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Surface modified nanometer diamond particle as well as preparation method and application thereof

A nano-diamond, surface modification technology, applied in the field of nano-diamond, to achieve the effect of sufficient modification, uniform distribution of OH bonds, and simple and easy preparation method

Inactive Publication Date: 2012-05-02
GUANGZHOU DEPOSON ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of nano-diamond particles is still in its infancy, and currently it mainly focuses on the application of mechanical properties, such as used as a raw material for polishing fluid, surface coating of wear-resistant parts, toughening filler particles, etc.

Method used

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  • Surface modified nanometer diamond particle as well as preparation method and application thereof
  • Surface modified nanometer diamond particle as well as preparation method and application thereof
  • Surface modified nanometer diamond particle as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 Shown, the preparation method of the surface-modified nano-diamond particle of the present embodiment, comprises the following steps:

[0039] (1) cleaning the nano-diamond particles, specifically comprising the following steps:

[0040] (1-1) get average particle size and be 1 gram of nano-diamond particle of 150nm, remove metal impurity and remove graphite impurity;

[0041] Wherein removing metal impurities specifically comprises the following steps:

[0042] Nano-diamond particles are placed in a mixed solution of hydrochloric acid and nitric acid, and heated at 100°C for 1 hour to remove metal impurities in the nano-diamond; wherein the mixed solution of hydrochloric acid and nitric acid is composed of 37% hydrochloric acid and 68% nitric acid. 3:1 volume ratio composition.

[0043] Wherein removing graphite impurity specifically comprises the following steps:

[0044] Place the nano-diamond particles in a mixture of sulfuric acid and nitric ac...

Embodiment 2

[0055] The preparation method of the surface-modified nano-diamond particle of the present embodiment, comprises the following steps:

[0056] (1) cleaning the nano-diamond particles, specifically comprising the following steps:

[0057] (1-1) Get 1 gram of nano-diamond particles with an average particle diameter of about 50nm, remove metal impurities and remove graphite impurities;

[0058] Wherein removing metal impurities specifically comprises the following steps:

[0059] Nano-diamond particles are placed in a mixed solution of hydrochloric acid and nitric acid, and heated at 150°C for 3 hours to remove metal impurities in the nano-diamond; wherein the mixed solution of hydrochloric acid and nitric acid is composed of 37% hydrochloric acid and 68% nitric acid. 1:1 volume ratio composition.

[0060] Wherein removing graphite impurity specifically comprises the following steps:

[0061] Place the nano-diamond particles in a mixture of sulfuric acid and nitric acid, and h...

Embodiment 3

[0068] The preparation method of the surface-modified nano-diamond particle of the present embodiment, comprises the following steps:

[0069] (1) cleaning the nano-diamond particles, specifically comprising the following steps:

[0070] (1-1) get average particle diameter and be 1 gram of nano-diamond particle of 5nm, remove metal impurity and remove graphite impurity;

[0071] Wherein removing metal impurities specifically comprises the following steps:

[0072] Nano-diamond particles are placed in a mixed solution of hydrochloric acid and nitric acid, and heated at 120°C for 2 hours to remove metal impurities in the nano-diamond; wherein the mixed solution of hydrochloric acid and nitric acid is composed of 37% hydrochloric acid and 68% nitric acid. 2:1 volume ratio composition.

[0073] Wherein removing graphite impurity specifically comprises the following steps:

[0074] Place the nano-diamond particles in a mixture of sulfuric acid and nitric acid, and heat them at 2...

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Abstract

The invention discloses a preparation method of surface modified nanometer diamond particles, which comprises the following steps that: (1) nanometer diamond particles are cleaned; (2) the nanometer diamond particles treated in the first step are subjected to surface hydrogenation treatment so that C-H bonds are formed on the surfaces of the nanometer diamond particles; and (3) the surface chemical modification is carried out, the nanometer diamond particles obtained in the second step are placed into a hydrogen peroxide concentration with the concentration being 20 percent to 50 percent to be soaked for 2 to 5 hours, simultaneously, the ultraviolet light irradiation is adopted, and OH bonds are formed on the surfaces of the nanometer diamond particles. The invention also discloses the surface modified nanometer diamond particles prepared by the method and an application of the surface modified nanometer diamond particles. Compared with the prior art, the surface modified nanometer diamond particles prepared by the method have the advantages that the particles are sensitive to the humidity, in addition, the preparation method is simple and is easy to implement, and wide application can be realized in the humidity monitoring field and the biological modification field.

Description

technical field [0001] The invention relates to nano-diamond technology, in particular to a surface-modified nano-diamond particle and its preparation method and application. Background technique [0002] Diamond, also known as diamond, has the highest hardness, the largest Young's modulus, the fastest longitudinal wave velocity, the widest transparent range, and the highest thermal conductivity in nature. It is a new type of functional material integrating various excellent properties. "Diamonds are forever, one piece will last forever" describes that diamond materials have excellent chemical stability and corrosion resistance, so they are extremely suitable for use in harsh chemical environments. [0003] Nano-diamond particles are a new member of diamond materials. It not only has the inherent comprehensive excellent properties of bulk diamonds, but also has unique properties such as large specific surface area, large number of surface atoms, high surface energy, and high...

Claims

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Application Information

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IPC IPC(8): C01B31/06B82Y40/00C12Q1/68G01N27/00
Inventor 张文英钟建华
Owner GUANGZHOU DEPOSON ELECTRIC TECH
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