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Oriented fiber aerogel heat-insulating compound material and preparation method thereof

A composite material and aerogel technology, which is applied in the field of thermal insulation composite materials, can solve the problems of airgel performance impact and unclear improvement, and achieve the effects of flexible structure controllability, weight reduction, and improved damage resistance

Active Publication Date: 2012-06-20
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the fiber reinforcement method is the most effective method to improve the mechanical properties of airgel thermal insulation materials. In fiber reinforced airgel thermal insulation composite materials, the arrangement of fibers is an important factor affecting the performance of thermal insulation composite materials. Some reports focus on random fiber or fiber mat airgel composites, but there are no literature reports on oriented fiber airgel thermal insulation composites. The influence of fiber arrangement and fiber layer layup design on airgel performance and improvement is unclear

Method used

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  • Oriented fiber aerogel heat-insulating compound material and preparation method thereof
  • Oriented fiber aerogel heat-insulating compound material and preparation method thereof
  • Oriented fiber aerogel heat-insulating compound material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0056] An oriented fiber airgel thermal insulation composite material, comprising at least one layer of fiber skeleton and airgel, the airgel is filled between the fiber skeleton; the fibers in the fiber skeleton are arranged neatly in the same direction, which is oriented Fibrous skeleton.

[0057] The oriented fiber airgel thermal insulation composite material not only has good mechanical properties but also effectively maintains the super thermal insulation performance of the airgel, and can be used in any field requiring thermal insulation protection measures.

Embodiment 2

[0059] An oriented fiber airgel thermal insulation composite material comprises a fiber skeleton and airgel, the airgel is filled between the fiber skeletons; the fibers in the fiber skeleton are arranged neatly in the same direction, which is an oriented fiber skeleton.

[0060] The oriented fiber skeleton has two layers.

[0061] The fibers in the fiber skeleton are glass fibers with an aspect ratio of 5000 and a fiber diameter of 20 μm.

[0062] The orientation directions between the oriented fiber skeleton layers are respectively placed in the same direction and placed in the orthogonal direction, and the finished products are respectively as follows: Figure 7 Figures a and b show.

[0063] The airgel is a silica airgel, and its preparation step is, first, use an acidic solvent to decompose the mixed solution of silicon alkoxide, alcohol solvent, and water with an acidic catalyst, and the silicon alkoxide described in this embodiment is positive Ethyl silicate (TEOS), d...

Embodiment 3

[0065] An oriented fiber airgel thermal insulation composite material comprises a fiber skeleton and airgel, the airgel is filled between the fiber skeletons; the fibers in the fiber skeleton are arranged neatly in the same direction, which is an oriented fiber skeleton.

[0066] The oriented fiber skeleton has four layers.

[0067] The fibers in the fiber skeleton are glass fibers with an aspect ratio of 5000 and a fiber diameter of 20 μm.

[0068] The orientation directions between the oriented fiber skeleton layers are placed in the same direction and placed in the orthogonal direction respectively, and the specific directions are as follows: Figure 4 Figures a to f are shown.

[0069] The airgel is a silica airgel, and its preparation step is, first, use an acidic solvent to decompose the mixed solution of silicon alkoxide, alcohol solvent, and water with an acidic catalyst, and the silicon alkoxide described in this embodiment is positive Ethyl silicate (TEOS), describ...

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Abstract

The invention provides an oriented fiber aerogel heat-insulating compound material and a preparation method thereof, belonging to the technical field of functional materials, and heat insulation and energy conservation. The oriented fiber aerogel heat-insulating compound material comprises a fiber skeleton and aerogel, wherein the aerogel is filled in the fiber skeleton; and fibers in the fiber skeleton are tidily arranged in the same direction, and the fiber skeleton is an oriented fiber skeleton. The oriented fiber aerogel heat-insulating compound material has a superhigh heat-insulating performance (the coefficient of heat conductivity is 0.013 W / m.K) and good pressure resistance and fracture resistance, and the heat-insulating performance, the pressure resistance and the fracture resistance are directionally controllable; the oriented fiber aerogel heat-insulating compound material can be widely applied to fields which require heat-insulating and heat-preserving measures; and the preparation method adopts a normal-pressure drying technology and a supercritical drying technology in the conventional aerogel preparing process is not used, so that the preparation cost of the aerogel heat-insulating compound material can be greatly reduced and the aerogel heat-insulating compound material is applicable to industrial production.

Description

technical field [0001] The invention belongs to the technical field of functional materials and heat insulation and energy saving, and specifically relates to a fiber airgel heat insulation composite material. Background technique [0002] Airgel is a lightweight nanoporous solid material with a spatial network structure composed of colloidal particles or polymer molecules cross-linked with each other. Due to its high specific surface area (500-1200m 2 / g), high porosity (up to 99.8%) and nano-scale pores (about 20nm) and other special microstructures, it is currently the best thermal insulation material for super thermal insulation materials, used in aerospace, chemical industry, transportation, construction, etc. Energy saving, textile and clothing and other fields have aroused extensive attention and attention. [0003] However, the porous framework of airgel has low strength, poor toughness, and unstable mechanical structure, which severely limits its practical applicat...

Claims

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Application Information

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IPC IPC(8): C04B30/02
Inventor 吴会军廖云丹丁云飞
Owner GUANGZHOU UNIVERSITY
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