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A kind of high temperature resistant silica aerogel insulation material

A technology of silicon dioxide and thermal insulation material, applied in the field of thermal insulation, can solve the problems of complex equipment, high risk, poor thermal insulation performance, etc., and achieve the effect of excellent thermal insulation performance and improved mechanical performance

Active Publication Date: 2021-07-13
JIANGSU DAMAONIU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] SiO 2 Due to its good thermal insulation performance, airgel is considered to be the best thermal insulation material in the world and the most promising thermal insulation material. However, as an aerogel itself, it has many inherent disadvantages of aerogel. Such as low strength, high brittleness and high cost restrict its promotion in engineering applications
[0004] Existing solution has following several: 1) short inorganic fiber and ceramic foam are compounded under certain conditions (referring to 101475400A " a kind of ceramic foam strengthens fiber porous ceramic "), greatly improved the intensity of ceramic foam, but its insulation Poor thermal performance; 2) Compositing airgel with short fibers, that is, adding dispersed inorganic short fibers during the sol process, allowing the fibers to accompany the entire sol-gel process, and finally forming a material through supercritical fluid drying (see 97106652.3 No. "Modified Nano Insulation Material and Its Production Technology"), although its mechanical strength has been improved, it is still difficult to meet the requirements of harsh environments. Furthermore, it uses supercritical fluid for drying, which has high cost, poor safety, and complicated equipment. And the intensity is also low; 3) the composite of fiber prefabricated body and airgel material, sol is impregnated as in the fiber prefabricated body by impregnation process, then by supercritical fluid drying (referring to 200510031952.0 "A kind of airgel composite material and its preparation method"), although the mechanical strength and thermal conductivity have been greatly improved, the strength of the fiber prefabricated body as a skeleton is still much smaller than that of foamed ceramics. In addition, it is dried by supercritical fluid, and the equipment is complicated and dangerous. ,high cost

Method used

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  • A kind of high temperature resistant silica aerogel insulation material
  • A kind of high temperature resistant silica aerogel insulation material

Examples

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preparation example Construction

[0083] The present invention also provides a method for preparing the above-mentioned heat insulating material, which at least includes the following steps:

[0084] (1) Preparation of composite gel: mix silica airgel with nonylphenol polyoxyethylene ether and octylphenol polyoxyethylene ether and stir evenly, adjust the pH value to 5-6 with citric acid after 14-16 hours , and then heated up to 40-60°C, let it stand for 25-30 hours, add isopropanol, and make a composite gel after standing;

[0085] (2) Preparation of foamed rubber particles: mix the rubber composition uniformly in a torque rheometer, then add modified foaming agent, benzoyl peroxide, calcium carbonate, magnesium carbonate, titanium dioxide, Knead N-cumyl-N'-phenyl-p-phenylenediamine and N-phenyl-2-naphthylamine in a kneader at 120-150°C for 10-30 minutes to obtain rubber compound A ; The mixed rubber A is kneaded in an open mill at 160-190° C. for 10-40 minutes, and extruded to obtain foamed rubber particles;...

Embodiment 1

[0090] Example 1 provides a high-temperature-resistant silica airgel thermal insulation material. In parts by weight, the preparation raw materials include at least the following components: 40 parts of silica airgel, 7 parts of alkylphenol polyoxyethylene ether , 16 parts of organic solvent, 180 parts of rubber composition, 7 parts of modified foaming agent, 6 parts of organic peroxide, and 70 parts of auxiliary agent.

[0091] The silica airgel was purchased from Shanghai Ziyi Reagent Factory, and the brand name was 180110132912.

[0092] The alkylphenol polyoxyethylene ethers are nonylphenol polyoxyethylene ethers and octylphenol polyoxyethylene ethers.

[0093] The mass ratio of the nonylphenol polyoxyethylene ether to the octylphenol polyoxyethylene ether is 1:1.

[0094] The nonylphenol polyoxyethylene ether (CAS No. 26027-38-3) was purchased from Changzhou Chiyuan Chemical Co., Ltd.; the octylphenol polyoxyethylene ether (CAS No. 9036-19-5) was purchased from Linyi Na...

Embodiment 2

[0126] Embodiment 2 provides a high-temperature-resistant silica airgel thermal insulation material. The difference from Embodiment 1 is that the raw materials for the preparation of the thermal insulation material include 20 parts of silica airgel, alkylphenol 6 parts of polyoxyethylene ether, 8 parts of organic solvent, 150 parts of rubber composition, 5 parts of modified foaming agent, 4 parts of organic peroxide, and 60 parts of auxiliary agent.

[0127] This embodiment also provides a method for preparing a heat-resistant silica airgel thermal insulation material, the steps of which are the same as those in Embodiment 1.

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Abstract

The invention belongs to the field of heat insulation, and specifically relates to a heat-resistant silica airgel heat insulation material and a preparation method thereof, which at least include the following components in parts by weight: 20-60 parts of silica airgel, alkane 6-8 parts of phenol polyoxyethylene ether, 8-24 parts of organic solvent, 150-200 parts of rubber composition, 5-8 parts of modified foaming agent, 4-8 parts of organic peroxide, 60-80 parts of auxiliary agent share.

Description

technical field [0001] The invention belongs to the field of heat insulation, and in particular relates to a heat-resistant silica airgel heat-insulation material. Background technique [0002] SiO 2 Airgel has a nanoporous structure with a porosity of over 90% and a density as low as 0.001g / cm 3 , is currently the lightest solid material known in the world, and is also recognized as the material with the lowest thermal conductivity. Its thermal conductivity is lower than that of air, so it has a very wide application prospect. [0003] SiO 2 Due to its good thermal insulation performance, airgel is considered to be the best thermal insulation material in the world and the most promising thermal insulation material. However, as an aerogel itself, it has many inherent disadvantages of aerogel. Such as low strength, high brittleness, and high cost restrict its promotion in engineering applications. [0004] Existing solution has following several: 1) short inorganic fiber ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L13/00C08L15/00C08L23/08C08L53/00C08L71/02C08K13/04C08K7/26C08K5/5419C08K5/14C08J9/10
CPCC08J9/0023C08J9/0042C08J9/0061C08J9/0066C08J9/0095C08J9/103C08J9/105C08J9/107C08J2203/04C08J2313/00C08J2315/00C08J2423/08C08J2453/00C08J2471/02
Inventor 唐雪金
Owner JIANGSU DAMAONIU NEW MATERIAL TECH CO LTD