A kind of boron carbon nitrogen nano paper and preparation method thereof

A boron carbon nitrogen nanometer and boron carbon nitrogen technology, which is applied in the field of boron carbon nitrogen nano paper and its preparation, can solve the problems of high molecular weight and structural requirements of precursors, and achieve good operability, high specific surface area and low cost. Effect

Active Publication Date: 2017-01-04
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This requires high molecular weight and structure of the precursor, and the resulting fibers are usually micron-sized, which has certain limitations

Method used

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  • A kind of boron carbon nitrogen nano paper and preparation method thereof
  • A kind of boron carbon nitrogen nano paper and preparation method thereof
  • A kind of boron carbon nitrogen nano paper and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A boron carbon nitrogen nano paper of the present invention is composed of boron carbon nitrogen nano fibers interwoven into a network structure. The chemical composition of the boron carbon nitrogen nano paper is: B 0.82 C 5 N 1.35 . The diameter of the boron carbon nitrogen nanofiber is 100nm-300nm.

[0031] A preparation method of the above-mentioned boron carbon nitrogen nano paper of the present embodiment, comprising the following steps:

[0032] (1) Polyacrylonitrile (PAN) was dissolved in N-N-dimethylformamide (DMF) to prepare a precursor solution with a mass concentration of PAN of 12wt%.

[0033] (2) Add boric acid to the precursor solution obtained in step (1), the mass ratio of boric acid to polyacrylonitrile is 1:5, stir and dissolve to obtain a spinning solution.

[0034] (3) The spinning solution obtained in step (2) is placed in an electrospinning device, and under the action of an electrostatic field of 15kV, the boron carbon nitrogen nanofibrils o...

Embodiment 2

[0038] A boron carbon nitrogen nano paper of the present invention is composed of boron carbon nitrogen nano fibers interwoven into a network structure. The chemical composition of the boron carbon nitrogen nano paper is: B 0.61 C 5 N 0.67 . The diameter of the boron carbon nitrogen nanofiber is 150nm-500nm.

[0039] The preparation method of boron carbon nitrogen nanopaper in this example is basically the same as that in Example 1, the only difference being that the mass concentration of PAN in the precursor solution obtained in step (1) is 10%.

Embodiment 3

[0041] A boron carbon nitrogen nano paper of the present invention is composed of boron carbon nitrogen nano fibers interwoven into a network structure. The chemical composition of the boron carbon nitrogen nano paper is: B 0.90 C 5 N 0.90. The diameter of the boron carbon nitrogen nanofiber is 150nm-500nm.

[0042] The preparation method of boron carbon nitrogen nanopaper in this example is basically the same as that in Example 1, the only difference being that the mass concentration of PAN in the precursor solution obtained in step (1) is 13%.

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Abstract

The invention discloses a boron carbon nitrogen nano paper and a preparation method thereof. The boron carbon nitrogen nano paper is composed of boron carbon nitrogen nano fibers interwoven into a network structure, and its chemical composition is BxC5Ny, where x=0.1~ 3.0, y=0.1~2.5. The preparation method includes (1) preparing a precursor solution; (2) preparing a spinning solution; (3) electrospinning the spinning solution to obtain boron carbon nitrogen nano fibrils; (4) preparing boron carbon nitrogen nano fibrils Form boron-carbon-nitrogen nano-crosslinked fibers; (5) Warm up boron-carbon-nitrogen nano-crosslinked fibers to 350°C-500°C under nitrogen protection, and then heat up to 800°C in ammonia / nitrogen mixed atmosphere or ammonia atmosphere ~1000°C, boron carbon nitrogen nano paper is obtained. The composition of the boron carbon nitrogen nanometer paper is adjustable, easy to operate, simple in preparation method, low in cost, and adjustable in chemical composition of the product.

Description

technical field [0001] The invention belongs to the field of functional materials, and in particular relates to a boron carbon nitrogen nano paper and a preparation method thereof. Background technique [0002] The upsurge of research on boron-carbon-nitrogen (BCN) ternary system originated from the theoretical prediction of new superhard materials by Liu and Cohen in 1989 [Prediction of new low compressibility solids, Science, 245: 841-845(1989)]. Since the BCN compound has a hexagonal structure similar to that of graphite and h-BN, by adjusting its chemical composition and atomic environment, a new type of semiconductor material with continuously adjustable energy bandgap from semi-metal to insulator can be obtained [Binary and ternary atomic layers built from carbon, boron, and nitrogen, Adv. Mater, 3: 1-18 (2012)]. [0003] The synthesis methods of BCN compounds reported in the literature can be mainly summarized as solid-phase nitriding method, solid-phase pyrolysis me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/10D01F11/00D06M11/60D01D5/00
Inventor 胡天娇楚增勇蒋振华李义和李公义赵赛花阳斯琴李效东
Owner NAT UNIV OF DEFENSE TECH
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