Foamy carbon material preparation method based on principle of starch fermentation

A technology of starch fermentation and carbon foam, applied in the field of porous materials, can solve the problems of high electrical conductivity, low thermal conductivity, and low density of three-dimensional porous materials, and achieve easy industrial production, low raw material cost, high electrical conductivity, and compressive strength. Effect

Inactive Publication Date: 2018-02-02
HARBIN INST OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for making foamed carbon materials based on the principle of starch fermentation. This method aims at the problems encountered in the current non-metallic porous materials in terms of conductivity, pore size, pores and strength, and utilizes simple fermentation, drying and High-temperature carbonization process; the resulting three-dimensional porous material has high electrical conductivity, low density, low thermal conductivity and high strength

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  • Foamy carbon material preparation method based on principle of starch fermentation
  • Foamy carbon material preparation method based on principle of starch fermentation
  • Foamy carbon material preparation method based on principle of starch fermentation

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specific Embodiment approach 1

[0027] The specific embodiment one, a kind of method of making foam carbon material based on the principle of starch fermentation in the present embodiment is carried out according to the following steps:

[0028] Weigh 200g of starch and 3.5g of dry yeast, add 100ml of deionized water, stir for 10min and shape. After fermenting at a humidity of 75% and a temperature of 30°C, press it with your fingers without elasticity (the fermentation time generally takes 60 minutes), knead it into a set shape, and continue to ferment for the second time at a humidity of 80% and a temperature of 35°C until After pressing with fingers, there is no elasticity (secondary fermentation generally takes 60 minutes). The precursor obtained by the above fermentation was put into a drying oven and heated for 30 minutes to obtain a solidified starch porous structure. The porous material was placed in a vacuum drying oven, and dried for 12 hours at a vacuum degree of 20 Pa and a temperature of 50°C. ...

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Abstract

The invention discloses a foamy carbon material prepared on the basis of the principle of starch fermentation, and belongs to the field of porous materials. Starch, yeast and water are used as raw materials to prepare the foamy carbon material through curing, baking and forming; and a three-dimensional porous carbon material can be obtained after carbonization under the protection of high-temperature inert gas, natural cooling and drying. Scanning electron microscope and X-ray diffraction representation shows that the material is of a porous and ordered graphite structure; and mechanical testsindicate that the material has relatively strong stress strength under low density and is an ideal environmentally-friendly foamy carbon material with low cost and high strength.

Description

technical field [0001] The invention belongs to the field of porous materials; in particular, it relates to a manufacturing method of a high-conductivity, low-density, low-thermal-conductivity and high-strength three-dimensional porous material. Background technique [0002] With the development of science and technology, the research on aerospace and other aircraft in various countries is getting more and more in-depth, and the scope of space exploration is getting wider and wider. Therefore, the use environment of various aircraft is becoming more and more harsh, and the requirements for materials are getting more and more strict. For example, the aircraft shell not only requires low density and excellent mechanical properties, but also has good heat insulation, high temperature resistance, low temperature resistance, and electromagnetic shielding. The development of composite materials with excellent mechanical properties and multifunctionality will help to promote the d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/524C04B35/64C04B38/02
CPCC04B35/524C04B35/64C04B38/025C04B2235/6562C04B2235/77C04B2235/96C04B38/0067
Inventor 李宜彬袁野赫晓东杨明龙尹维龙李建军
Owner HARBIN INST OF TECH
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