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A thermal insulation felt with phase change function and preparation method thereof

A phase change and thermal insulation technology, applied in chemical instruments and methods, materials for heat exchange, fiber processing, etc., can solve the problems affecting the performance and safety performance of new energy vehicles, short thermal insulation time, and decreased thermal insulation performance. Achieve the effect of easy automated production, improved performance and safety performance, and long service life

Active Publication Date: 2022-03-15
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, during the driving process of the car, high-frequency vibrations will occur due to reasons such as pauses and starts.
The traditional airgel blanket has low structural strength, and will drop powder and generate dust under high-frequency vibration, which will cause a decline in thermal insulation performance over time, affecting the performance and safety performance of new energy vehicles
In addition, the simple use of airgel blanket can only insulate heat by delaying heat conduction, and its heat insulation time is not long
If the new energy vehicle is driven for a long time or the battery fails, excessive heat accumulation will also occur, causing the risk of thermal runaway

Method used

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  • A thermal insulation felt with phase change function and preparation method thereof
  • A thermal insulation felt with phase change function and preparation method thereof
  • A thermal insulation felt with phase change function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Thermal insulation felt with phase change function such as figure 1 As shown, it includes an airgel felt 10 and a phase change coating 20 coated on the upper surface and / or lower surface; the airgel felt 10 is mainly composed of a fiber felt 31, and is fully wrapped or half wrapped by a polymer 41 The airgel particles 40 are inserted into the pores of the fiber mat 31; the polymer 41 contains a photosensitive substance.

[0057] The fiber mat is specifically one or more of glass wool, high silica glass fiber, chopped glass fiber, pre-oxidized silk fiber, asbestos fiber and ceramic fiber mixed in any proportion; the bulk density is 10~180kg / m 3 ;

[0058] The airgel particle is a nano particle containing a Si-O-Si network structure, and its primary particle diameter is 1-20nm.

[0059] The thickness of the phase change coating is 0.1-3mm.

[0060] image 3 It is an airgel felt photo, Figure 4 It is a photo of the thermal insulation blanket with phase change functio...

Embodiment 2

[0062] The preparation steps of the thermal insulation felt with phase change function are as follows:

[0063] (1) Sol:

[0064] a. Mix tetraethoxysilane, water and absolute ethanol at a molar ratio of 1:5:50, then add hydrochloric acid / absolute ethanol mixture, stir for 4 hours, adjust the pH of the solution to 3.5, and make it fully hydrolyzed, Prepare sol liquid;

[0065] b. Mix GP-5102 water-soluble polyurethane acrylate (purchased from Shenzhen Youyang Technology Co., Ltd.) and the sol liquid prepared in the above step (1) a according to the mass ratio of 6:100, and then add 1173 photoinitiator, Stir for 2 hours; the mass ratio of 1173 photoinitiator to GP-5102 water-soluble polyurethane acrylate is 1:10;

[0066] c. Add NaOH / absolute ethanol mixed solution to adjust the pH to 7.5 to form a photosensitive sol liquid;

[0067] (2) Preparation of gel felt: Unroll the high-silica needle-punched felt to ensure that each part of the high-silica needle-punched felt is immer...

Embodiment 3

[0089] The preparation steps of the thermal insulation felt with phase change function are as follows:

[0090] (1) Sol:

[0091]a. Mix dimethylethoxysilane, water and absolute ethanol according to the molar ratio of 1:6:80, then add oxalic acid / absolute ethanol mixture, stir for 1.5h, adjust the pH of the solution to 4.0, so that Fully hydrolyzed to obtain a sol liquid;

[0092] b. Mix GP-5120 water-soluble polyurethane acrylate (purchased from Shenzhen Youyang Technology Co., Ltd.) and the sol liquid prepared in the above step (1) a according to the mass ratio of 8:100, and then add 1173 photoinitiator, Stir for 2 hours; the mass ratio of 1173 photoinitiator to GP-5120 water-soluble polyurethane acrylate is 1:15;

[0093] c. Add KOH / dehydrated ethanol mixed solution to adjust the pH to 8.0 to form a photosensitive sol liquid;

[0094] (2) Preparation of gel mat: Unroll the pre-oxidized silk fiber mat to ensure that each part of the pre-oxidized silk fiber mat is immersed ...

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Abstract

A thermal insulation felt with phase change function and a preparation method thereof belong to the technical field of thermal insulation materials. It includes an airgel felt and a phase change coating coated on the upper surface and / or lower surface; the airgel felt is mainly composed of a fiber felt, and the airgel particles fully wrapped or half wrapped by the polymer are interspersed in the fiber Inside the pores of the felt; the photosensitive substance is contained in the polymer. The thermal insulation blanket with phase change function of the invention is prepared through the steps of sol preparation, gel felt preparation, photocuring, drying, preparation of expanded perlite phase change material, preparation and compounding of phase change coating and the like. The thermal insulation felt with phase change function of the present invention greatly improves the disadvantages of airgel particles such as weak adhesion, fragility and powder drop, etc., and uses the surface coating technology of phase change coating to reduce the airgel particle's resistance to high temperature. damage and have a longer service life.

Description

technical field [0001] The invention relates to a thermal insulation blanket with a phase change function and a preparation method thereof, which is especially suitable for thermal insulation in the fields of new energy vehicles, textiles and clothing, construction and photovoltaics, and belongs to the technical field of thermal insulation materials. Background technique [0002] With the oil crisis and environmental pollution becoming more and more serious, the energy consumption and tail gas pollution of automobiles are getting more and more attention. In order to reduce the energy consumption of traditional fuel vehicles and the harm to the environment, all countries in the world have successively increased the intensity of energy conservation and emission reduction of vehicles, and regard new energy vehicles as a new direction of automobile development. [0003] Lithium-ion batteries are the main power source of new energy vehicles, which affect the performance and safet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06N3/00D06M11/79D06M11/38D06M15/564C09K5/06
Inventor 李承东
Owner JIANGNAN UNIV
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