Method for preparing carbon foam material from biomass tar

A technology of foamed carbon and biomass, which is applied in the field of foamed carbon material preparation, can solve problems such as complex preparation process, and achieve the effect of simple preparation process, high compressive strength and low price

Inactive Publication Date: 2011-01-26
BEIJING UNIV OF CHEM TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has limitations in the selection of raw coal, and the preparation process is complicated, requiring high temperature and high pressure equipment

Method used

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  • Method for preparing carbon foam material from biomass tar
  • Method for preparing carbon foam material from biomass tar
  • Method for preparing carbon foam material from biomass tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take by weighing 10g bamboo tar (Jiangsu Jiangyin Zhongju Agriculture and Forestry Technology Co., Ltd.) and 20g p-methylbenzene by mass ratio 0.5: 1, take by weighing 1.2g p-methylbenzene Sulfonic acid is used as a catalyst, placed in a three-necked flask, heated and stirred under a nitrogen atmosphere, and taken out after a constant temperature of 100°C for 1 hour to obtain a B-stage condensed polycyclic aromatic hydrocarbon resin.

[0022] Take 6g of the above B-stage resin in a beaker, heat it to 90°C, and slowly add 3ml of concentrated HNO after the resin is completely melted 3 Stir continuously until the temperature rises to 120° C., stop heating, take out the product, and grind to obtain oxidized B-stage resin powder.

[0023] Put the oxidized B-stage resin powder into a normal-pressure constant-volume mold and shake it tightly, then put it into a muffle furnace at 250°C, keep the temperature constant for 30 minutes, and then cool it out to obtain a foamed resin....

Embodiment 2

[0027] Take by weighing 30g wood tar and 10g terephthalenedimethanol by mass ratio 3: 1, take by weighing 2.4g p-toluenesulfonic acid as catalyst according to the ratio of wood tar and terephthalmic alcohol total mass 6%, place in three-necked flask , heated and stirred under a nitrogen atmosphere, reacted at a constant temperature of 120° C. for 3 hours, and then took it out to obtain a B-stage condensed polycyclic aromatic hydrocarbon resin.

[0028] Take 6g of the above-mentioned B-stage resin in a beaker, heat it to 100°C, and slowly add 2ml of concentrated H after the resin is completely melted. 2 SO 4 Stir continuously until the temperature rises to 140° C., stop heating, take out the product, and grind to obtain oxidized B-stage resin powder.

[0029] Put the oxidized B-stage resin powder into a normal-pressure constant-volume mold and shake it tightly, then put it into a muffle furnace at 300°C, keep the temperature constant for 80 minutes, and then cool it out to obt...

Embodiment 3

[0033] Take by weighing 50g bamboo tar and 10g p-toluene dimethanol by mass ratio 5: 1, take by weighing 5.4g p-toluenesulfonic acid as catalyst according to the ratio of bamboo tar and p-toluene dimethanol total mass 9%, place in three-necked flask , heated and stirred under a nitrogen atmosphere, kept at a constant temperature of 160° C. for 6 hours, and then taken out to obtain a B-stage condensed polycyclic aromatic hydrocarbon resin.

[0034] Take 6g of the above-mentioned B-stage resin in a beaker and heat it to 120°C. After the resin is completely melted, slowly add 4ml of hydrogen peroxide and keep stirring until the temperature rises to 140°C. Stop heating, take out the product, and grind it to obtain oxidized B-stage resin powder .

[0035] Put the oxidized B-stage resin powder into a normal-pressure constant-volume mold and shake it tightly, then put it into a muffle furnace at 400°C, keep the temperature constant for 120 minutes, and then cool it out to obtain a fo...

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Abstract

The invention provides a method for preparing a carbon foam material from biomass tar. First condensed polycyclic aromatic hydrocarbon resin is synthesized by the biomass tar; and then the synthesized resin is subjected to oxidation, foaming and carbonization to obtain the carbon foam. The prepared carbon foam has the advantages of spatial net structure, high open porosity, the density of 0.2 to 1g/cm<3>, the cell diameter of 50 to 500mu m, the compressive strength of 13.4MPa, and high thermal stability.

Description

technical field [0001] The invention relates to a method for preparing a foamed carbon material, in particular to a method for preparing a foamed carbon material by using biomass tar as a raw material. Background technique [0002] Foam carbon is a porous carbon material with carbon as the skeleton, which has excellent properties such as low density, high strength, thermodynamic stability, high thermal conductivity, and chemical corrosion resistance. Because of its high strength (up to 8.3MPa with coal as raw material), it can be used to replace carbon fiber braids; because of its thermodynamic stability and wide range of thermal conductivity (0.05-210W / m K), it can be used to prepare Materials with high thermal conductivity or good thermal insulation are used in large heat exchangers, heat removal devices for highly integrated computer CPUs, etc., and also have good application prospects in rocket engines and thermal protection systems in the aerospace field. In addition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 陈晓红孟月娜岳永德刘磊宋怀河
Owner BEIJING UNIV OF CHEM TECH
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