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A kind of porous carbon material with gradient gradient pore structure and its preparation method

A porous carbon material and gradient pore technology, applied in the field of gradient functional materials and their preparation, can solve the problem of inability to obtain a gradient gradient pore structure, and achieve the effects of low equipment requirements, easy industrial production, and low cost

Inactive Publication Date: 2015-10-14
XINYU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the phase separation is induced by the "random fluctuation" of the initial homogeneous microdomain composition and energy, the polymerization-induced phase separation pyrolysis method always has an insurmountable blind spot in the design and tailoring of the pore structure: it is impossible to obtain gradient pore structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Ingredients: First, mix the carbonaceous precursor thermosetting phenolic resin and the pore-forming agent ethylene glycol in a weight ratio of 1:1.5, and then add the curing catalyst benzenesulfonate of 6% of the total weight of the carbonaceous precursor and the pore-forming agent in sequence Acyl chloride and 6% water are mixed uniformly to obtain a mixture;

[0021] 2) Directional curing: pour the mixture into the mold, and gradually increase or decrease the curing temperature from one end to the other along one direction of the sample in the mold. The curing temperature ranges from 15 to 60°C, and the holding time is 8 hours;

[0022] 3) Deep curing: demould the directional cured sample and place it at 60°C, raise the temperature to 180°C at a heating rate of 1°C / h, and then keep it warm for 16 hours;

[0023] 4) Pyrolysis: put the deep solidified product in N 2 Carry out pyrolysis under protection, rise from room temperature to 800°C, keep warm for 1h, and the...

Embodiment 2

[0026] 1) Ingredients: First, mix the carbonaceous precursor thermosetting phenolic resin and the pore-forming agent ethylene glycol in a weight ratio of 1:1.5, and then add the curing catalyst benzenesulfonate of 6% of the total weight of the carbonaceous precursor and the pore-forming agent in sequence Acyl chloride and 10% water are mixed uniformly to obtain a mixture;

[0027] 2) Directional curing: pour the mixture into the mold, and gradually increase or decrease the curing temperature from one end to the other along one direction of the sample in the mold. The curing temperature ranges from 15 to 80°C, and the holding time is 20 hours;

[0028] 3) Deep curing: demould the directional cured sample and place it at 60°C, raise the temperature to 180°C at a heating rate of 1°C / h, and then keep it warm for 16 hours;

[0029] 4) Pyrolysis: put the deep solidified product in N 2 Carry out pyrolysis under protection, rise from room temperature to 800°C, keep warm for 1h, and t...

Embodiment 3

[0032] 1) Ingredients: First, mix the carbonaceous precursor furfuryl alcohol resin and the pore-forming agent polyethylene glycol 200 evenly at a weight ratio of 1:1.5, and then add the curing catalyst pair of 10% of the total weight of the carbonaceous precursor and the pore-forming agent in sequence. Mix toluenesulfonic acid and 2.5% water evenly to obtain a mixture;

[0033] 2) Directional curing: pour the mixture into the mold, and gradually increase or decrease the curing temperature from one end to the other along one direction of the sample in the mold, the curing temperature ranges from 10 to 90°C, and the holding time is 1.5h;

[0034] 3) Deep curing: demould the directional cured sample and place it at 60°C, raise the temperature to 180°C at a heating rate of 1°C / h, and then keep it warm for 16 hours;

[0035] 4) Pyrolysis: put the deep solidified product in N 2 Carry out pyrolysis under protection, rise from room temperature to 800°C, keep warm for 1h, and the hea...

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PUM

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Abstract

The invention discloses a porous carbon material with a gradient pore structure and a preparation method thereof. The pore structure of the porous carbon material has gradient along a direction, namely the porosity, mean pore size and specific surface area of the pore structure are gradually increased or decreased from one end to the other end of the porous carbon material, the porosity ranges from 10 percent to 70 percent, the pore size ranges from 10nm to 10mu m, and the specific surface area ranges from 10m<2> / g to 2000m<2> / g. The porous carbon material with the gradient pore structure is synthesized by performing four processes of burdening, directional curing, deep curing and pyrolysis on a liquid resin carbon precursor, a micromolecular alcohol pore forming agent and a curing catalyst. The porous carbon material is endowed with the gradient pore structure by changing phase separation conditions of a mixture system along the gradient curing temperature in a direction of a sample in the directional curing stage.

Description

technical field [0001] The invention relates to a gradient functional material and a preparation method thereof, in particular to a porous carbon material with a gradient gradient pore structure and a preparation method thereof. Background technique [0002] Gradient porous materials are one of the important parts of gradient functional materials. They have been widely used in people's daily life, industry and national defense, such as biomedical materials, piezoelectric materials, thermal insulation materials, porous electrodes, sound-absorbing materials, gas Separation materials and filter materials, etc. At present, the materials of gradient porous materials (that is, the chemical composition of materials) mainly involve three categories: metals, ceramics, and polymers. Due to the limitation of the preparation technology to a large extent, there are no related reports and related patents in the existing published literature for the gradient porous material with carbon ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C01B32/05
Inventor 徐顺建罗玉峰钟炜肖宗湖罗永平李水根
Owner XINYU UNIV