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Magnetic carbon nano-microsphere taking lignin as carbon source and preparation method of magnetic carbon nano-microsphere

A nano-microsphere and lignin technology, which is applied in the fields of inorganic material magnetism, inductance/transformer/magnet manufacturing, electrical components, etc., can solve the problems of carbon nanospheres being difficult to maintain microscopic morphology, limited in use, etc., and achieve low preparation costs. , The effect of improving performance and good practical application value

Active Publication Date: 2016-12-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few researches on the preparation of magnetic carbon nanospheres using pure lignin as a carbon source at home and abroad. The main problem is that the preparation of carbon nanospheres from lignin is difficult to maintain its microscopic shape, which limits its further use.

Method used

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  • Magnetic carbon nano-microsphere taking lignin as carbon source and preparation method of magnetic carbon nano-microsphere
  • Magnetic carbon nano-microsphere taking lignin as carbon source and preparation method of magnetic carbon nano-microsphere
  • Magnetic carbon nano-microsphere taking lignin as carbon source and preparation method of magnetic carbon nano-microsphere

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Weigh commercial lignin and iron acetylacetonate, use N,N-dimethylformamide as solvent, configure lignin electrostatic spray solution containing iron acetylacetonate with lignin mass fraction of 35% (wherein acetylacetonate Iron content is 10% of lignin, w / w);

[0028] (2) the lignin electrostatic spray solution containing iron acetylacetonate of step (1) is transferred in the equipment of electrostatic spray, at static voltage is 25kv, and receiving distance is 15cm, and the advancing speed of electrostatic spray solution is the condition of 3ml / h Electrostatic spraying was carried out to obtain lignin nanospheres containing iron acetylacetonate;

[0029] (3) The obtained lignin nanospheres containing iron acetylacetonate are placed in a tube furnace, and the lignin nanospheres are preoxidized at a preoxidation temperature of 250° C. The preoxidation is carried out in air, and the temperature rises The rate is 0.2°C / min, and the pre-oxidation time is 3h;

[0030]...

Embodiment 2

[0033] (1) Weigh commercial lignin and iron acetylacetonate, use N,N-dimethylformamide as solvent, configure lignin electrostatic spray solution containing iron acetylacetonate with lignin mass fraction of 45% (wherein acetylacetonate Iron content is 30% of lignin, w / w);

[0034] (2) the lignin electrostatic spray solution containing iron acetylacetonate of step (1) is transferred in the equipment of electrostatic spray, at static voltage is 15kv, and receiving distance is 15cm, and the advancing speed of electrostatic spray solution is the condition of 3ml / h Electrostatic spraying was carried out to obtain lignin nanospheres containing iron acetylacetonate;

[0035] (3) The obtained lignin nanospheres containing iron acetylacetonate are placed in a tube furnace, and the lignin nanospheres are preoxidized at a preoxidation temperature of 280° C. The preoxidation is carried out in air, and the temperature rises The rate is 0.5°C / min, and the pre-oxidation time is 6h;

[0036]...

Embodiment 3

[0038] (1) Weigh commercial lignin and iron acetylacetonate, use N,N-dimethylformamide as solvent, configure lignin electrostatic spray solution containing iron acetylacetonate with lignin mass fraction of 35% (wherein acetylacetonate Iron content is 20% of lignin, w / w);

[0039] (2) the lignin electrostatic spray solution containing iron acetylacetonate of step (1) is transferred in the equipment of electrostatic spray, at static voltage is 15kv, and receiving distance is 10cm, and the advancing speed of electrostatic spray solution is the condition of 2ml / h Electrostatic spraying was carried out to obtain lignin nanospheres containing iron acetylacetonate;

[0040] (3) The obtained lignin nanospheres containing iron acetylacetonate are placed in a tube furnace, and the lignin nanospheres are preoxidized at a preoxidation temperature of 280° C. The preoxidation is carried out in air, and the temperature rises The rate is 0.2°C / min, and the pre-oxidation time is 2h;

[0041]...

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Abstract

The invention belongs to the technical field of nanocomposites and discloses a magnetic carbon nano-microsphere taking lignin as a carbon source and a preparation method of the magnetic carbon nano-microsphere. The preparation method includes: dissolving the lignin and ferric acetylacetonate in N,N-dimethylformamide to obtain an electrostatic lignin spray solution containing the ferric acetylacetonate, and then obtaining the lignin nano-microsphere containinging the ferric acetylacetonate through electrostatic spraying; performing pre-oxidation on the obtained lignin nano-microsphere under the temperature ranging from 250DEG C to 280DEG C prior to carbonization treatment under the temperature of 400DEG C to 900DEG C to obtain the magnetic carbon nano-microsphere taking the lignin as the carbon source. The preparation method has the advantages that raw materials are easy to obtain, energy conservation and environment protection is achieved, the obtained product is good in microstructure and dispersing and magnetic performance, and good application prospect in fields of information, energy sources, detection, biology and the like is achieved.

Description

technical field [0001] The invention belongs to the technical field of nano-composite materials, and in particular relates to a magnetic carbon nano-microsphere with lignin as a carbon source and a preparation method thereof. Background technique [0002] In recent years, how to effectively and fully use abundant, renewable and environmentally friendly biomass resources to alleviate severe energy and environmental problems has attracted widespread attention from all walks of life. [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. Commercial lignin, as a by-product of papermaking industry, exists in papermaking black liquor, and is rarely further processed and utilized, resulting in waste of resources and even environmental problems. Lignin molecules are rich in carbon content, so the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02H01F1/01H01F41/02
CPCH01F1/01H01F41/02C01P2004/32
Inventor 彭新文周子丹钟林新孙润仓
Owner SOUTH CHINA UNIV OF TECH
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