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Graphene-containing sound absorption and insulation material as well as preparation method and application thereof

A technology of sound absorption and insulation and graphene, which is applied in the field of sound absorption and insulation materials containing graphene and its preparation, and achieves the effects of simple process flow, improved sound absorption and insulation performance, and mild reaction conditions.

Inactive Publication Date: 2019-12-27
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The case of improving the sound absorption performance of polyurethane foam by adding graphene has not been reported

Method used

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  • Graphene-containing sound absorption and insulation material as well as preparation method and application thereof
  • Graphene-containing sound absorption and insulation material as well as preparation method and application thereof
  • Graphene-containing sound absorption and insulation material as well as preparation method and application thereof

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preparation example Construction

[0026] The preparation of graphene powder is a prior art, and will not be repeated in the present invention. It is sealed and stored in a dry environment, and is dried at a temperature of 40-60°C before use.

[0027] The oxygen content of the graphene powder is 1~16wt%, and the specific surface area of ​​the graphene powder is 150~500m 2 / g, its value should be adjusted reasonably according to the specific situation.

[0028] The multi-component polyether includes 20~70 parts by weight of polyether polyol, 20~70 parts by weight of polymer polyol, 0.5~5 parts by weight of crosslinking agent, 2~6 parts by weight of foaming agent, 0.5~70 parts by weight of 10 parts by weight of the cell opener and 0.25 to 3 parts by weight of the catalyst, this multi-component polyether is a semi-finished product in the preparation process, the adjustment of its proportioning and the preparation method are all existing conventional techniques, and will not be carried out in the present invention....

Embodiment 1

[0029] Embodiment 1, a sound-absorbing and sound-insulating material containing graphene, comprising 49.5 parts by weight of multi-component polyether, 49.5 parts by weight of diphenylmethane diisocyanate and 1 part by weight of graphene powder.

[0030] The preparation method of the described sound-absorbing and insulating material containing graphene comprises the steps:

[0031] In step 1, 1 part by weight of graphene powder is dried in a vacuum drying oven at a drying temperature of 50°C.

[0032] Clean the batching bucket, weigh 49.5 parts by weight of multi-component polyether and pour it into the batching bucket, set the mixer speed to 500rpm, and after the rotation speed is uniform, slowly and repeatedly pour the dried graphene powder. After all the graphene powder is added, gradually increase the speed of the mixer to 1000rpm, and after the speed is stable, continue stirring for 2-3min to obtain a mixture containing graphene powder. The graphene powder is added at a ...

Embodiment 2

[0036] Embodiment two, a kind of sound-absorbing and insulating material containing graphene, comprises the multi-component polyether of 49.9 parts by weight, the diphenylmethane diisocyanate of 49.9 parts by weight and the graphene powder of 0.2 parts by weight, its preparation method Process parameter is identical with embodiment one.

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Abstract

The present invention discloses a graphene-containing sound absorption and insulation material, which is prepared from a multi-component polyether, isocyanate and graphene powder, wherein the weight ratio of the multi-component polyether to the isocyanate is 1:0.9-1.2, and the mass fraction of the graphene powder is 0.2-1 wt%. The sound absorption and insulation performance of the material can beimproved. The invention further discloses a preparation method and application of the sound absorption and insulation material containing graphene, the technological process is simple, reaction conditions are mild, forming is easy, and the sound absorption and insulation material is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing and insulating materials for automobiles, in particular to a sound-absorbing and insulating material containing graphene, a preparation method and application thereof. Background technique [0002] Polyurethane foam (referred to as PU) is widely used in automobiles, especially in the field of automobile sound insulation. In order to reduce the noise inside the car and improve the driving experience, it is necessary to use a large amount of polyurethane foam in the engine compartment, floor, ceiling and other areas of the car, such as Engine decorative cover, front wall panel sound insulation pad, etc. [0003] The principle of polyurethane foam preparation is that multi-component polyether with hydroxyl groups and isocyanate with isocyanate groups react under certain temperature and catalyst conditions, and its performance can be improved by adding functional materials during the reaction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08K3/04C08L75/08C08G101/00
CPCC08G18/48C08G2101/00C08G2350/00C08K2201/016C08K3/042C08L75/08
Inventor 谭召召孙勇张金生王志白冯刚杨修宝麻晓伟
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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