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Method for preparing phenolic foam material and foam carbon material by self-foaming

A phenolic foam material and a self-foaming technology, applied in the field of phenolic foam materials and foam carbon materials, can solve the problems of complex process, high energy consumption, environmental pollution and the like, and achieve the advantages of low process energy consumption, high mechanical strength and reduced production cost. Effect

Active Publication Date: 2017-01-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of phenolic resin-based foamed carbon material is based on the preparation process of phenolic foam, which is obtained by pyrolyzing phenolic foam in an inert atmosphere. Therefore, the preparation process of foamed carbon material also has problems of complex process, high energy consumption and environmental pollution.

Method used

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  • Method for preparing phenolic foam material and foam carbon material by self-foaming
  • Method for preparing phenolic foam material and foam carbon material by self-foaming
  • Method for preparing phenolic foam material and foam carbon material by self-foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve 100 parts of resorcinol, 150 parts of gelatin, and 20 parts of malonic acid in 600 parts of hot water at 40-90°C, stir and dissolve for 60-120 minutes, and after completely dissolving, a light yellow viscous solution is obtained; then, under stirring conditions, , quickly inject 150 parts of 37% formaldehyde solution, the above reaction solution quickly gels, and is white; the reaction container is placed in an oven at 60-90°C for normal pressure (that is, the pressure is 0) foaming and solidification, the time is 4h, cooling And after drying for 24 hours, a block-shaped phenolic foam material is obtained. Its compressive strength is 0.16MPa, and the mercury intrusion test shows that its total pore volume is 7.4cm 3 g -1 , the porosity is 83%.

[0032] Put the phenolic foam material prepared by the self-foaming method into a carbonization furnace for carbonization. Under the protection of inert gas nitrogen or argon, the gas flow rate is 20-100ml / min, and the...

Embodiment 2

[0034] Dissolve 100 parts of resorcinol, 150 parts of gelatin, and 20 parts of malonic acid in 600 parts of hot water at 40-90°C, stir and dissolve for 60-120 minutes, and after completely dissolving, a light yellow viscous solution is obtained; then, under stirring conditions, , quickly inject 150 parts of 37% formaldehyde solution, the above reaction solution quickly gels and turns white; close the reaction vessel, place it in an oven at 60-90°C, and perform foaming and solidification under its autogenous pressure for 4 hours, cool And after drying for 24 hours, a block-shaped phenolic foam material is obtained. Its compressive strength is 4.30MPa, and the mercury intrusion test shows that its total pore volume is 5.1cm 3 g -1 , the porosity is 76%.

[0035] Put the phenolic foam material prepared by the self-foaming method into a carbonization furnace for carbonization. Under the protection of inert gas nitrogen or argon, the gas flow rate is 20-100ml / min, and the tempera...

Embodiment 3

[0037] Dissolve 100 parts of resorcinol, 80 parts of gelatin, and 8 parts of malonic acid in 600 parts of hot water at 40-90°C, stir and dissolve for 60-120 minutes, and after completely dissolving, a light yellow viscous solution is obtained; then under stirring conditions , quickly inject 150 parts of 37% formaldehyde solution, the above reaction solution quickly gels and turns white; close the reaction vessel, place it in an oven at 60-90°C, and perform foaming and solidification under its autogenous pressure for 4 hours, cool And after drying for 24 hours, a block-shaped phenolic foam material is obtained. Its compressive strength is 1.42MPa.

[0038]Put the phenolic foam material prepared by the self-foaming method into a carbonization furnace for carbonization. Under the protection of inert gas nitrogen or argon, the gas flow rate is 20-100ml / min, and the temperature is raised from room temperature to 300°C at a rate of 1-3°C / min. Carry out preliminary pyrolysis for 60 ...

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Abstract

The invention discloses a method for self-foaming preparation of a phenolic foam materiel. Water is used as a solvent, quick copolymerization of phenol, aldehyde and gelatin is aroused by gelatin, and meanwhile, Knoevenagel reaction between organic diacid and aldehyde is utilized for heating decarboxylation to release CO2 as a foamer, so that one-step self-foaming preparation of the phenolic foam materiel is realized. The invention also provides a method for obtaining a foam carbon material through taking the phenolic foam material prepared by adopting the above method as a precursor and further carbonizing the phenolic foam material. According to the invention, the energy consumption is low, the operation is simple, a foamer, a curing agent, a surfactant and the like are not required to be added, the traditional procedure process for preparing the phenolic foam material and the foam carbon material is simplified, the manufacturing cost is greatly lowered, environmental pollution is reduced and a process technology with a favorable market prospect is achieved.

Description

technical field [0001] The invention belongs to the field of phenolic foam materials and foamed carbon materials, and relates to a self-foaming preparation process; in particular, it relates to a method for preparing phenolic foam materials and foamed carbon materials by one-step self-foaming reaction. Background technique [0002] Phenolic foam material is a new type of foam plastic, which has the advantages of light weight, low toxicity, flame retardancy, heat insulation, sound insulation, etc., and is widely used as thermal insulation, sound insulation and Insulation materials. At present, the typical preparation method of phenolic foam material is to prepare expandable phenolic resin in advance, add foaming agent, curing agent and surfactant, etc., heat at high temperature, and form phenolic foam material through the volatilization of foaming agent, but this traditional The preparation process is complicated in operation and high in energy consumption, and some foaming ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/08C08G16/06C01B31/02
Inventor 陆安慧张玲
Owner DALIAN UNIV OF TECH