Composite heat-insulating material and preparation method thereof

A heat insulation material and raw material technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of unsatisfactory heat insulation performance and long drying time, and achieve low heat insulation coefficient, high production efficiency, and high tensile strength. Effect

Inactive Publication Date: 2012-02-15
张永武
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention patent application document with the application number of 200810138341.x and the publication date of January 20, 2010 discloses an airgel thermal insulation composite material and its preparation method, which uses ethyl orthosilicate as the silicon source to prepare silicon sol, adding porous SiO to silica sol 2 Powder, titanium dioxide, aluminum silicate fibers and fillers are molded by casting process and dried by normal pressure. The thermal conductivity of the obtained airgel thermal insulation composite material is above 0.04W / m·K (normal temperature), and the thermal insulation performance of the material is Still not ideal and takes longer to dry

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  • Composite heat-insulating material and preparation method thereof

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Embodiment 1

[0032] Raw material weighing: SiO 2 Airgel (average particle size 5nm, 80% (volume) pore size less than 25nm, Shanxi Tianyi Nano Material Co., Ltd.) 85kg, diatomaceous earth 15kg, aluminum silicate fiber 120kg, sepiolite 110kg, brucite 50kg, asbestos 80kg of fiber, 50kg of perlite, 10kg of diethyloctyl sodium sulfosuccinate, 8kg of polyvinyl alcohol, and 800kg of clear water.

[0033] Preparation method: first add 10kg of diethyloctyl sodium succinate to 800kg of clear water to dilute, then put 120kg of aluminum silicate fiber and 80kg of asbestos fiber into it and soak for 10 minutes; then, mix the obtained mixture with Add other raw materials together into the hexagonal mixing container at one time and stir slightly (control the speed at 120 rpm to prevent the fibers from being chopped at too high a speed), stop stirring after 3-5 minutes; let stand for 10 minutes to get a coarse slurry material; start stirring again, control the speed of 300 rpm, and stop stirring after 25...

Embodiment 2

[0035] Raw material weighing: SiO 2 Airgel (average particle diameter 7.6nm, 80% (volume) pore diameter is less than 25nm, Shanxi Tianyi Nano Material Co., Ltd.) 50kg, diatomaceous earth 30kg, bentonite 2kg, aluminum silicate fiber 180kg, sepiolite 70kg, water magnesium Stone 25kg, asbestos fiber 100kg, perlite 30kg, sodium tripolyphosphate 30kg, polyvinyl alcohol 4kg, clear water 900kg.

[0036]Preparation method: First add 30kg of sodium tripolyphosphate to 900kg of clear water to dilute, then put 180kg of aluminum silicate fiber and 100kg of asbestos fiber into it and soak for 10 minutes; add the resulting mixture together with other materials for six Stir slightly in the angular stirring container (control the speed at 100 rpm, in case the fiber is chopped at too high speed), stop stirring after 3-5 minutes, and start stirring again after standing for 10 minutes, control the speed at 200 rpm, and stop stirring after 30 minutes to make the slurry fine and the air bubbles f...

Embodiment 3

[0038] Raw material weighing: SiO 2 Airgel (average particle size 10nm, 80% (volume) pore size less than 25nm, Shanxi Tianyi Nano Material Co., Ltd.) 15kg, diatomaceous earth 140kg, bentonite 30kg, aluminum silicate fiber 140kg, sepiolite 20kg, asbestos fiber 95kg , perlite 40kg, sodium lauryl sulfate 20kg, water glass 8kg, polyvinyl alcohol 2kg, sodium cetylsulfonate 0.2kg, clear water 800kg.

[0039] Preparation method: first add 20kg of sodium lauryl sulfate to 800kg of clear water to dilute, then put 140kg of aluminum silicate fiber and 95kg of asbestos fiber into it and soak for 10 minutes; mix the resulting mixture with other materials once Add it into a hexagonal mixing container and stir slightly (control the speed at 80 rpm to prevent the fibers from being chopped up if the speed is too high), stop stirring after 3-5 minutes, and start stirring again after standing for 10 minutes to control the speed At 100 rpm, stop stirring after 35 minutes to make the slurry fine ...

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Abstract

The invention relates to a composite heat-insulating material, comprising the following ingredients: 0.4-10 wt% of sepiolite, 0-5 wt% of brucite, 0-15 wt% of alumina silicate fiber, 5-10 wt% of asbestos fiber, 0.5-8 wt% of aerogel, 0-12 wt% of diatomite, 0-3 wt% of bentonite, 1-5 wt% of perlite, 0.5-5 wt% of dispersant, 0.1-1 wt% of polyvinyl alcohol, 0-1 wt% of soluble glass, 0-0.015 wt% of sodium cetanesulfonate, and the balance consisting of clear water. The invention also discloses a preparation method of the composite heat-insulating material. The composite heat-insulating material disclosed herein has low heat-insulating coefficient, good flexibility, and high tensile strength, and is difficult to pulverization. In addition, the method has the advantages of simple process, high production efficiency, and low energy consumption.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and in particular relates to a composite thermal insulation material and a preparation method thereof. Background technique [0002] The materials used for thermal insulation in the prior art are generally rock wool, glass fiber, or thermal insulation materials made of fly ash, etc. These materials are easily pulverized during use, and the mechanical strength of thermal insulation materials is low. The service life is short; in addition, there are insulation materials made of magnesium silicate, aluminum silicate fiber or rare earth mineral fiber as the main material. The formula of each component for making this type of insulation material is unreasonable and the preparation process is complicated. For example, the patent No. is ZL91111471.8, and the disclosure date is August 12, 1992. The invention patent specification discloses a composite silicate thermal insulation p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B28/26C04B14/38C04B14/04
Inventor 张永武
Owner 张永武
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