Carbon foam material with core-shell structure and method for preparing carbon foam material

A technology of core-shell structure and carbon foam, which is applied in the field of carbon foam preparation, can solve problems such as uneven distribution and large pore diameter, and achieve the effect of simple and effective preparation process, high safety and reliable working environment

Inactive Publication Date: 2014-07-23
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the objectives of the present invention is to provide a carbon foam material with a core-shell structure prepared by a coaxial electrospray device in order to solve the problem of large hole diameter and uneven distribution in the carbon foam material in the prior art

Method used

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  • Carbon foam material with core-shell structure and method for preparing carbon foam material
  • Carbon foam material with core-shell structure and method for preparing carbon foam material
  • Carbon foam material with core-shell structure and method for preparing carbon foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A carbon foam material with a core-shell structure, that is, a mixed solution of N, N-dimethylacetamide with a concentration of 3% (w / v) polyacrylonitrile and 1% (w / v) borneol as the sheath liquid , using acetone solution with a concentration of 20% (w / v) borneol as the core fluid, the distance between the nozzle of the coaxial nozzle and the receiving plate is controlled by a coaxial electrospray device to be 15cm, the voltage is 20kV, and the flow rate of the sheath fluid is 1.0 ml / h , the flow rate of the core liquid is 0.5 ml / h for spraying to obtain a film-like material;

[0040] Then dry the membrane material under the condition of elevated temperature and ventilation to obtain a solid mixed membrane material;

[0041] Then, pre-oxidize, carbonize, and high-temperature graphitize the solid mixed membrane material to obtain a carbon foam material with a core-shell structure.

[0042] The above-mentioned preparation method of a carbon foam material with a core-shel...

Embodiment 2

[0054] A carbon foam material with a core-shell structure, that is, a mixed solution of N, N-dimethylacetamide with a concentration of 3% (w / v) polyacrylonitrile and 1% (w / v) borneol as the sheath liquid , using acetone solution with a concentration of 20% (w / v) borneol as the core liquid, the distance between the nozzle of the coaxial nozzle and the receiving plate is controlled by a coaxial electrospray device to be 15cm, the voltage is 20kV, and the flow rate of the sheath liquid is 3.0 ml / h , the flow rate of the core liquid is 1.0ml / h to spray to obtain a film-like material;

[0055] Then dry the membrane material under the condition of elevated temperature and ventilation to obtain a solid mixed membrane material;

[0056] Then, pre-oxidize, carbonize, and high-temperature graphitize the solid mixed membrane material to obtain a carbon foam material with a core-shell structure.

[0057] The above-mentioned preparation method of a carbon foam material with a core-shell s...

Embodiment 3

[0060] A carbon foam material with a core-shell structure, that is, a mixed solution of N, N-dimethylacetamide with a concentration of 3% (w / v) polyacrylonitrile and 1% (w / v) borneol as the sheath liquid , using acetone solution with a concentration of 20% (w / v) borneol as the core liquid, the distance between the nozzle of the coaxial nozzle and the receiving plate is controlled by a coaxial electrospray device to be 15cm, the voltage is 20kV, and the flow rate of the sheath liquid is 0.5ml / h , the flow rate of the core fluid is 0.1ml / h to spray to obtain a film-like material;

[0061] Then dry the membrane material under the condition of elevated temperature and ventilation to obtain a solid mixed membrane material;

[0062] Then, pre-oxidize, carbonize, and high-temperature graphitize the solid mixed membrane material to obtain a carbon foam material with a core-shell structure.

[0063] The above-mentioned preparation method of a carbon foam material with a core-shell str...

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Abstract

The invention discloses a carbon foam material with a core-shell structure and a preparation method thereof, that is, firstly, a mixed solution of polyacrylonitrile and borneol in N,N-dimethylacetamide is used as a sheath liquid, and acetone solution of borneol is used as a core liquid , the film-like material is prepared by a coaxial electrostatic spray device; then the film-like material is dried under the condition of elevated temperature and ventilation to obtain a solid mixed film material; and then the solid mixed film material is pre-oxidized, carbonized and high-temperature graphitized to obtain Carbon foam material with core-shell structure. The carbon foam material with a core-shell structure prepared by the invention has uniform and small cells, high controllability and excellent performance; the preparation process is simple and effective, the working environment is reliable, the safety is high, and it is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of carbon foam preparation, in particular based on a carbon foam material with a core-shell structure and a preparation method thereof. Background technique [0002] Carbon foam is a lightweight solid material with carbon atoms as the skeleton, which are interconnected to form a porous network structure. According to different precursors and preparation processes, this new type of porous functional material can be made into thermal insulation materials with low thermal conductivity (0.3 W / m K) or high thermal conductivity (150 W / m K ) of thermally conductive material. In addition, it also has excellent properties such as high porosity, large specific surface area, low density, low thermal expansion coefficient, high temperature resistance, and corrosion resistance. Therefore, carbon foam has great potential in the fields of thermal control materials, electrode materials, catalysis, and environmental protection. Broa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C01B32/05
Inventor 杨俊和杨光智余灯广王霞赵斌
Owner UNIV OF SHANGHAI FOR SCI & TECH
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