A kind of submicron inorganic whisker airgel thermal insulation composite material and preparation method thereof

A technology of inorganic whiskers and composite materials, which is applied in the field of submicron inorganic whisker airgel thermal insulation composite materials and its preparation, can solve the problems of low porous skeleton strength, low toughness, and high production costs, and achieve large-scale and Streamlined production, good fire resistance and safety performance, and the effect of reducing production costs

Active Publication Date: 2016-08-17
广东泽文杰科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention proposes a submicron inorganic whisker airgel thermal insulation composite material, which overcomes the characteristics of low strength, low toughness, poor mechanical properties and unstable structure of airgel in the prior art.
[0006] The present invention also proposes a method for preparing a submicron inorganic whisker airgel thermal insulation composite material, which overcomes the defects of complex preparation process and high production cost of airgel in the prior art

Method used

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  • A kind of submicron inorganic whisker airgel thermal insulation composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0039] According to the content of the present invention, the inventors have made SiC submicron whiskers / SiO 2 Airgel, the specific steps are as follows:

[0040] (1) Add stearic acid and SiC submicron whiskers into absolute ethanol, stir for 0.5 hour at a temperature of 50°C and a stirring speed of 500 rpm, and then put it into a drying oven at 80°C for 8 hours, obtain the modified SiC submicron whiskers;

[0041] (2) Add ethyl orthosilicate to absolute ethanol, under the conditions of temperature 30°C and stirring speed 200 r / min, then add water and hydrochloric acid in sequence to make the pH value between 3 and obtain a mixture Solution A, the ratio of ethyl orthosilicate, absolute ethanol, water, and hydrochloric acid is 1:5:2:1×10 in molar ratio -5 ; The mixed solution A was left to stand at a temperature of 30°C for 0.1 hour, and then at a temperature of 30°C and a stirring speed of 200 rpm, DMF was added, and after stirring for 3 minutes, ammonia water was added and ...

Embodiment 2

[0046] According to the content of the present invention, the inventor has made potassium hexatitanate submicron whisker / SiO 2 Airgel, the specific steps are as follows:

[0047] (1) Add sodium lauryl sulfate and potassium hexatitanate submicron whiskers into anhydrous methanol, stir for 1 hour at a temperature of 80°C and a stirring speed of 1000 rpm, and then put it in 120 ℃ in a drying oven for 24 hours to obtain the modified potassium hexatitanate submicron whiskers;

[0048] (2) Water glass is added in anhydrous methanol, under the condition that the temperature is 60° C. and the stirring speed is 800 rpm, water and oxalic acid are added in turn to make the pH value between 4 to obtain the mixed solution A, The ratio of the water glass, anhydrous methanol, water and oxalic acid is 1:40:10:5×10 in molar ratio -5 ; The mixed solution A was left to stand at a temperature of 80°C for 24 hours, and then at a temperature of 60°C and a stirring speed of 800 rpm, formamide was ...

Embodiment 3

[0053] According to the content of the present invention, the contriver makes calcium sulfate submicron whisker / SiO 2 Airgel, the specific steps are as follows:

[0054] (1) Add Tween-80 and calcium sulfate submicron whiskers into anhydrous isopropanol, stir for 0.8 hours at a temperature of 60°C and a stirring speed of 800 rpm, and then put it in a 100°C 12 hours in a drying oven to obtain the modified calcium sulfate submicron whiskers;

[0055] (2) Add diatomaceous earth to anhydrous isopropanol, under the condition of temperature of 50°C and stirring speed of 600 rpm, then add water and sulfuric acid in turn to make the pH value between 3.5, and obtain a mixture Solution A, the molar ratio of diatomaceous earth, anhydrous isopropanol, water, and sulfuric acid is 1:20:8:3×10 -5 ; The mixed solution A was left to stand at a temperature of 60°C for 12 hours, and then at a temperature of 50°C and a stirring speed of 600 rpm, acetamide was added, and after stirring for 3 minu...

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Abstract

The invention provides a submicron inorganic whisker aerogel thermal insulation composite. The submicron inorganic whisker aerogel thermal insulation composite comprises an aerogel matrix and submicron inorganic whiskers, wherein the aerogel matrix is filled between the submicron inorganic whiskers; the submicron inorganic whisker aerogel thermal insulation composite has excellent mechanical properties and structural stability. The invention also provides a preparation method of the submicron inorganic whisker aerogel thermal insulation composite; the high-cost supercritical drying technology generally adopted in aerogel preparation is replaced by a low-cost normal-pressure drying process, and therefore, the production cost of the aerogel thermal insulation material is remarkably reduced and large-scale and flow production of the submicron inorganic whisker aerogel thermal insulation composite can be realized.

Description

technical field [0001] The invention belongs to the field of heat insulation materials, in particular to a submicron inorganic whisker airgel heat insulation composite material and a preparation method thereof. Background technique [0002] Thermal insulation materials can effectively reduce heat loss and are widely used in construction, industry, aerospace and other fields. Airgel is currently the best solid material for thermal insulation. Airgel is composed of colloidal particles or polymer molecules cross-linked with each other. It has a nanoporous space grid structure, a specific surface area of ​​500-1200m2·g-1, a porosity of 99.8%, and a pore size of about 10-100%. 100nm, this nano-spatial structure, high specific area porosity and nano-scale pore size make it have excellent heat insulation performance. However, the porous skeleton of airgel has low strength, low toughness, poor mechanical properties, and unstable structure, which limit the practical application of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/24C04B14/38
Inventor 吴会军钟支葵陈奇良丁云飞
Owner 广东泽文杰科技有限公司
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