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Preparation method of hollow hexagonal boron nitride microsphere

A technology of hexagonal boron nitride and hollow microspheres, applied in the field of materials science, can solve the problems of long holding time and agglomeration of hollow spheres, and achieve the effects of short holding time, difficult to agglomerate, and controllable sphere diameter

Inactive Publication Date: 2012-06-27
SHENYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, it needs to be pressed into blocks under high pressure, which will easily lead to the agglomeration of hollow spheres, and the required holding time is too long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A preparation method of hexagonal boron nitride hollow microspheres is:

[0016] 1. Ingredients: 5 grams of boric acid, 25 grams of borax, 20 grams of urea, 2.5 grams of dodecyltrimethylammonium chloride and 5.5 grams of network agent were weighed using an electronic balance. Among them, 4.263 grams of acrylamide, 0.17 grams of N,N-methylene acrylamide, and 1.067 grams of ammonium persulfate were set aside.

[0017] 2. Adding soft templates to prepare hexagonal boron nitride precursor gels: Dodecyltrimethylammonium chloride was added as a soft template during the experiment. According to the above ingredients, first dissolve dodecyltrimethylammonium chloride in deionized water, then add boric acid, borax and urea, place the above mixed solution in a constant temperature water bath at 75 degrees Celsius and stir thoroughly, then add acrylamide, N,N-methylenebisacrylamide and ammonium persulfate, continue stirring to obtain a precursor gel.

[0018] 3. Preparing the ...

Embodiment 2

[0022] A preparation method of hexagonal boron nitride hollow microspheres is:

[0023] 1. Ingredients: 10 grams of boric acid, 50 grams of borax, 40 grams of urea, 5 grams of dodecyltrimethylammonium chloride and 10 grams of network agent were weighed using an electronic balance. Among them, 7.75 grams of acrylamide, 0.31 grams of N,N-methylene acrylamide, and 1.94 grams of ammonium persulfate were set aside.

[0024] 2. Adding soft templates to prepare hexagonal boron nitride precursor gels: Dodecyltrimethylammonium chloride was added as a soft template during the experiment. According to the above ingredients, first dissolve dodecyltrimethylammonium chloride in deionized water, then add boric acid, borax and urea 。 Place the above mixed solution in a constant temperature water bath at 65 degrees Celsius and stir thoroughly, then add acrylamide, N,N-methylenebisacrylamide and ammonium persulfate in sequence, and continue stirring to obtain a precursor gel.

[0025] 3. P...

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PUM

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Abstract

The invention relates to a preparation method of a hollow hexagonal boron nitride microsphere, which comprises the following steps: 1, preparing raw materials: the raw materials comprise boric acid, borax, urea, dodecyl trimethyl ammonium chloride and a networking agent, wherein the mass percentage of the boric acid is 3-10 percent, the mass percentage of the borax is 37-45 percent, the mass percentage of the urea is 50-30 percent, the mass percentage of the dodecyl trimethyl ammonium chloride is 2-5 percent, and the mass percentage of the networking agent is 8-10 percent; 2, adding a soft template to prepare hexagonal boron nitride precursor gel; 3, preparing precursor powder; 4, synthesizing hexagonal boron nitride powder; and 5, removing impurities. No pressing is needed to form blocks under high pressure, agglomeration cannot be caused easily, the insulation time is short, and the method is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a preparation method of boron nitride hollow microspheres in the field of materials science, which belongs to the Department of Chemistry, the Division of Organic Chemistry, non-metallic elements and their compounds according to the International Classification (IPC). Background technique [0002] Hollow nanospheres are a kind of core-shell particles with a special structure whose core is air or other gases. As a new nanostructure, it has attracted widespread attention. Hollow microspheres are evolved from core / shell composite structure materials. The properties can be adjusted by adjusting the structure, size and composition of heterogeneous core / shell composite particles, so as to achieve its optical, thermal, electrical, magnetic and catalytic properties. Large scale cropping of nature. Due to the characteristics of low density and high specific surface of this type of material, and its hollow part can accommodate a large n...

Claims

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Application Information

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IPC IPC(8): C01B21/064B82Y40/00
Inventor 张宁崔行宇周永辉阚洪敏王晓阳
Owner SHENYANG UNIV
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