Foam skeleton reinforced organic aerogel and preparation method thereof

A foam skeleton and aerogel technology, applied in the field of composite materials, can solve the problems of difficult industrialization, high cost, complex supercritical system, etc., and achieve the effects of good compressibility, low cost, and controllable microscopic morphology

Inactive Publication Date: 2020-04-21
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the technology still uses the supercritical drying technology
The supercritical system is relatively complex, and industrialization is difficult and costly

Method used

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  • Foam skeleton reinforced organic aerogel and preparation method thereof
  • Foam skeleton reinforced organic aerogel and preparation method thereof
  • Foam skeleton reinforced organic aerogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of preparation method of the organic airgel that foam skeleton strengthens, comprises the following steps:

[0053] Add phenol, formaldehyde and hydrochloric acid in the reactor to react, the molar ratio of phenol to formaldehyde is 1:1, and the hydrochloric acid is 5% molar weight of phenol, to obtain a light yellow viscous liquid; adjust the temperature to 90°C to continue the reaction, and adjust When the pH is 7, vacuumize to obtain a phenolic resin. Then weigh a certain amount of phenolic resin and isopropanol respectively, add them into the stirring tank, stir mechanically until they are completely dissolved, finally add hexamethylenetetramine, and continue stirring for 1 hour to obtain a phenolic resin impregnation solution, in which the phenolic resin, isopropyl alcohol The mass ratio of propanol and hexamethylenetetramine is 10:90:2, and the mass fraction of phenolic resin is 10%.

[0054] Set the density to 10kg / m 3 The melamine foam is laid flat in a...

Embodiment 2

[0056] A kind of preparation method of the organic airgel that foam skeleton strengthens, comprises the following steps:

[0057] Add phenol, formaldehyde and hydrochloric acid in the reactor to react, the molar ratio of phenol to formaldehyde is 1:1, and the hydrochloric acid is 5% molar weight of phenol, to obtain a light yellow viscous liquid; adjust the temperature to 90°C to continue the reaction, and adjust When the pH is 7, vacuumize to obtain a phenolic resin. Then weigh a certain amount of phenolic resin and isopropanol respectively, add them into the stirring tank, stir mechanically until they are completely dissolved, finally add hexamethylenetetramine, and continue stirring for 1 hour to obtain a phenolic resin impregnation solution, in which the phenolic resin, isopropyl alcohol The mass ratio of propanol and hexamethylenetetramine is 10:90:2, and the mass fraction of phenolic resin is 10%.

[0058] Set the density to 20kg / m 3 The melamine foam is laid flat in a...

Embodiment 3

[0060] A kind of preparation method of the organic airgel that foam skeleton strengthens, comprises the following steps:

[0061] Add phenol, formaldehyde and hydrochloric acid in the reactor to react, the molar ratio of phenol to formaldehyde is 1:1, and the hydrochloric acid is 5% molar weight of phenol, to obtain a light yellow viscous liquid; adjust the temperature to 90°C to continue the reaction, and adjust When the pH is 7, vacuumize to obtain a phenolic resin. Then weigh a certain amount of phenolic resin and isopropanol respectively, add them into the stirring tank, stir mechanically until they are completely dissolved, finally add hexamethylenetetramine, and continue stirring for 1 hour to obtain a phenolic resin impregnation solution, in which the phenolic resin, isopropyl alcohol The mass ratio of propanol and hexamethylenetetramine is 15:85:3, and the mass fraction of phenolic resin is 15%.

[0062] Set the density to 10kg / m 3 The melamine foam is laid flat in a...

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Abstract

The invention relates to foam skeleton reinforced organic aerogel and a preparation method thereof. The aerogel is prepared from the following components in percentage by mass: 80-95 omega t% of organic resin and 5-20 omega t% of organic porous foam, the organic resin comprises phenolic resin, the organic porous foam comprises one or more of polyurethane foam, polyimide foam, melamine foam and phenolic foam, and the preparation method comprises the following steps: (1) preparing an organic resin solution, (2) carrying out low-pressure impregnation, (3) carrying out a sol-gel reaction process and (4) drying the aerogel under normal pressure. Compared with the prior art, the foam skeleton reinforced organic aerogel has the advantages of compressibility, hydrophobicity, favorable flame retardancy and the like.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to an organic airgel reinforced with a foam skeleton and a preparation method thereof. Background technique [0002] Aerogels are nanoporous solid materials with high specific surface area, high porosity, and low density, which have diverse applications including thermal insulators, environmental treatment, catalytic supports, energy storage devices, and aerospace applications. Aerogels are usually fabricated from various precursors via sol-gel method, including cellulose nanofibers, phenol formaldehyde (PF), carbon nanotubes (CNTs), graphene oxide (GO) and their hybrid aerogels. Among them, phenol formaldehyde has a high carbon residue rate, and the formed carbon layer structure is dense and stable, which can be used for energy storage, catalysis, heat preservation and other aspects. [0003] Due to its unique nano-network and nano-pore structure, the thermal conductivity of air...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L61/06C08L61/28
CPCC08J9/28C08J2361/06C08J2461/28C08J2361/28C08J2461/06C08J2205/044C08J2205/026
Inventor 龙东辉吴克德张亚运曹俊翔曹宇李晓飞谭皓洋
Owner EAST CHINA UNIV OF SCI & TECH
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