Preparation method for foam carbon

A carbon foam and carbon source technology, applied in ceramic products, applications, household appliances, etc., can solve the problems of high production cost, large initial investment, unfavorable industrialization, etc., and achieve high compressive strength, safe raw materials, and easy operation Effect

Inactive Publication Date: 2019-04-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, my country has not yet realized the industrialization of foamed carbon. The fundamental reasons are: 1) the existing process involves many steps, and the process is cumbersome, which is not conducive to the realization of industrialization; 2) the main process uses pitch, resin, coal, etc. as raw materials On the one hand, these are fossil energy or its derivatives, which are non-renewable; on the other hand, their prices are greatly affected by the supply of oil, and the risk of the ente

Method used

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  • Preparation method for foam carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take 1000g of carbon source powder as an example.

[0039] (1) Put 450g of water in the container, add 10g of yeast, stir evenly, add 50g of sugar, stir to dissolve completely, under stirring conditions, slowly sprinkle 1000g of flour (100 mesh) into the container, after the flour is added, repeat the kneading , And finally make a uniform dough. Place the dough in a thermostat at 40±2°C for 1 hour and wait for the yeast to ferment.

[0040] (2) The fermented dough is pressed into a block as required, with a thickness of 5mm, placed in an oven at 105±2℃, and baked for 30 minutes to make the dough foam and shape.

[0041] (3) After the above foaming and shaping step is completed, the furnace temperature is continued to rise to 230°C for pretreatment, and the temperature is kept for 30 minutes to remove moisture and oxidize and remove easily oxidized elements.

[0042] (4) After the above pretreatment is completed, move the pretreated sample into a high-temperature furnace, and u...

Embodiment 2

[0044] Take 1000g of carbon source powder as an example.

[0045] (1) Put 500g of water in the container, add 5g of yeast, stir evenly, add 60g of sugar, add TiO 2 150g flour (model R248), stir and disperse evenly, and under stirring conditions, slowly sprinkle the mixture of 600g flour (100 mesh) and 400g (100 mesh) corn flour into it. After the addition is complete, knead repeatedly, and finally make Into a uniform dough. Place the dough in a thermostat at 40±2°C for 1 hour and wait for the yeast to ferment. Take 30g of water and add 5g of NaHCO 3 After the dissolution is complete, the NaHCO 3 Add the solution to the dough and knead again to make the whole dough even, and let it stand for 20 minutes to complete the dough preparation.

[0046] (2) The fermented dough is pressed into 20×20×10mm as required, put in an oven at 105±2℃, and baked for 35min to make the dough foam and shape.

[0047] (3) After the above foaming and shaping step is completed, the furnace temperature is co...

Embodiment 3

[0050] Take 1000g of carbon source powder as an example.

[0051] (1) Put 550g of water in the container, add 10g of yeast, mix well, add 80g of white sugar, add 50g of carbon fiber with a length of 1-5mm, stir and disperse evenly, and under stirring conditions, add 500g of flour (80 mesh), 300g The uniformly mixed powder of corn flour (80 mesh) and 200 g of glutinous rice flour is slowly sprinkled in, and after the addition is completed, the kneading is repeated to form a uniform dough. Place the dough in a thermostat at 40±2°C for 1 hour and wait for the yeast to ferment.

[0052] (2) The fermented dough is pressed into a sheet with a thickness of 50mm as required, put in an oven at 100±2℃, and baked for 40min to make the dough foam and shape.

[0053] (3) After the above foaming and shaping step is completed, the furnace temperature is continued to rise to 250°C for pretreatment, and the temperature is kept for 25 minutes to remove water and oxidize and remove easily oxidizable e...

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Abstract

The invention discloses a preparation method for foam carbon. The method comprises the following steps: manufacturing a dough, carrying out foaming and molding, carrying out pretreatment, and carryingout carbonization and sintering so as to prepare the foam carbon. According to the invention, when higher requirements are required, graphitization treatment can be carried out under a protective atmosphere to obtain graphitized foam carbon. The method provided by the invention has the following advantages: a carbon source is a renewable resource, such as flour and corn flour, and is cheap and easily available; and the method provided by the invention has simple and safe process and low cost, and facilitates realizing industrialization.

Description

Technical field [0001] The invention belongs to the preparation of foamed carbon, and specifically relates to a method for preparing foamed carbon using one or more mixtures of flour, corn flour, glutinous rice flour, and rice flour as a carbon source. Background technique [0002] Foamed carbon is a new type of carbonaceous material, a three-dimensional network light porous material mainly composed of carbon element. Foamed carbon is a new material with excellent performance and a wide range of uses. It has low density, high temperature resistance, corrosion resistance, acid and alkali resistance, low water absorption, good heat insulation, and conductivity. In addition, it can have special functions such as catalysis and selective adsorption after doping or surface treatment. These excellent properties make foamed carbon have broad application prospects in many civilian and military fields such as heat exchangers, catalyst carriers, electronic devices, food, pharmaceuticals, p...

Claims

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Application Information

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IPC IPC(8): C04B35/52C04B38/02C04B35/83C04B35/80
CPCC04B35/806C04B35/52C04B35/83C04B38/02C04B38/025C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3232C04B2235/3244C04B2235/36C04B2235/40C04B2235/401C04B2235/402C04B2235/404C04B2235/405C04B2235/407C04B2235/408C04B2235/425C04B2235/428C04B2235/442C04B2235/5216C04B2235/5224C04B2235/96C04B38/0054
Inventor 穆松林穆欣颦杜军
Owner SOUTH CHINA UNIV OF TECH
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