Preparation methods of graphite-phase boron nitride nano wafer and colloid thereof

A graphitic boron nitride, nanotechnology, applied in chemical instruments and methods, nitrogen compounds, nanotechnology, etc., can solve problems such as difficulty in large-scale preparation and production cost, and achieve the advantages of large-scale industrial production, simple preparation process, The effect of low environmental pollution

Inactive Publication Date: 2015-04-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that high-concentration non-surface-modified graphite phase boron nitride dispersion system is difficult to prepare in large quantities and reduce production costs. It provides a preparation method of graphite phase boron nitride nano-discs and colloids. The graphite-phase boron nitride nano-disc powder with uniform size is dissolved in water through the Brownian motion of the solvent without adding other surface modifiers, and the graphite-phase boron nitride with high concentration, good stability and easy storage is prepared Nanodisc colloid

Method used

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  • Preparation methods of graphite-phase boron nitride nano wafer and colloid thereof
  • Preparation methods of graphite-phase boron nitride nano wafer and colloid thereof
  • Preparation methods of graphite-phase boron nitride nano wafer and colloid thereof

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preparation example Construction

[0017] The preparation steps of the present invention are as follows:

[0018] B with a mass ratio of 100:600:9 2 o 3 , CO(NH 2 ) 2 Mix it with copper nitrate and grind it into powder; take the mixed sample in a corundum magnetic boat, put it in a horizontal high-temperature tube furnace, and raise the temperature at a rate of 5-10°C / min to Keep at 1250°C for another 4-8 hours; take out the samples, wash them with deionized water, absolute ethanol, and 1mol / L dilute nitric acid, filter them with suction, soak them, and filter them with suction. After repeated several times, a milky white colloid is obtained. (Its crystal structure, infrared spectrum are respectively as figure 1 , 2 As shown, its morphology is as image 3 , 4 , 5 shown). The colloid concentration can reach 20 mg / mL.

Embodiment 1

[0020] B with a mass ratio of 100:600:9 2 o 3 , CO(NH 2 ) 2 Mix with copper nitrate and grind into powder; take the mixed sample in a corundum magnetic boat, then place it in a horizontal high-temperature tube furnace, and raise the temperature to 1250°C at a rate of 10°C / min under the protection of an ammonia atmosphere Keep it for another 4 hours; take out the samples and wash them with deionized water, absolute ethanol, and 1mol / L dilute nitric acid respectively, filter them with suction, soak them, and filter them with suction.

Embodiment 2

[0022] B with a mass ratio of 100:600:9 2 o 3 , CO(NH 2 ) 2 Mix with copper nitrate and grind into powder; take the mixed sample in a corundum magnetic boat, then place it in a horizontal high-temperature tube furnace, and raise the temperature to 1250°C at a rate of 8°C / min under the protection of an ammonia atmosphere Keep it for another 6 h; take out the samples and wash them with deionized water, absolute ethanol, and 1mol / L dilute nitric acid respectively, filter them with suction, soak them, and filter them with suction. After repeated several times, a milky white colloid is obtained.

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Abstract

The invention discloses preparation methods of a graphite-phase boron nitride nano wafer and a colloid thereof, and belongs to the technical field of material preparation. The graphite-phase boron nitride nano wafer is synthesized conventionally at a high temperature, and other surface modifiers are not needed, so that an ultra-high-concentration graphite-phase boron nitride nano wafer colloid can be prepared, and can be further diluted according to practical needs. By adopting the preparation methods disclosed by the invention, the problems that graphite-phase boron nitride cannot be prepared into a high-concentration stable water-phase colloid, the preparation condition is relatively harsh and the cost is relatively high at present are solved, and the preparation methods are simple, low-price and easily-available in raw materials, low in environmental pollution and beneficial for large-scale industrial production, and have significant economical and social benefits.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing graphite-phase boron nitride nano-discs and colloids thereof. Background technique [0002] Boron nitride is a synthetic substance with excellent physical and chemical properties, such as high hardness, high melting point, high chemical stability, high thermal conductivity, low density, and oxidation and corrosion resistance. Among the various structures of boron nitride, graphite-phase boron nitride is a very good high-temperature solid lubricant, thermally conductive material, heat-resistant material and catalyst carrier because of its structure is very similar to graphite. At present, graphite-phase boron nitride is generally a massive powder with high crystallinity. Although its nano-phase can be obtained by exfoliation technology to obtain two-dimensional nano-sheets, its size and shape are irregular and inhomogeneous. In addi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B21/064B82Y30/00B82Y40/00
Inventor 黄彩进刘秋文
Owner FUZHOU UNIV
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