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Organic-fiber reinforced organic-aerogel heat-insulating material and preparation method thereof

A technology for thermal insulation materials and organic fibers, which is applied in the field of organic fiber reinforced organic aerogel thermal insulation materials and their preparation, can solve the problems of hidden safety hazards, high equipment costs and operating costs, and achieve improved strength, excellent thermal insulation performance, The effect of low gas heat transfer

Active Publication Date: 2013-09-25
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned supercritical drying process involves high-pressure equipment to varying degrees, the equipment cost and operating cost are high, and there are certain safety hazards

Method used

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  • Organic-fiber reinforced organic-aerogel heat-insulating material and preparation method thereof
  • Organic-fiber reinforced organic-aerogel heat-insulating material and preparation method thereof
  • Organic-fiber reinforced organic-aerogel heat-insulating material and preparation method thereof

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Effect test

Embodiment 1

[0034] In this example, the organic fiber-reinforced organic airgel thermal insulation material product reinforcement is 26 μm polyacrylonitrile pre-oxidized silk fiber, the matrix is ​​organic resorcinol-formaldehyde airgel, and the density is 0.473g / cm 3 .

[0035] According to the molar ratio of raw materials resorcinol: formaldehyde: sodium carbonate: water = 1:2:0.001:16, prepare a solution of about 5L, stir for 30 minutes, then let it stand at room temperature for 1 day, and then vacuum impregnate the polyacrylonitrile base Pre-oxidized fiber preform, fiber preform apparent density 0.16g / cm 3 , the vacuum degree is 0.0095MPa when vacuuming, then put it in a 50°C water bath for 1 day, then raise the temperature of the water bath to 95°C, keep the temperature constant for 2 days, and then immerse the gel / fiber composite in 3 times its volume of ethanol ( 99.7%), continue to 50°C water bath, replace ethanol once every 24 hours, and replace 3 times in total, then take it ou...

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Abstract

The invention relates to an organic-fiber reinforced organic-aerogel heat-insulating material and a preparation method thereof, wherein the basal body of the organic-fiber reinforced organic-aerogel heat-insulating material is organic phenol-aldehyde aerogel, a reinforced body is organic pre-oxidized fibers, and the density is 0.3 to 0.6g / cm<3>. A normal-pressure semi-closed drying method is adopted for preparation. Compared with a traditional organic-foam heat-insulating material, the material disclosed by the invention has the advantages of high strength, low heat conductivity, flame retardance and the like; and compared with an inorganic-fiber reinforced inorganic oxide-aerogel composite material, the material disclosed by the invention does not have the side effects of dust pollution,harm and irritability to the skin of a human body, stimulation to a respiratory tract and the like, so that the material is environment-friendly and safe. The material disclosed by the invention is applicable to occasions with the characteristic of having a high-strength requirement on the heat-insulating material at the temperature of minus 100 to 110 DEG C and is an ideal heat-insulating material for building house-decoration industries.

Description

technical field [0001] The invention relates to an airgel heat insulation material and a preparation method thereof, in particular to an organic fiber reinforced organic airgel heat insulation material and a preparation method thereof. Background technique [0002] Airgel has extremely low thermal conductivity, is considered to be the solid material with the best thermal insulation performance, and is a high-performance thermal insulation material with very promising application prospects. However, the application of existing organic airgel as a high-efficiency thermal insulation material has received many restrictions. There are two main reasons: (1) high brittleness, which makes it difficult to shape and prepare large thermal insulation materials; (2) long production cycle, high cost. [0003] At present, the product state of organic airgel is basically pure airgel, without reinforcing fibers, and has no application in heat insulation. As disclosed in the patent document...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/10C04B16/06
Inventor 冯军宗冯坚姜勇刚张长瑞
Owner NAT UNIV OF DEFENSE TECH
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