Method for preparing starch-based carbon microsphere

A carbon microsphere and starch-based technology, which is applied in the field of preparation of starch-based carbon microspheres, can solve the problems of complex process, strict equipment requirements, inability to meet, etc., and achieve the effects of simple production process, low price and wide sources.

Inactive Publication Date: 2008-05-21

TIANJIN UNIV

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AI-Extracted Technical Summary

Problems solved by technology

[0004] The above-mentioned processes generally have problems such as complex processes and strict requirements on equipment, and the raw materials used are non-renewable ...

Abstract

The invention discloses a method used for preparing starch-based carbon microsphere, which pertains to the preparation technique of carbon microsphere. The procedure of the method comprises that cereal starch, tuber starch, bean starch and fruit starch of bananas and plantain are used as raw materials with a particle diameter of 2 to 120 micron; the raw materials are put into a heating furnace, heated to 62 to 300 DEG C at a certain heating rate in oxidizing atmosphere (for example, air, oxygen, ozone, etc.) and go through oxidation treatment under constant temperature for 2 to 72 hours. The starch after oxidation is put into a carbonization furnace, heated to 600 DEG C to 3000 DEG C at a certain heating rate under the protection of inert gas, treated for 0.5 to 48 hours at a constant temperature and then cooled to indoor temperature, and the starch-based carbon microsphere which keep original starch particle shape is obtained. The invention has the advantages of reproducible raw materials, wide source, low price, simple preparation process and low production cost, and being easy for large-scale production.

Technology Topic

CarbonizationHeating furnace +11

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Examples

Experimental program(5)

Example Embodiment

[0012] Example 1

[0013] In the heating furnace, in the air atmosphere, add 13.5g of corn starch (spherical or polygonal), after the heating furnace is raised to 120℃ at a heating rate of 0.5℃/min, constant temperature oxidation treatment for 48h; then the oxidation treatment After adding the starch to the carbonization furnace, in the N 2 Under protection, the nitrogen flow rate is 25ml/min, the carbonization furnace is heated to 600℃ at a heating rate of 2℃/min, and after constant temperature for 2h, the carbonization furnace is cooled to room temperature at a rate of 0.2℃/min, and the average particle size is 15μm starch-based carbon microspheres, the yield of carbon microspheres is 21.0%, and the specific surface area of the carbon microspheres measured by the BET method is 350.3m 2 /g; true density is 1.591g/cm 3.

Example Embodiment

[0014] Example 2

[0015] In the heating furnace, in the air atmosphere, add 14.0g corn starch, raise the heating furnace to 180℃ at a temperature rise rate of 5℃/min, and then conduct constant temperature oxidation treatment for 20h; then add the oxidized starch into the carbonization furnace , In N 2 Under the protection, the nitrogen flow rate is 50ml/min, and the carbonization furnace is heated to 1000℃ at a heating rate of 5℃/min. After constant temperature for 1.5h, the carbonization furnace is cooled to room temperature at a rate of 1℃/min to obtain the average particle size. Starch-based carbon microspheres of 12μm, the yield of the carbon microspheres is 16.5%, and the specific surface area of the carbon microspheres measured by the BET method is 110.8m 2 /g; true density is 1.617g/cm 3.

Example Embodiment

[0016] Example 3

[0017] In the heating furnace, add 20.0g corn starch (in spherical or polygonal shape) in the air atmosphere, raise the heating furnace to 260℃ at a heating rate of 20℃/min, and then conduct constant-temperature oxidation treatment for 12h; then it will undergo oxidation treatment After adding the starch to the carbonization furnace, in the N 2 Under protection, the nitrogen flow rate is 40ml/min, the carbonization furnace is heated to 2600°C at a temperature increase rate of 10°C/min, and after constant temperature for 1 hour, the carbonization furnace is cooled to room temperature at a rate of 20°C/min to obtain an average particle size of 10μm starch-based carbon microspheres, the yield of carbon microspheres is 13.4%, and the true density is 1.497g/cm 3.

PUM

Property	Measurement	Unit
The average particle size	15.0	µm
Specific surface area	350.3	m²/g
True density	1.591	g/cm³

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Wide variety of sources

Method of preparing positive electrode composite material of Lithium ion cell contg, ferrous phosphate lithium salt-carbon

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Owner:宜春天赐高新材料有限公司

Method for preparing starch-based carbon microsphere

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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