalcite form an interpenetrating network structure to obtain a uniformly dispersed mixed solution;

[0029] (2) Mix 10% nano-aluminum hydroxide and 10% urea into the mixed liquid in step (1), stir and mix at a speed of 800rpm for 10 minutes, so that the micro-expansion agent a...

Embodiment 2

[0033] 1) The composition of the grinding medium in this embodiment is as follows:

[0034] 40% polyethylene glycol monostearate, 30% nano-modified hydrotalcite, 10% styrene nanopolymer microspheres, 10% tamarind polysaccharide gum, 5% cyclodextrin, 5% urea; The nano-modified hydrotalcite is a hydrotalcite with a particle size of 50nm obtained by modifying the dodecyltrimethylammonium chloride surfactant.

[0035] 2) The preparation method of grinding media is as follows:

[0036] (1) Disperse 40% polyethylene glycol monostearate and 30% nano-modified hydrotalcite in a mixed solution of ethanol and water with a volume ratio of 1:1, and stir at a high speed of 3000rpm for 30min, Making polyethylene glycol monostearate and nano-modified hydrotalcite form an interpenetrating network structure to obtain a uniformly dispersed mixed solution;

[0037](2) Mix 10% styrene nanopolymer microspheres and 5% urea into the mixed liquid in step (1), stir and mix at a speed of 500rpm for 20...

Embodiment 3

[0041] 1) The composition of the grinding medium in this embodiment is as follows:

[0042] 45% of polycaprolactone-polyethylene glycol copolymer, 25% of nano-modified hydrotalcite, 10% of nano-aluminum hydroxide, 5% of guar gum, 5% of cyclodextrin, and 10% of urea; The modified hydrotalcite is a hydrotalcite with a particle size of 50nm obtained by modifying a cetyltrimethylammonium bromide surfactant.

[0043] 2) The preparation method of grinding media is as follows:

[0044] (1) Disperse 45% polycaprolactone-polyethylene glycol copolymer and 25% nano-modified hydrotalcite in a mixed solution of ethanol and water with a volume ratio of 1:2, and stir at a high speed of 5000rpm 20min, the polycaprolactone-polyethylene glycol copolymer and the nano-modified hydrotalcite form an interpenetrating network structure to obtain a uniformly dispersed mixed solution;

[0045] (2) Mix 10% nano-aluminum hydroxide and 10% urea into the mixed liquid in step (1), stir and mix at a speed ...

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Abstract

The invention belongs to the technical field of graphene and particularly relates to a grinding medium for peeling graphene by paste grinding. The grinding medium is prepared from the following components in percentage by weight: 30%-45% of an amphiphilic polymer, 25%-30% of nano modified hydrotalcite, 10%-15% of a micro-expanding agent, 5%-15% of an adhesive, 5%-10% of cyclodextrin and 5%-10% of urea. After the grinding medium and a graphite material are mixed, the graphite is peeled primarily through the surface bonding function of the grinding medium, graphite is subjected to expansion and intercalation peeling through the micro-expanding agent and a urea intercalator which are wrapped in a network structure of the grinding medium, finally, the graphite is peeled under the action of mechanical force, and the grephene is obtained. The grinding medium is used for preparation of graphene through liquid peeling, use of organic solvents is reduced, the peeling efficiency of graphene is increased by 40% or higher, and the obtained graphene with a single layer or a few layers has higher dispersion performance.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a grinding medium for slurry grinding and exfoliating graphene. Background technique [0002] Graphene has been a research hotspot since its discovery in 2004. Graphene is a two-dimensional material with a honeycomb hexagonal planar structure formed by sp2 hybridization of carbon atoms. Graphene has good electrical and optical properties, mechanical properties, thermal conductivity and high charge carrier mobility, as well as strong mechanical strength and flexibility. It is used in polymer composites, energy materials, electronic communications, Optomagnetic, biological and other fields have broad application prospects. Due to its potential application prospects in many fields, the preparation and application research of graphene has become a research hotspot all over the world. [0003] Since the discovery of graphene, the preparation of graphene has been a rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/19
Inventor 陈庆曾军堂孙丽枝
Owner CHENDU NEW KELI CHEM SCI CO LTD
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