Preparation method of nano-graphite carbon powder

A nano-graphite and carbon powder technology, applied in the field of nanomaterials, can solve the problems of long production cycle, high cost and low yield, and achieve the effects of low production cost, fast reaction speed and uniform particle size distribution.

Active Publication Date: 2013-11-20
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: overcome the problems of long production period, high cost and low yield of nano-graphite carbon powder in the prior art, and provide a production period short, low production cost, simple and convenient operation, suitable for large-scale industrial production The preparation method of nano graphite carbon powder

Method used

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  • Preparation method of nano-graphite carbon powder
  • Preparation method of nano-graphite carbon powder
  • Preparation method of nano-graphite carbon powder

Examples

Experimental program
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Effect test

Embodiment 1

[0049] (1) 1 weight part of natural flake graphite and 5 weight parts of 98% vitriol oil are mixed evenly, and the mass concentration of 0.1 weight part is added to be 30% hydrogen peroxide solution, control temperature is 40 ℃, mechanical stirring 40min, filter Deacidification, washing the intercalated product to pH 7, and drying at 100°C for 2 hours to obtain expandable graphite;

[0050] (2) The expandable graphite obtained in step (1) is subjected to microwave expansion treatment to form expanded graphite, and the microwave expansion time is 30s and the power is 800W;

[0051] (3) Press the expanded graphite obtained in step (2) into an expanded graphite plate (3), put the expanded graphite plate (3) into the microporous filter membrane sieving assembly, press and seal it and place it in the electrolytic cell. Positive and negative electrodes, pour the ferric chloride solution with a mass concentration of 9% into the electrolytic cell as the electrolyte, place the electrol...

Embodiment 2

[0061] (1) 1 weight part of natural flake graphite and 3 weight parts of 98% vitriol oil are mixed evenly and then add 1 weight part of the hydrogen peroxide solution that the mass concentration is 30%, the control temperature is 60 ℃, mechanical stirring 60min, filtration Deacidification, washing the intercalated product to pH 7, and drying at 100°C for 2 hours to obtain expandable graphite;

[0062] (2) The expanded graphite is prepared by microwave method, and the expandable graphite obtained in step (1) is subjected to microwave expansion treatment into expanded graphite, and the microwave expansion time is 20s and the power is 900W;

[0063] (3) Press the expanded graphite obtained in step (2) into an expanded graphite plate (3), put the expanded graphite plate (3) into the microporous filter membrane sieving assembly, press and seal it and place it in the electrolytic cell. Positive and negative electrodes, pour the cobalt trichloride solution with a mass concentration o...

Embodiment 3

[0069] (1) after 1 weight part of natural flake graphite and 8 weight parts of 98% vitriol oil are mixed, add the hydrogen peroxide solution that the mass concentration of 2 weight parts is 30%, control temperature is 50 ℃, mechanical stirring 40min, filter Deacidification, washing the intercalated product to pH 7, and drying at 100°C for 3 hours to obtain expandable graphite;

[0070] (2) The expanded graphite is prepared by a microwave method, and the expandable graphite obtained in step (1) is subjected to microwave expansion treatment to obtain expanded graphite, and the microwave expansion time is 30s and the power is 500W;

[0071] (3) Press the expanded graphite obtained in step (2) into an expanded graphite plate (3), put the expanded graphite plate (3) into the microporous filter membrane sieving assembly, press and seal it and place it in the electrolytic cell. Positive and negative electrodes, pour the mixed solution of 6.0% titanium tetrachloride and 5% sodium dode...

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Abstract

The invention relates to a preparation method of nano-graphite carbon powder. The method comprises the steps of: (1) preparing expansible graphite by a chemical oxidation intercalation process; (2) preparing expanded graphite by a microwave process; (3) pressing the expanded graphite into a expanded graphite sheet, putting it into a microporous filter membrane sieving assembly, conducting pressing and sealing, then placing the assembly at the anode and cathode of an electrolytic bath, taking a chlorate solution as an electrolyte solution, carrying out ultrasonic electrolysis at a temperature below 60DEG C, controlling the electrolytic current at 5-18A / cm<2>, the voltage at 6-20V, the ultrasonic oscillation power at 200-600W, and the frequency at 20-40kHz, inverting the anode and the cathode at an interval of 8-15min, completing electrolysis when the concentration of sol in the electrolytic bath is 2-5%, thus obtaining nano-graphite carbon sol; and (4) adding ammonium sulphate into the nano-graphite carbon sol till the mass concentration of ammonium sulfate reaches 5-8%, stirring them uniformly, then performing freeze drying, thus obtaining the nano-graphite carbon powder. The method has the advantages of mild reaction condition and high speed, thus being suitable for industrialized mass production.

Description

technical field [0001] The invention belongs to the field of nanomaterials, in particular to a nanometer graphite carbon powder. Background technique [0002] Graphite is an allotrope of elemental carbon. It is a natural element mineral with a crystal structure between atomic crystal, metal crystal and molecular crystal, which belongs to a transitional crystal of hexagonal or trigonal system. The graphite crystals all form three covalent single bonds with sp2 hybrid orbitals and three adjacent carbon atoms and are arranged in a planar hexagonal network structure. These network structures are connected by van der Waals forces into parallel planes to form a lamellar structure. . The intra-layer atomic spacing is 0.142 nm, and the interlayer spacing is 0.335 nm. Graphite has acid resistance, corrosion resistance, high temperature resistance of 3000 ℃, low temperature resistance of -204 ℃, compressive strength greater than 800kg / Cm2, and oxidation resistance, but also has stro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00C01B32/15C01B32/21
Inventor 胡国民张培模张日清范志利刘伟凯唐富
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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