Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of loudspeaker diaphragm based on graphene and polyetherimide
  • Preparation method of loudspeaker diaphragm based on graphene and polyetherimide

Examples

Experimental program
Comparison scheme
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 ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com