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Method for dispersing boron nitride by taking macromolecule as template

A boron nitride and macromolecular technology, applied in the field of dispersing graphite layered structure materials, can solve the problems of high energy consumption and difficult large-scale preparation, and achieve the effects of high transparency, strong gel-forming performance and stable performance

Active Publication Date: 2021-12-31
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently commonly used methods include ball milling, chemical exfoliation, and liquid phase exfoliation, but because the van der Waals force between boron nitride layers is stronger than that of graphite, the traditional method for preparing graphene nanosheets can only obtain a small amount of boron nitride nanosheets. At the same time, there are problems such as large energy consumption, and it is difficult to carry out large-scale preparation in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for dispersing boron nitride with macromolecules as a template, which mainly includes the following steps:

[0032] S1. Measure 150mL deionized water in a 250mL beaker;

[0033] S2. Weigh 1.8g laponite and place it in deionized water, stir to dissolve, and ultrasonically treat for 15min until it disperses into a transparent solution;

[0034] S3. Weigh 4.8g of boron nitride and place it in a transparent solution, stir it evenly and then ultrasonically treat it for 45min to obtain a stable dispersion;

[0035] S4. Add 1.4g hydroxypropyl methylcellulose to the dispersion, first stir at 400r / min for 10min, then adjust the rotating speed to 700r / min and stir for 30min to obtain a uniform gel-state product;

[0036] S5. Put the product in the gel state into an oven, dry it at 80°C for 20 hours, and then coarsely crush the product with a mortar, then put the coarsely crushed product into a bead mill and mix it with steel balls, and vibrate at 400r / min Vibrated at a...

Embodiment 2

[0038] A method for dispersing boron nitride with macromolecules as a template, which mainly includes the following steps:

[0039] S1. Measure 150mL deionized water in a 250mL beaker;

[0040] S2. Weigh 1.8g laponite and place it in deionized water, stir to dissolve, and ultrasonically treat for 15min until it disperses into a transparent solution;

[0041] S3. Weigh 2.4g of boron nitride and place it in a transparent solution, stir it evenly and then ultrasonically treat it for 45min to obtain a stable dispersion;

[0042] S4. Add 1.4g hydroxypropyl methylcellulose to the dispersion, first stir at 400r / min for 10min, then adjust the rotating speed to 700r / min and stir for 30min to obtain a uniform gel-state product;

[0043] S5. Put the product in the gel state into an oven, dry it at 80°C for 20 hours, and then coarsely crush the product with a mortar, then put the coarsely crushed product into a bead mill and mix it with steel balls, and vibrate at 400r / min Vibrated at a...

Embodiment 3

[0045] A method for dispersing boron nitride with macromolecules as a template, which mainly includes the following steps:

[0046] S1. Measure 150mL deionized water in a 250mL beaker;

[0047] S2. Weigh 1.8g laponite and place it in deionized water, stir to dissolve, and ultrasonically treat for 15min until it disperses into a transparent solution;

[0048] S3. Weigh 1.8g of boron nitride and place it in a transparent solution, stir it evenly and then ultrasonically treat it for 40min to obtain a stable dispersion;

[0049] S4. Add 1.4g hydroxypropyl methylcellulose to the dispersion, first stir at 400r / min for 10min, then adjust the rotating speed to 700r / min and stir for 30min to obtain a uniform gel-state product;

[0050] S5. Put the product in the gel state into an oven, dry it at 75°C for 18 hours, and then use a mortar to coarsely crush the product, then put the coarsely crushed product into a bead mill and mix it with steel balls, and vibrate at 400r / min Vibrated at a...

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PUM

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Abstract

The invention relates to a method for dispersing a material with a graphite layered structure, in particular to a method for dispersing boron nitride by taking a macromolecule as a template. The method for dispersing the boron nitride by taking the macromolecule as the templatecomprises the following steps of: S1, respectively weighing hydroxypropyl methyl cellulose, hectorite powder and boron nitride powder according to the mass ratio of hydroxypropyl methyl cellulose to hectorite to boron nitride of 7: 9: 24-7: 9: 6 for later use; S2, adding deionized water into the hectorite powder, and carrying out ultrasonic treatment for 10-15 minutes until the hectorite powder is dispersed into a transparent solution; S3, taking the boron nitride powder, and placing the boron nitride powder in the transparent solution, performing ultrasonic treatment for 35-45 min after uniform stirring, and obtaining stable dispersion liquid; S4, adding the hydroxypropyl methyl cellulose into the dispersion liquid, and stirring to obtain a uniform gel-state product; and S5, drying the gel-state product, and crushing theproduct to obtain the dispersed boron nitride.

Description

technical field [0001] The invention relates to a method for dispersing materials with a graphite layer structure, in particular to a method for dispersing boron nitride with macromolecules as templates. Background technique [0002] With the rapid development of electronic technology, electronic products are becoming more and more miniaturized. Under high-frequency operating conditions, electronic devices will quickly generate a large amount of heat, causing the equipment to overheat. Thereby reducing its reliability and even causing permanent damage to the equipment. Therefore, the packaging materials of electronic devices are required to have good thermal conductivity, which can quickly dissipate the heat generated by the current. Polymer-based thermally conductive composite materials are low in cost and excellent in performance, especially polymer-based composite materials with hexagonal boron nitride as thermally conductive fillers have high thermal conductivity, good...

Claims

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Application Information

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IPC IPC(8): C09K5/10
CPCC09K5/10
Inventor 李栋杨俊伟辛浩宇罗文君
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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