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Airgel composite foam core material for thermal insulation board and preparation method thereof

A composite foam and thermal insulation board technology, which is applied in the field of lightweight polymer-based composite materials, can solve the problems of difficult foam core material process and high production cost, and achieve the effects of low cost, convenient operation and excellent mechanical properties

Active Publication Date: 2022-06-07
GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the commonly used PMI foam core material process is difficult to control and the production cost is high, the purpose of the present invention is to provide an airgel composite foam core material for thermal insulation board and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of aerogel composite foam core material for thermal insulation board, the steps are as follows:

[0024] (1) Weigh the following materials by weight: 100 parts of epoxy resin E51, 10 parts of expandable microsphere foaming agent EM406 (produced by Nippon Oil Pharmaceutical Co., Ltd., with an average diameter of 20 μm), 593 curing agent 35 parts, accelerator 2,4,6-tris(dimethylaminomethyl)phenol 0.1 part, silane coupling agent 0.2 part, mix the above materials evenly to obtain foamable prepreg;

[0025] (2), immersing the silica aerogel felt in the foamable prepreg obtained in step (1);

[0026] (3) After the impregnation is completed, take out the silica aerogel felt, place it in the mold, and cure it for 12 min under the conditions of a pressure of 0.5 Mpa and a temperature of 100 °C to obtain the aerogel composite foam core material for thermal insulation boards. .

[0027] The density of the aerogel composite foam core material for thermal insu...

Embodiment 2

[0029] A preparation method of aerogel composite foam core material for thermal insulation board, the steps are as follows:

[0030] (1) Weigh the following materials in parts by weight: 100 parts of epoxy resin E51, 12 parts of expandable microsphere foaming agent EHM401 (average diameter 60 μm), 80 parts of methyltetrahydrophthalic anhydride curing agent, Accelerator 2,4,6-tris(dimethylaminomethyl)phenol 2 parts, silane coupling agent 3 parts, the above materials are mixed evenly to obtain foamable prepreg;

[0031] (2), immersing the silica aerogel felt in the foamable prepreg obtained in step (1);

[0032] (3) After the impregnation is completed, take out the silica aerogel felt, place it in the mold, and cure it for 12 min under the conditions of a pressure of 0.8 Mpa and a temperature of 105 °C to obtain the aerogel composite foam core material for thermal insulation boards. .

[0033] The density of the aerogel composite foam core material for thermal insulation board...

Embodiment 3

[0035] A preparation method of aerogel composite foam core material for thermal insulation board, the steps are as follows:

[0036] (1) Weigh the following materials by weight: 100 parts of epoxy resin E51, 15 parts of expandable microsphere foaming agent TEP-160 (average diameter 80 μm), 160 parts of DDSA curing agent, accelerator 3 parts of 2,4,6-tris(dimethylaminomethyl)phenol and 5 parts of silane coupling agent, and the above materials are mixed evenly to obtain a foamable prepreg;

[0037] (2), immersing the silica aerogel felt in the foamable prepreg obtained in step (1);

[0038] (3) After the impregnation is completed, take out the silica aerogel felt, place it in the mold, and cure it for 10 minutes under the conditions of a pressure of 1 Mpa and a temperature of 110 °C, that is, the aerogel composite foam core material for thermal insulation boards is obtained. .

[0039] The density of the aerogel composite foam core material for thermal insulation boards prepar...

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Abstract

The invention belongs to the technical field of lightweight polymer-based composite materials, and discloses an airgel composite foam core material for thermal insulation boards and a preparation method thereof. The airgel composite foam core material for the thermal insulation board is composed of silica airgel felt and a foam layer formed integrally with it. The steps are as follows: in parts by weight, weigh the following materials: 100 parts of liquid epoxy resin, 10-15 parts of expandable microsphere foaming agent, 60-150 parts of curing agent, 0-3 parts of accelerator, coupling 0-5 parts of agent, mix the above materials evenly to obtain a foamable prepreg; impregnate the silica airgel felt in the foamable prepreg; take out the silica airgel felt after impregnation, Carrying out thermocompression solidification molding, namely. The composite foam core material prepared by the invention combines the good mechanical properties of the foam and the excellent thermal insulation properties of the airgel felt.

Description

technical field [0001] The invention belongs to the technical field of lightweight polymer-based composite materials, in particular to an aerogel composite foam core material for thermal insulation boards and a preparation method thereof. Background technique [0002] The composite sandwich structure can not only reduce the cost and weight of composite materials, but also increase the section moment of inertia of the skin to improve the bending stiffness of the structure. In the composite sandwich structure, the high-strength, high-modulus skin material is composed of continuous fibers / resin, which mainly bear in-plane and bending loads; the relatively thick lightweight foam core mainly bears out-of-plane shear loads. Commonly used sandwich materials mainly include honeycomb structure, lightweight foamed foam, and composite foam. [0003] Thin-layer sandwich composites have been widely used in the fields of electronic communication equipment and automobiles. They usually ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/64
CPCC04B41/4905C04B41/64C04B41/4853C04B41/46
Inventor 姚栋嘉董会娜吕多军刘喜宗吴恒张东生杨超李静冯婷
Owner GONG YI VAN-RES INNOVATION COMPOSITE MATERIAL CO LTD