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Method for preparing graphite nanosheet using high-energy ball mill

A technology of nano-flakes and high-energy ball milling, which is applied in the field of nano-material preparation, can solve the problems of expensive equipment, difficulty in enlarging the process, and long time consumption, and achieve the effects of small environmental impact, simple process, and low cost

Inactive Publication Date: 2011-03-30
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above-mentioned various preparation methods, the ultrasonic method has a simple preparation process, and the particle size and purity of the product can meet the requirements, but the equipment is expensive, and the preparation process consumes a lot of energy and takes a long time, so it cannot be applied to large-scale industrial production at present; the laser pulse method has a fast response speed, The efficiency is high, but the energy consumption is extremely high, the process is difficult to scale up, and it is difficult to meet the needs of mass production; the electrochemical method is clean, safe, and easy to operate, but the speed is slow and the output is low, and it is difficult to meet the needs of mass production

Method used

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  • Method for preparing graphite nanosheet using high-energy ball mill
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  • Method for preparing graphite nanosheet using high-energy ball mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The method for preparing graphite nano flakes by high-energy ball milling includes the following steps:

[0043] 1) Weigh 10g of expanded graphite with an expansion capacity of 290mL / g, weigh 142g of copper chloride chemical reagent (the molar ratio of copper chloride to expanded graphite is 1:1), and the particle size of copper chloride is less than 1 mm;

[0044] 2) Put expanded graphite and copper chloride into a 500mL agate ball milling jar, and put 300g agate grinding balls (the total volume of grinding ball, copper chloride and expanded graphite accounts for about 1 / 2 of the volume of the grinding jar);

[0045] 3) Install the ball milling jar on the planetary ball mill and mill it at a speed of 580 rpm for 8 hours. Pour out the ball mill products and balls from the ball milling jar, and rinse the wall of the milling jar with distilled water until it is washed and adhered to the wall. Of ball milling products;

[0046] 4) Rinse the poured ball mill products and balls with...

Embodiment 2

[0050] The method for preparing graphite nano flakes by high-energy ball milling includes the following steps:

[0051] 1) Weigh 20g of expanded graphite with an expansion volume of 310mL / g, weigh 195g of chemically pure sodium chloride (the molar ratio of sodium chloride to expanded graphite is 2:1), and the particle size of sodium chloride is less than 1 mm;

[0052] 2) Pour expanded graphite and sodium chloride into an alumina ball milling tank with a volume of 500 mL, then add 100 mL of absolute ethanol, and put in about 200 g of alumina grinding balls (the total volume of the grinding balls, sodium chloride and expanded graphite accounts for about Volume of grinding tank 3 / 5);

[0053] 3) Install the ball milling tank on the planetary ball mill, ball milling at a speed of 580 rpm for 6 hours, and pour the ball mill products and balls from the ball milling tank;

[0054] 4) Rinse the ball mill products and balls with distilled water, sort out the alumina balls, add water to 1000mL...

Embodiment 3

[0057] The method for preparing graphite nano flakes by high-energy ball milling includes the following steps:

[0058] 1) Weigh 60g of expanded graphite with an expansion volume of 310mL / g, weigh 850g of chemically pure sodium chloride (the molar ratio of sodium chloride to expanded graphite is 2.9:1), and the particle size of sodium chloride is less than 1 mm;

[0059] 2) Pour sodium chloride and expanded graphite into an alumina ball milling tank with a volume of 1000mL, and put 250g alumina grinding balls (the total volume of grinding balls, sodium chloride and expanded graphite accounts for about 1 / 2 of the volume of the grinding tank) ;

[0060] 3) Install the ball milling tank on the planetary ball mill, and ball mill at a speed of 580 rpm for 8 hours, and pour the ball mill products and grinding balls from the ball milling tank;

[0061] 4) Wash the ball mill tank with distilled water to collect the ball mill products adhering to the wall of the ball mill tank, and rinse with ...

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Abstract

The invention relates to a method for preparing a graphite nano sheet, in particular to a method for preparing a graphite nano sheet by utilizing the high energy ball grinding. The method is characterized in that the method comprises the following steps that: (1) according to the mol ratio of a soluble powder grinding body to expandable graphite of between 1:1 and 8:1, the soluble powder grindingbody and the expandable graphite are weighed up for later use; (2) the soluble powder grinding bodyand the expandable graphite are put in a grinding cylinder, and added with grinding balls according to a ball to material mass ratio of between 2:1 and 10:1, and subjected to ball grinding at the rotary speed of between 350 and 580 rev. / m for 4 to 8h, and the ball grinding products and the grinding balls are taken out of the ball grinding cylinder; (4) the soluble powder grinding body in the ball grinding products obtained from the step(3) is completely dissolved or completely reacted to become soluble salt by using solvents and washed by distilled water for 2 to 6 times, and solids and liquids are separated; and finally, the solids are obtained by separation and dried so as to obtain the graphite nano sheet. The method has the advantages of simple process, low cost, no environmental pollution and the realization of mass industrial production.

Description

Technical field [0001] The invention belongs to the field of nano material preparation, and specifically relates to a preparation method of graphite nano flakes. Background technique [0002] Graphite nano flakes are flakes with a thickness of less than 100 nanometers and a width of micron or sub-micron scale formed by processing natural flake graphite as a raw material. [0003] On the one hand, graphite nanoflake has the excellent chemical stability, thermal conductivity, electrical conductivity, and self-lubricating properties of ordinary graphite, and on the other hand, it has nano-scale effects, so it has potential application prospects in many aspects. For example, when used as a filler to prepare conductive polymer composites, it can significantly reduce the conductivity threshold, thereby reducing the impact on the intrinsic properties of polymer materials; as a lubricant additive, it can greatly improve the carrying capacity and lubricating effect of lubricants; as an elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 宾晓蓓曹天珺陈加藏曹宏
Owner WUHAN UNIV OF TECH
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