A kind of graphene microsheet with network structure and preparation method thereof

A graphene microchip and network structure technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, seawater treatment, etc., can solve problems such as large specific surface area, low yield, and insufficient material application performance. Achieve excellent composite performance, high adsorption rate and good stability

Active Publication Date: 2019-03-22
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent application CN105126764A discloses a graphene macroscopic body material for sewage treatment, through (1) ultrasonic treatment of graphene oxide aqueous solution; (2) adding graphene oxide solution and graphene fiber film into the reaction kettle, heating to constant temperature After natural cooling, freeze-drying has obtained a kind of pore structure developed, and specific surface area is big, is used for the graphene material of sewage treatment, and the preparation method of the present invention is simple, but the application performance of material is still not good enough, and speculates the yield of product according to preparation method. rate may be lower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Exfoliate 10g of graphite into graphene microflakes using a micro extruder; the test found that graphene microflakes are basically composed of graphene with more than 5 layers;

[0037](2) Graphene microchips were prepared as graphene oxide microchips by the Hummers method to obtain 16 g of graphene oxide microchips;

[0038] (3) Add 2g of bentonite, 10g of isopropanol, 1g of acrylic acid and 0.1g of ammonium persulfate into the flask, heat at reflux at 80°C for 2 hours under stirring, then keep stirring, cool naturally for 10 minutes, and filter with suction to obtain Acrylic coated bentonite;

[0039] (4) Disperse the graphene oxide microchips in 50g of water, add 1g of ethylenediamine, 1g of o-phenylenediamine, 5g of p-phenylenediamine, 5g of acrylamide, 1g of vinyl alcohol, and 1g of bentonite coated with acrylic acid, React at 80°C for 12 hours, maintaining magnetic stirring during the reaction;

[0040] (5) Centrifuge the mixed liquid after completing step (...

Embodiment 2

[0043] (1) Exfoliate 10g of graphite into graphene microflakes using a micro extruder; the test found that graphene microflakes are basically composed of graphene with more than 5 layers;

[0044] (2) Graphene microflakes were prepared as graphene oxide microflakes by the Hummers method to obtain 15 g of graphene oxide microflakes;

[0045] (3) Add 2.5g of bentonite, 10g of isopropanol, 1g of acrylic acid and 0.1g of ammonium persulfate into the flask, heat at reflux at 90°C for 1 hour under stirring, then keep stirring, cool naturally for 30 minutes, and filter with suction. Obtain the bentonite coated with acrylic acid;

[0046] (4) Disperse the graphene oxide microchips in 70g of water, add 2g of ethylenediamine, 2g of o-phenylenediamine, 3g of p-phenylenediamine, 3g of acrylamide, 2g of vinyl alcohol, and 2g of bentonite coated with acrylic acid, React at 110°C for 6 hours, maintaining magnetic stirring during the reaction;

[0047] (5) Centrifuge the mixed liquid that c...

Embodiment 3

[0050] (1) Exfoliate 10g of graphite into graphene microflakes using a micro extruder; the test found that graphene microflakes are basically composed of graphene with more than 5 layers;

[0051] (2) Graphene microflakes were prepared as graphene oxide microflakes by the Hummers method to obtain 15 g of graphene oxide microflakes;

[0052] (3) Add 3g of bentonite, 15g of isopropanol, 1g of acrylic acid and 0.15g of ammonium persulfate into the flask, heat at reflux at 80°C for 1.5h under stirring, then keep stirring, cool naturally for 20min, and filter with suction. Obtain the bentonite coated with acrylic acid;

[0053] (4) Disperse the graphene oxide microchips in 100g of water, add 3g of ethylenediamine, 3g of o-phenylenediamine, 5g of p-phenylenediamine, 5g of acrylamide, 3g of vinyl alcohol, and 3g of bentonite coated with acrylic acid, React at 100°C for 8 hours, maintaining magnetic stirring during the reaction;

[0054] (5) The mixed liquid that completed step (3) ...

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Abstract

Disclosed are a graphene micro-sheet having a mesh structure and a preparation method therefor. According to the present invention, by adding a grafted functional group to a graphene micro-sheet, and generating micropores in the graphene micro-sheet during grafting, a graphene micro-sheet having a regular three-dimensional mesh structure, good stability, high adsorption rate, and great composite performance is obtained. The graphene micro-sheet having a mesh structure has super strong adsorbability, is applied to heavy metal adsorption, wastewater treatment, oil pollution collection, seawater desalination, and drink water purification, and can be used in a wide temperature range, a wide pH range, and a wide range of ion components.

Description

technical field [0001] The invention relates to the technical field of graphene, in particular to the technical field of graphene derivatives. Background technique [0002] Graphene is a planar atomic crystal structure in which carbon atoms are closely arranged in a honeycomb shape in regular hexagons. The unique planar structure of graphene makes it possess many characteristics that three-dimensional crystals do not have, such as a specific surface area as high as 2.6×10³m² / g , the thermal conductivity is as high as 3×10³W / (m.K), the mechanical properties are 1.06×10³Gpa, the Young’s modulus is 1.0TPa, and its mechanical strength is as high as 130Gpa, which is more than 100 times that of steel. Graphene has a stable regular hexagonal lattice structure so that it has excellent electrical conductivity, and the electron mobility is as high as 1.5×10 4 cm 2 / (V.s), which is 2 times higher than the maximum mobility of semiconductor indium antimonide and 10 times higher than th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/62C02F103/08
CPCC02F1/28C02F1/62
Inventor 陈庆曾军堂叶任海陈兵
Owner CHENDU NEW KELI CHEM SCI CO LTD
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