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Two-dimensional fiber/boron nitride nanotube multistage reinforcement and preparation method thereof

A technology of boron nitride nanotubes and reinforcements, applied in the field of composite material preparation, to achieve the effects of easy availability, low raw material cost, and simple preparation process

Active Publication Date: 2015-09-16
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on introducing boron nitride nanotubes into composite materials is still in its infancy, and there is no public patent on the preparation method of fiber / boron nitride nanotube multi-level reinforcement in China

Method used

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  • Two-dimensional fiber/boron nitride nanotube multistage reinforcement and preparation method thereof
  • Two-dimensional fiber/boron nitride nanotube multistage reinforcement and preparation method thereof
  • Two-dimensional fiber/boron nitride nanotube multistage reinforcement and preparation method thereof

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preparation example Construction

[0026] The preparation method of multi-stage reinforcing body of the present invention, concrete steps are as follows:

[0027] 1) Iron ball mill jar and iron ball mill:

[0028] ①According to the mass ratio of ball to material 1-150:1, put the boron source precursor powder and iron balls in the iron ball mill tank, add non-aqueous solvent as the ball mill medium, or pass in NH3 for ball mill without adding liquid medium Protection, ball milling at 150-440rpm for 24-150h;

[0029] ② Add the ball-milled precursor to the same non-aqueous solvent as the ball-milling medium (if no liquid ball-milling medium is added during ball-milling, just add a non-aqueous solvent directly) to make a slurry, cut the two-dimensional fiber fabric, Put it into the above-mentioned slurry for immersion, and perform ultrasonication for 1 hour during the immersion process to ensure good suspension of the slurry. The impregnated two-dimensional fiber fabric was put into a drying oven and dried at 85 ...

Embodiment 1

[0063] Put boron powder and stainless steel balls in a stainless steel ball mill tank according to the mass ratio of the ball to material 20:1, add ethanol as the ball mill medium, and mill at a speed of 400rpm for 80h. Add appropriate amount of ethanol to the ball-milled precursor to make a slurry, cut a small piece of two-dimensional carbon fiber fabric, put it into the above slurry for impregnation, and perform ultrasonication for 1 hour during the impregnation process to ensure good suspension of the slurry. Then the impregnated two-dimensional carbon fiber fabric was put into a drying oven and dried at 85 °C for 1 h. Finally, the impregnated and dried two-dimensional carbon fiber fabric was put into a high-pressure nitriding furnace, and high-purity nitrogen was introduced until the pressure in the high-pressure furnace reached 2MPa, and the temperature of the high-pressure furnace was raised to the growth temperature of boron nitride nanotubes at 1400°C, and kept warm. 2...

Embodiment 2

[0065] When the precursor powder is ball milled, no liquid ball milling medium is added, and only NH3 is passed in for protection. Others are the same as in Example 1. As a result, a two-dimensional fiber / boron nitride nanotube multi-level reinforcement is obtained.

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Abstract

The invention relates to a two-dimensional fiber / boron nitride nanotube multistage reinforcement and a preparation method thereof. In the two-dimensional fiber / boron nitride nanotube multistage reinforcement, boron nitride nanotubes are uniformly distributed on the surface of two-dimensional fibers. The preparation method for the two-dimensional fiber / boron nitride nanotube multistage reinforcement is innovatively explored for the first time, and the desired two-dimensional fiber / boron nitride nanotube multistage reinforcement is prepared. The preparation method is simple; raw materials for the reinforcement are cheap, safe and easily available; and a foundation is laid for subsequent construction of a three-dimensional fiber / boron nitride nanotube multistage reinforcement and research and development of a multistage reinforced composite.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a two-dimensional fiber / boron nitride nanotube multilevel reinforcement and a preparation process thereof. Background technique [0002] Since Rubio et al. theoretically predicted the existence of boron nitride nanotubes by tight-binding molecular dynamics in 1994, and in 1995, Chorpa et al. successfully prepared them for the first time by arc discharge method. Boron nitride nanotubes have been It has become another research hotspot of new nanomaterials after carbon nanotubes. The structure of boron nitride nanotubes is similar to that of carbon nanotubes. It can be regarded as a nanotube material in which B and N atoms are replaced by C atoms, and has excellent mechanical properties similar to those of carbon nanotubes. Its tensile modulus is as high as 1.2 TPa. The theoretical prediction of the thermal conductivity of boron nitride nanotubes...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/583C04B35/622
Inventor 董绍明朱广祥阚艳梅王震张翔宇何平高乐
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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