Two-dimensional thin film material coated on microsphere surfaces and simple method for stripping two-dimensional thin film material

A technology of two-dimensional materials and thin-layer materials, which is applied in the preparation of microspheres, chemical instruments and methods, and microcapsule preparations. Synapse, complete crystal structure, good product quality effect

Active Publication Date: 2017-10-03
西安一九零八新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the tape method and the three-roller grinding and stripping method are simple in process, the thickness of the product is not easy to control; the plasma etching method and the slight friction method have high product quality, but the output is very small and the process is complicated and high in cost; the fluid stripping method has fast response and low cost , but requires a special reaction vessel, and the reaction conditions are re

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  • Two-dimensional thin film material coated on microsphere surfaces and simple method for stripping two-dimensional thin film material
  • Two-dimensional thin film material coated on microsphere surfaces and simple method for stripping two-dimensional thin film material
  • Two-dimensional thin film material coated on microsphere surfaces and simple method for stripping two-dimensional thin film material

Examples

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Example Embodiment

[0053] The method for preparing a core-shell structure of graphene coated alumina particles provided by the present invention includes the following steps:

[0054] a) Put the graphite ball into a beaker containing dilute hydrochloric acid; the size of the graphite ball is between 5mm and 15mm, preferably between 8mm and 10mm. It is processed from high-pressure graphite with a purity of 99.99%. No polishing, no surface treatment; the concentration of hydrochloric acid is between 1:6 and 1:1; ultrasonic cleaning at room temperature, the ultrasonic power is between 30W and 60W, the cycle is between 10 and 20min, replace the new solution and repeat the above step 3. Once to 10 times, until the cleaning solution no longer becomes turbid; remove the tiny graphite debris on the surface of the graphite ball to make the surface smooth;

[0055] b) Mix the graphite balls and alumina particles in proportion, the mass ratio of graphite balls to alumina is between 1:2 and 2:1, preferably the m...

Example Embodiment

[0062] Example 1:

[0063] a) Take ten graphite balls, the diameter of the graphite balls is 10mm, and the total mass is 10g; put them into a beaker containing dilute hydrochloric acid, the concentration of hydrochloric acid is 1:6; ultrasonic cleaning at room temperature, the ultrasonic power is 45W, cycle 15min, replace the solution with a new solution and repeat the above steps 5 times until the cleaning solution no longer becomes turbid; remove the tiny graphite debris on the surface of the graphite ball to make the surface smooth;

[0064] b) Mix the graphite balls and alumina particles at a mass ratio of 1:1, and weigh 10g of alumina particles; the size of the alumina particles is between 200μm and 300μm;

[0065] c) Put the mixture A into a 50ml agate ball mill tank, the total volume of graphite balls and alumina is one-fourth of the total volume; mix it with a ball mill in an air atmosphere at a speed of 500 rpm for 2.5 hours to obtain a mixture B ;

[0066] d) Filter out the...

Example Embodiment

[0067] Example 2:

[0068] a) Weigh 5g of the alumina particles uniformly coated with graphene obtained in Example 1, and put them into a 30ml reagent bottle;

[0069] b) Add 20ml of 1,2-dichloroethane to the reagent bottle and ultrasonic; the ultrasonic power is 45W for 5 minutes; all the graphene on the surface of the alumina particles is transferred to the solution;

[0070] c) Use a 100 mesh filter to separate the alumina particles from the liquid to obtain a graphene dispersion.

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Abstract

The invention discloses a simple method for performing coating modification on microsphere surfaces by using a two-dimensional material thin film, a simple method for stripping the two-dimensional material, and products formed by coating and stripping. In the coating process, no solvent is used, a physical friction transfer method is adopted to transfer a lamellar compound thin film from the surface of a lamellar compound sphere to the surface of the microsphere, and screening is performed to obtain the coated product by utilizing the size difference between the product (coated microsphere) and the lamellar compound sphere. The whole process has the advantages of simple technique, low cost, high efficiency and high product purity, and is suitable for industrial production. In addition, the lamellar compound can be transferred from the microsphere surface into the solution by simple ultrasonic treatment in the solution; and thus, the invention provides a simple non-chemical method for stripping the lamellar compound, which is suitable for industrial production.

Description

technical field [0001] The invention relates to a new method for coating modification of microspheres and stripping two-dimensional materials, and belongs to the technical field of new energy materials and their preparation. Background technique [0002] Oxide microspheres such as alumina are a common material with both insulation and thermal conductivity properties. It is often used as a filler additive. For example, it can not only be used in insulating rubber to improve the mechanical strength of rubber, but also in ceramics, Insulation and heat conduction fillers, strengthened glass fillers, surface protection coatings, optical materials, catalyst carriers, and many other uses. Aluminum oxide, however, is not electrically conductive. Graphene has the characteristics of extremely high electron carrying rate, high electrical conductivity, high thermal conductivity, and high strength. Researchers naturally thought of coating thin layers of graphene on alumina particles to...

Claims

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Application Information

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IPC IPC(8): C01F7/02C01B32/19B01J13/02B01J13/22
CPCB01J13/02B01J13/22C01B2204/04C01F7/021C01P2004/03C01P2004/04C01P2004/60C01P2004/80
Inventor 张锦英黄家良牛春明李俊季欣李智辉
Owner 西安一九零八新能源科技有限公司
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