A kind of sound-absorbing microsphere material and preparation method thereof

A technology of microspheres and silane coupling agents, which is applied in the field of loudspeakers, can solve the problems of insufficient bonding effect of zeolite particles, and achieve the effects of improving sound absorption, improving adhesion, and reducing usage

Active Publication Date: 2020-12-22
深圳市大分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] An object of the embodiments of the present invention is to provide a sound-absorbing microsphere material and its preparation method, which aims to solve the technical problem of insufficient bonding effect of zeolite particles in the existing sound-absorbing microsphere material

Method used

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  • A kind of sound-absorbing microsphere material and preparation method thereof
  • A kind of sound-absorbing microsphere material and preparation method thereof
  • A kind of sound-absorbing microsphere material and preparation method thereof

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preparation example Construction

[0025] see figure 1 , figure 1 It is a schematic flow chart of a method for preparing a sound-absorbing microsphere material provided by an embodiment of the present invention, as figure 1 As shown, the method 100 includes:

[0026] Step 10, adding the baked zeolite particles into the silane coupling agent solution, heating and stirring to obtain surface-modified zeolite particles.

Embodiment 1

[0054] 1) Calcinate the dried zeolite raw material particles (the zeolite structure is FER, and the average pore diameter of micropores is about 0.49nm) at 800°C for 12h, and the hydroxyl density on the surface of the prepared zeolite particles is: 0.6-0.8OH / nm 2 .

[0055] 2) According to the mass ratio, weigh 90 parts of anhydrous methanol, 5 parts of deionized water and 5 parts of γ-(methacryloyloxy)propyltrimethoxy (KH570) and mix evenly, and mechanically stir at 1000rpm at room temperature for 1h , to hydrolyze part of the siloxane coupling agent.

[0056] 3) Add 30 parts of the calcined zeolite particles prepared in the above steps to the solution after hydrolyzing part of the siloxane coupling agent, and react with mechanical stirring at 1000 rpm for 3 hours in a constant temperature water bath at 50°C. The resulting solid was filtered, then ultrasonically washed with 150 parts of anhydrous methanol; after washing three times, it was dried at 120° C. for 4 hours to obt...

Embodiment 2

[0061] 1) Calcinate the dried zeolite raw material particles (the zeolite structure is FER, and the average pore diameter of micropores is about 0.49nm) at 700°C for 12h, and the hydroxyl density on the surface of the prepared zeolite particles is: 1.0-2.0OH / nm 2 .

[0062] 2) According to the mass ratio, weigh 90 parts of anhydrous methanol, 5 parts of deionized water and 5 parts of γ-aminopropyltriethoxy (KH550) and mix them evenly, and mechanically stir at 1000 rpm for 1 hour at room temperature to make part of the silica Hydrolysis of the coupling agent.

[0063] 3) Add 30 parts of the calcined zeolite particles prepared in the above steps to the solution after hydrolyzing part of the siloxane coupling agent, and react with mechanical stirring at 1500 rpm for 2 hours under the condition of a constant temperature water bath at 60°C. The obtained solid was filtered, and then ultrasonically washed with 150 parts of absolute ethanol; after washing three times, it was dried at...

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Abstract

The invention relates to the technical field of a loudspeaker, in particular to a sound absorption microsphere material and a preparation method thereof. The preparation method comprises the followingsteps of adding baked zeolite particles into a silane coupling agent solution; performing heating and stirring to obtain surface modified zeolite particles, wherein the surfaces of the baked zeoliteparticles have the preset hydroxyl density; stirring the surface modified zeolite particles and bonding agent emulsion to obtain mixed slurry; performing granulation and sieving on the mixed slurry toobtain a sound absorption microsphere material with the target particle diameter. The silane coupling agent is used for performing surface modification on porous zeolite raw material particles; the hydroxyl density on the surfaces of the zeolite raw material particles is controlled, so that the silane grafting rate on the surfaces of the modified zeolite particles is controlled; the material sound absorption performance reduction due to the blockage of a great number of micropore structures can be prevented.

Description

【Technical field】 [0001] The invention relates to the technical field of loudspeakers, in particular to a sound-absorbing microsphere material and a preparation method thereof. 【Background technique】 [0002] The current sound-absorbing microsphere materials for loudspeakers are mainly obtained by bonding and molding a plurality of zeolite particles. After the sound-absorbing microsphere material is prepared in this way, the sound-absorbing microsphere material can be filled into the rear acoustic cavity of the inner cavity of the speaker module. When the speaker is working, the cavity will vibrate strongly. In the long run, the outer zeolite particles of the sound-absorbing microsphere material will fall off and the whole ball will be broken, which will affect the sound-absorbing effect and service life of the speaker. [0003] The existing solutions are generally: by increasing the content of the adhesive or selecting an adhesive with a low glass transition temperature to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/14C08L75/04C08L63/00C08K9/06C08K7/26
CPCC08K7/26C08K9/06C08L25/14C08L75/04C08L63/00
Inventor 不公告发明人
Owner 深圳市大分子科技有限公司
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