Alkali lignin carbon nanometer microsphere as well as preparation method and application thereof

A technology of carbon nanospheres and alkali lignin, which is applied in the direction of nanotechnology, can solve the problems that carbon materials are difficult to maintain shape, nanostructures are easily damaged, and the cost is high, and achieve good practical application value, good microscopic appearance, and improved The effect of using performance

Inactive Publication Date: 2016-08-03
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

The most used carbon fiber material is polyacrylonitrile-based carbon fiber, but this carbon fiber is a petrochemical fiber, which has the problems of non-renewability, poor environmental protection and high cost
However, the use of single lignin to prepare carbon fiber materials has the problem of low fiber strength. The preparation of carbon materials by combining lignin and synthetic polymers is one of the main methods used by researchers.
At present, there are

Method used

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  • Alkali lignin carbon nanometer microsphere as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Example Embodiment

[0024] Example 1

[0025] (1) Weighing commercial alkali lignin, using N,N-dimethylformamide as a solvent, configured as an alkali lignin electrostatic spray solution with a mass fraction of 35%;

[0026] (2) the alkali lignin electrostatic spray solution of step (1) is transferred in the equipment of electrostatic spray, is 25kv at static voltage, and receiving distance is 15cm, carries out electrostatic spray under the condition that the propulsion speed of electrostatic spray solution is 3ml / h , to obtain alkali lignin nano-microspheres;

[0027] (3) The alkali lignin nanospheres are placed in a tube furnace, and the alkali lignin nanospheres are preoxidized at a preoxidation temperature of 250°C. The preoxidation is carried out in air, and the heating rate is 0.2°C / min , the pre-oxidation time is 2h;

[0028] (4) Carry out carbonization treatment on the pre-oxidized alkali lignin nano-microspheres, the carbonization temperature is 400°C, the carbonization treatment is ca...

Example Embodiment

[0030] Example 2

[0031] (1) Weighing commercial alkali lignin, using N,N-dimethylformamide as a solvent, configured as an alkali lignin electrostatic spray solution with a mass fraction of 45%;

[0032] (2) the alkali lignin electrostatic spray solution of step (1) is transferred in the equipment of electrostatic spray, is 15kv at static voltage, and receiving distance is 15cm, carries out electrostatic spray under the condition that the propulsion speed of electrostatic spray solution is 3ml / h , to obtain alkali lignin nano-microspheres;

[0033] (3) The alkali lignin nanospheres are placed in a tube furnace, and the alkali lignin nanospheres are preoxidized at a preoxidation temperature of 280°C. The preoxidation is carried out in air, and the heating rate is 0.5°C / min , the pre-oxidation time is 2h;

[0034] (4) Carry out carbonization treatment on the pre-oxidized alkali lignin nano-microspheres, the carbonization temperature is 400°C, the carbonization treatment is ca...

Example Embodiment

[0035] Example 3

[0036] (1) Weigh commercial alkali lignin, use glacial acetic acid as a solvent, and configure it as an alkali lignin electrostatic spray solution with a mass fraction of 25%;

[0037] (2) the alkali lignin electrostatic spray solution of step (1) is transferred in the equipment of electrostatic spray, is 15kv at static voltage, and receiving distance is 10cm, carries out electrostatic spray under the condition that the propulsion speed of electrostatic spray solution is 2ml / h , to obtain alkali lignin nano-microspheres;

[0038] (3) The alkali lignin nanospheres are placed in a tube furnace, and the alkali lignin nanospheres are preoxidized at a preoxidation temperature of 280°C. The preoxidation is carried out in air, and the heating rate is 0.2°C / min , the pre-oxidation time is 2h;

[0039] (4) Carry out carbonization treatment on the pre-oxidized alkali lignin nano-microspheres, the carbonization temperature is 600°C, the carbonization treatment is car...

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Abstract

The invention belongs to the technical field of carbon nanometer materials, and discloses an alkali lignin carbon nanometer sphere, a preparation method and an application thereof. The preparation method is as follows: using N, N-dimethylformamide or glacial acetic acid as a solvent, configuring an alkali lignin electrostatic spray solution with a mass fraction of 20% to 50%, and then transferring it to an electrostatic spraying device , the alkali lignin nanospheres are obtained by electrostatic spraying, and then the alkali lignin nanospheres are pre-oxidized at a temperature of 250-280°C, and finally carbonized at a temperature of 400-900°C to obtain alkali lignin carbon nanospheres. The invention uses low-cost, renewable and degradable commercial alkali lignin as a carbon source, and has the advantages of energy saving and environmental protection. The obtained alkali lignin carbon nano-microspheres have good microscopic appearance and good dispersion performance, which improves the use performance of the lignin carbon material.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials, and in particular relates to an alkali lignin carbon nanosphere and its preparation method and application. Background technique [0002] With the increasing energy and environmental problems, how to make more effective and full use of natural, renewable and environmentally friendly biomass resources has received widespread attention from the society. [0003] As one of the most widely existing resources in nature, lignin is the second largest amorphous polyphenolic polymer in the plant kingdom after cellulose. It is a renewable, green and environmentally friendly natural polymer material. As a by-product of the paper industry, commercial lignin exists in the paper black liquor and is rarely further processed and utilized, resulting in waste of resources and even environmental problems. Carbon materials exhibit excellent properties in terms of hardness, optical properties, heat res...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y40/00
CPCC01P2004/03C01P2004/32
Inventor 彭新文周子丹钟林新吴锡鹏罗元超孙润仓
Owner SOUTH CHINA UNIV OF TECH
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