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Preparation method of lightweight heat-proof phenolic resin radical foam charcoal

A technology of phenolic resin and lightweight heat insulation, which is applied in indirect heating dry distillation, petroleum industry, coke oven, etc., can solve the problems of little research on phenolic resin foam carbon, and achieve adjustable temperature program, compact structure, and small pore size Effect

Active Publication Date: 2007-09-26
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since the discovery of foam carbon, almost all researchers' interest and energy have been concentrated on coal-based, asphalt-based, coal tar and petroleum-based, and little research has been done on phenolic resin foam carbon.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] Example 1: At normal temperature and pressure, first mix 100g of thermoplastic phenolic resin, 12g of hexamethylenetetramine and 12g of NH 4 The CL mixture was milled to 100 mesh. At room temperature, fully dissolve the ground raw material and 0.5g Tween 80 with 1500mL absolute ethanol, and then pour it into an open container. Put the container containing the solution on the sample rack, carefully put it into a high-temperature autoclave, and blow in nitrogen gas to make the pressure in the autoclave reach 0.5MPa. After starting to heat up to 180°C with a temperature increase rate of 0.5°C / min, start to release the pressure carefully and slowly at a rate of 0.05MPa / h, so that the pressure in the kettle is slowly reduced to normal pressure (the temperature is kept constant at 180°C during the pressure relief process) ). Then, it was heated to 220° C. at a heating rate of 0.1° C. / min, and cured at a constant temperature for 5 hours to obtain a foamed carbon solidified p...

example 2

[0023] Example 2: At normal temperature and pressure, first mix 100g of thermoplastic phenolic resin, 10g of hexamethylenetetramine, 10g of NH 4 CL grinds the raw material to 200 mesh with a grinder. At room temperature, fully dissolve the ground raw material and 0.3g of Tween 60 in 1000mL of n-propanol, and then pour it into an open container. Put the container containing the solution on the sample rack, carefully put it into a high-temperature autoclave, and blow in nitrogen gas to make the pressure in the autoclave reach 0.5MPa. After starting to heat up to 180°C with a temperature increase rate of 0.5°C / min, start to release the pressure carefully and slowly at a rate of 0.1MPa / h, so that the pressure in the kettle is slowly reduced to normal pressure (the temperature is kept constant at 180°C during the pressure relief process) ). Then, it was heated to 220° C. at a heating rate of 0.1° C. / min, and cured at a constant temperature for 5 hours to obtain a foamed carbon so...

example 3

[0024] Example 3: At normal temperature and pressure, first mix 100g of thermoplastic phenolic resin, 8g of hexamethylenetetramine, 6g of NH 4 CL grinds the raw material to 200 mesh with a grinder. At room temperature, fully dissolve the ground raw material and 0.1g of Tween 800 with 800mL of isopropanol, and then pour it into an open container. Put the container containing the solution on the sample rack, carefully put it into a high-temperature autoclave, and feed nitrogen gas to make the pressure in the autoclave reach 1.8MPa. After starting to heat up to 180°C at a heating rate of 0.8°C / min, start to release the pressure carefully and slowly at a rate of 0.4MPa / h, so that the pressure in the kettle slowly drops to normal pressure (the temperature remains constant at 180°C during the pressure relief process) ). Then, it was heated to 220° C. at a heating rate of 0.1° C. / min, and cured at a constant temperature for 5 hours to obtain a foamed carbon solidified precursor. A...

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PUM

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Abstract

The invention discloses a preparing method of lightweight heat-proof phenol resin group foam carbon, which comprises the following steps: making thermoplastic phenol resin as base-material; fetching hexamethylenetetramine as hardener; adding foaming agent and hardener; dissolving evenly with organic solvent at normal temperature; decanting into open container carefully; putting the container on the example shelf; putting into high temperature autoclave; leading into high-purity N2; pressurizing and keeping at 0.5-2.0MPa; heating to 200-300 deg.c through temperature-program and foaming; hardening; getting phenol resin group foam carbon solidifying forerunner body; using graphous graphite powder and pulverized coke compound as charring heat conducting medium; heating to 800-1200 deg.c in the high temperature retort; getting phenol resin group foam carbon.

Description

[0001] Field [0002] The invention belongs to the preparation of foamed charcoal, in particular to a preparation method of lightweight heat-insulating phenolic resin-based foamed charcoal. Background technique [0003] Foamed carbon is a special new type of porous lightweight carbon material with small and interpenetrating pores, large specific surface area, and a wide range of density changes. It has a three-dimensional network structure composed of cells and interconnected cell walls. , optics, electricity, heat and dynamics have unique properties. Foamed carbon has been developed and applied rapidly since it was first produced by polymer pyrolysis and carbonization by American Walter Ford in 1964. Wide application prospects. In addition, foamed carbon has great development and utilization potential in energy storage materials, stealth materials, nuclear protection materials, catalyst supports, high-energy electrodes, etc. However, since the discovery of carbon foam, alm...

Claims

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Application Information

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IPC IPC(8): C01B31/02C01B31/04C08J9/00C08J9/02C10B47/28B29C67/20
Inventor 郭全贵雷世文史景利刘朗宋进仁
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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