Preparation method of loudspeaker diaphragm based on graphene and polyetherimide

A polyetherimide and graphene technology, applied in sensors, electrical components, etc., can solve the problems of diaphragm strength, electroacoustic efficiency and difficult frequency response

Inactive Publication Date: 2017-12-08
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, some properties such as the strength of the diaphragm, electro-acoustic efficiency, and frequency response are often difficult to reconcile

Method used

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  • Preparation method of loudspeaker diaphragm based on graphene and polyetherimide
  • Preparation method of loudspeaker diaphragm based on graphene and polyetherimide

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Effect test

Embodiment 1

[0021] Such as figure 1 and figure 2 Shown, the preparation method of the loudspeaker diaphragm based on graphene and polyetherimide (PEI) of embodiment 1 comprises the steps:

[0022] (1) Disperse the graphene material in ethylene glycol to form a mixed solution of graphene and ethylene glycol; melt the polymer polyetherimide into a PEI solution at a high temperature of 340°C to 415°C;

[0023] (2) Add the mixed solution of graphene and ethylene glycol into the PEI solution and stir and mix thoroughly. The ethylene glycol decomposes and volatilizes under the condition of 340°C to 415°C, and the high molecular polymer polyetherimide (PEI) is mixed with Miscellaneous graphene material, finally form PEI-graphene material mixed slurry, the content of PEI material in the mixed slurry is 65%, the content of graphene material is 35%.

[0024] (3) The PEI-graphene material mixed slurry is cooled and solidified and pressed into a composite diaphragm by pouring method, that is, the ...

Embodiment 2

[0026] Such as figure 1 Shown, the preparation method of the loudspeaker diaphragm based on graphene and polyetherimide (PEI) of embodiment 2 comprises the steps:

[0027] (1) Disperse the graphene material in ethylene glycol to form a mixed solution of graphene and ethylene glycol; melt the solid carbon fiber reinforced PEI material at 340°C to 415°C to form a PEI solution;

[0028] (2) Add the mixed solution of graphene and ethylene glycol into the PEI solution and stir and mix thoroughly. The ethylene glycol decomposes and volatilizes under the condition of 340°C to 415°C. The carbon fiber-reinforced PEI material is used as the base material to dope the graphene material, and finally formed PEI-graphene material mixed slurry, the content of PEI material in the mixed slurry is 85%, and the content of graphene material is 15%.

[0029] (3) Cool and solidify the PEI-graphene material mixed slurry and press it into a composite diaphragm by pouring method, specifically: inject ...

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Abstract

The present invention discloses a preparation method of loudspeaker diaphragm based on graphene and polyetherimide. High-molecular polymer polyetherimide is taken as base materials to dope with graphene materials through the high-temperature fusion method to form PEI-graphene material mixed slurry, and a pouring method is employed to perform cooling and solidification of the mixed slurry and perform compaction so as to composite a loudspeaker diaphragm. The prepared composite diaphragm has high electroacoustic efficiency and high robustness, is simple in preparing technology and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of loudspeaker diaphragm manufacturing, in particular to a method for preparing a loudspeaker diaphragm based on graphene and polyetherimide (PEI). Background technique [0002] Loudspeakers are indispensable acoustic components for many electronic information products (mobile phones, TVs, computers, earphones, speakers, etc.); they are the direct interaction interface between people and products. Its performance directly affects people's satisfaction with product performance. With the development of products in the direction of thin and light, this requires the development of speakers in the direction of thin and light and high sound quality. [0003] The diaphragm is the core component of the speaker. Its design, manufacture, and material directly affect the sound effect, which in turn affects the performance and market competitiveness of related electronic products. In order to improve the sound effect,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R31/00
CPCH04R31/003H04R2231/001
Inventor 伍守豪余洋
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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