Bionic lamellar thermal insulation material

A heat insulation material and bionic layer technology, applied in the field of refractory materials, can solve the problems of reducing heat convection and heat radiation, limiting heat conduction, and inability to use, so as to reduce thermal conductivity and thickness of heat insulation layer, reduce heat conduction, and reduce sintering shrinkage effect

Active Publication Date: 2021-02-02
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The patent No. ZL 201410389034.4 "a composite layered structure thermal insulation material with high thermal insulation efficiency" and the patent No. ZL 201520257206.2 "a layered structure of thermal insulation material" are made of high reflectivity material aluminum film reflective layer and Low thermal conductivity materials are alternately arranged and compounded. This type of material can effectively limit heat conduction, and can effectively reduce heat convection and heat radiation, thereby obtaining a high heat preservation effect, but it is also limited to low-temperature fields such as refrigeration and building materials. can not be used under
The patent No. ZL 20161204383.X, Ma Chengliang, Lv Guiying and others invented "a vacuum heat-insulating refractory product and its preparation method", which is composed of a core material and a high-barrier film wrapped around the core material. Packaging is prepared as a vacuum insulation material, which can be used at a temperature of 500~1200°C, has low thermal conductivity, and can maintain a vacuum structure, but it is limited by the preparation of packaging materials

Method used

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  • Bionic lamellar thermal insulation material
  • Bionic lamellar thermal insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the bionic layered thermal insulation material of this embodiment is as follows: Weigh alumina micropowder (86% by weight, particle size is 0.03 mm), aluminum silicate fiber (10% by weight), starch (10% by weight 1 %) and BBP (3% by weight), put them all into a mixer, stir at a speed of 1000 r / min for 30 min, mix thoroughly to obtain a slurry with a certain viscosity, and then mix well Thin-layer units of the slurry were prepared using the spin-coating method with a thickness of 2 mm.

[0028] The prepared thin-layer units are bonded and laminated, and a silica sol adhesive is added between the units to obtain a green body. Dry the obtained body in a drying oven at 100 °C for 12 hours to obtain a bionic layered thermal insulation material 1 with a thickness of 40 mm and a layered structure (the same structure as the bark of the American redwood tree, both of which are layered structure, such as figure 2 shown), including 20 thin-layer units ...

Embodiment 2

[0031] The preparation method of the biomimetic layered thermal insulation material in this example is: weigh the mixture of fumed silica and alumina micropowder (the weight ratio of the two is 1:1, the total weight ratio is 88%, and the particle size is 0.04 mm) , mullite fiber (9% by weight), silicon carbide (1% by weight) and PEG-400 (2% by weight), put them all into a mixer and set the temperature at 1000 r / min Stir at a high speed for 30 min, mix thoroughly to obtain a slurry with a certain viscosity, and then use the scraping method to prepare a thin-layer unit with a thickness of 3 mm.

[0032] The prepared thin-layer units are bonded and laminated, and polyvinylpyrrolidone adhesive is added between the units to obtain a green body. The green body obtained was dried in a drying oven at 90°C for 12 hours to obtain a biomimetic layered thermal insulation material 1 with a thickness of 45 mm and a layered structure including 15 thin-layer units 2 .

[0033] Then the therm...

Embodiment 3

[0035] The preparation method of the biomimetic layered thermal insulation material of this embodiment is as follows: Weigh alumina micropowder (90% by weight, particle size is 0.03mm), zirconia fiber (5% by weight), silicon carbide ( 1 %) and BBP (4% by weight), put them all into a mixer, stir at a speed of 1000 r / min for 30 min, mix thoroughly to obtain a slurry with a certain viscosity, and then mix well Thin-layer units of the slurry were prepared using the spin-coating method with a thickness of 2 mm.

[0036] The prepared thin-layer units are bonded and laminated, and a silica sol adhesive is added between the units to obtain a green body. The obtained body was dried in a drying oven at 150 °C for 12 hours to obtain a biomimetic layered thermal insulation material 1 with a thickness of 40 mm and a layered structure including 20 thin-layer units 2 .

[0037] Then the thermal conductivity of the obtained product is tested, which can be used in the temperature range below ...

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Abstract

The invention discloses a bionic lamellar thermal insulation material which simulates a fireproof, corrosion-resistant and excellent-thermal-insulation-performance American redwood bark multi-thin-layer laminated and thin-layer microporous structure, adopts low-thermal-conductivity microporous powder as a main raw material, and is supplemented with a reinforcing agent, a plasticizer and a pore-forming agent to form a microporous thin-layer unit, and the thin-layer units are boned to prepare the lamellar thermal insulation material. The heat conductivity coefficient of the finished product is as low as 0.02-0.05 W / m.k, and the finished product is good in heat-insulating property and mechanical property, can be used within the temperature range of 1000 DEG C or below, has better heat-insulating and energy-saving effects and toughness compared with common heat-insulating materials, remarkably reduces the thickness of the heat-insulating layer, and is suitable for large-scale popularization and application. The material can be widely applied to the fields of industrial kilns, thermotechnical devices, heat preservation pipelines and the like.

Description

technical field [0001] The invention discloses a bionic layered thermal insulation material, which belongs to the technical field of refractory materials. Background technique [0002] At present, with the rapid development of China's economy, my country's energy supply situation is not optimistic. Among them, the largest energy consumption is industrial energy consumption. In 2015, industrial energy consumption accounted for 73% of the total social energy consumption, and the proportion increased year by year. In response to the country's basic national policy of saving energy and protecting the environment, it is imperative to reduce the loss of energy and resources in high-temperature industries and protect the environment. Therefore, the research and development of new high-temperature insulation materials to further save energy consumption is of great significance for high-energy-consuming industries, and it is also in line with the national strategic goal of sustainab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B7/12B32B37/12B32B38/16C04B26/28C04B26/10C04B30/02C04B38/08
CPCB32B9/002B32B9/04B32B7/12B32B37/12B32B38/164C04B26/28C04B26/10C04B30/02B32B2262/10B32B2307/304B32B2307/306B32B2307/558C04B2111/00612C04B2201/30C04B2111/00482C04B14/303C04B14/4656C04B24/045C04B38/085C04B14/064C04B14/324C04B14/4637C04B14/022C04B14/328C04B38/02C04B38/009C04B28/24C04B2111/28B32B2264/102B32B2255/26B32B2264/1023B32B2255/10B32B2264/1021B32B2307/418B32B2307/732B32B5/16B32B2264/12B32B2264/303C04B26/04C04B14/06C04B38/0054C04B14/305C04B14/306C04B22/106C04B24/32C04B24/38B32B7/027B32B2264/1027B32B2264/1024B32B2305/026C04B20/008C04B24/023
Inventor 马成良李祥王世界邢益强杜浩然靳亲国原会雨
Owner ZHENGZHOU UNIV
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