Preparation method for internal-expansion nanoporous thermal-insulation material

A technology of thermal insulation materials and nanopores, which is applied in plastic recycling, artificial filaments made of inorganic raw materials, textiles and papermaking, etc., can solve the problems of high temperature shrinkage, low strength, and low safety factor of thermal insulation materials, and achieve improved heat dissipation area, High thermal conductivity and strong toughness

Inactive Publication Date: 2019-01-15
方建波
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is aimed at the low strength and poor toughness of the current nanoporous thermal insulation materials, and the high temperature shrinkage rate of the thermal insulation materials is relatively large. When applied under high temperature conditions, it brings great risks to the normal operation of the equipment, and the safety factor low, which seriously restricts the application of this material in high-temperature equipment, and provides a preparation method for internally expanded nanoporous thermal insulation materials

Method used

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  • Preparation method for internal-expansion nanoporous thermal-insulation material

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example 1

[0026] In parts by weight, add 70 parts of kaolin, 20 parts of alumina, 10 parts of titanium dioxide, and 20 parts of aluminum phosphate to 400 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid solution with a mass fraction of 20% to the suspension slurry Adjust the pH value of the suspended slurry to 5, heat up to 50°C, and keep it warm for 10 hours to obtain a mixed slurry; grind the bentonite and pass it through a 400-mesh sieve, and then calcinate at a high temperature of 600°C for 2 hours to obtain light-burned bentonite. Soil, 10 parts of light-burned bentonite were mixed through a 400-mesh sieve to obtain mixed clay, and 35 parts of nano-silica airgel, 30 parts of the above-mentioned mixed clay, and 200 parts of water were mixed to obtain nano-silica airgel slurry; The slurry and the nano-silica airgel slurry are mixed at a volume ratio of 4:1, heated to 700°C to obtain a molten feed solution, and modified aluminum silicate fibers a...

example 2

[0028] In parts by weight, add 75 parts of kaolin, 25 parts of alumina, 13 parts of titanium dioxide, and 21 parts of aluminum phosphate to 450 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid solution with a mass fraction of 20% to the suspension slurry Adjust the pH value of the suspended slurry to 5, heat it up to 55°C, and keep it warm for 13 hours to obtain a mixed slurry; grind the bentonite and pass it through a 400-mesh sieve, and then calcinate at a high temperature of 700°C for 3 hours to obtain light-burned bentonite. 25 parts of diatoms Soil, 13 parts of light-burned bentonites were mixed through a 400-mesh sieve to obtain mixed clay, and 47 parts of nano-silica airgel, 35 parts of the above-mentioned mixed clay, and 250 parts of water were mixed to obtain nano-silica airgel slurry; The slurry and the nano-silica airgel slurry are mixed at a volume ratio of 4:1, heated to 750°C to obtain a molten material liquid, and modified ...

example 3

[0030] In parts by weight, add 80 parts of kaolin, 30 parts of alumina, 15 parts of titanium dioxide, and 22 parts of aluminum phosphate to 500 parts of water, stir and disperse to form a suspension slurry, and add a phosphoric acid solution with a mass fraction of 20% to the suspension slurry Adjust the pH value of the suspended slurry to 6, heat up to 60°C, and keep it warm for 15 hours to obtain a mixed slurry; grind the bentonite and pass it through a 400-mesh sieve, and then calcinate at a high temperature of 800°C for 4 hours to obtain light-burned bentonite. Soil, 15 parts of light-burned bentonite were mixed through a 400-mesh sieve to obtain mixed clay, and 50 parts of nano-silica airgel, 40 parts of the above-mentioned mixed clay, and 300 parts of water were mixed to obtain nano-silica airgel slurry; The slurry and the nano-silica airgel slurry are mixed at a volume ratio of 4:1, heated to 800°C to obtain a molten material liquid, and modified aluminum silicate fibers...

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Abstract

The invention specifically relates to a preparation method for an internal-expansion nanoporous thermal-insulation material, belonging to the technical field of preparation of thermal-insulation materials. The preparation method of the invention comprises the following steps: preparing mixed clay from diatomite and bentonite, and mixing the mixed clay and a nanometer silica aerogel to prepare nanometer silica aerogel slurry; heating mixed slurry and the nanometer silica aerogel slurry to obtain molten material liquid; subjecting zirconium boride powder, a concentrate and the like to high-speeddispersion so as to obtain a nanometer reinforced emulsion; pouring the nanometer reinforced emulsion at first and then performing filling with a high-temperature-resistant inorganic filler; and carrying out pressure filtration and drying so as to obtain the internal-expansion nanoporous thermal-insulation material. According to the invention, expanded graphite has cooling effect on the inner layer of the thermal-insulation material and also plays reinforcing and protective roles; and a zirconium dioxide-silicon dioxide film formed by a reaction further improves the compressive strength of the thermal-insulation material at a high temperature, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of heat insulation material preparation, and in particular relates to a preparation method of internally expanded nanoporous heat insulation material. Background technique [0002] With the development of social economy and the improvement of people's awareness of energy conservation, energy conservation has become the focus of industrial development. Thermal insulation material refers to the material that can block the transfer of heat flow, also known as thermal insulation material. They are widely used in building envelope or thermal equipment, materials or material composites that resist heat flow transfer, including both thermal insulation materials and cold insulation materials. On the one hand, thermal insulation materials meet the thermal environment of building space or thermal equipment, and on the other hand, they also save energy. Therefore, some countries regard thermal insulation materials as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/80D06M11/79D06M11/45D06M11/74D06M15/643D01F9/08C08J11/12C08L83/04
CPCC08J11/12C08J2383/04D01F9/08D06M11/45D06M11/74D06M11/79D06M11/80D06M15/643Y02W30/62
Inventor 方建波章红英赵金晶
Owner 方建波
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