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

A kind of loudspeaker diaphragm material and preparation method thereof

A membrane material and loudspeaker technology, applied in the manufacture of rayon, single-component fibroin artificial filament, fiber chemical characteristics, etc., can solve the problems of complex preparation process, insufficient strength, and insufficient source of materials, and achieve uniform distribution , Excellent damping and vibration reduction performance, solvent recyclable effect

Active Publication Date: 2017-05-31
NANTONG TEXTILE & SILK IND TECH RES INST
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Publication number is CN 101720053 A Chinese invention patent "speaker film made of non-wood fiber and its manufacturing process", by making grass fiber, bast fiber and cotton fiber into slurry in a certain proportion, dehydration deposition, and then heat Press molding to make the speaker diaphragm, the obvious defect of the diaphragm is insufficient strength
Publication No. is CN 104135708 A Chinese invention patent "the preparation method of pearl clam nanopowder and loudspeaker vibrating film", prepare the pearl clam nanopowder by mechanical milling and airflow milling and add to A loudspeaker diaphragm is made from the base pulp made of cotton fluff and bast fiber. The preparation process of the raw materials is complicated, especially the preparation of the nacre nano-powder of Tridacna japonica, and the sources of the materials are not extensive enough.

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
  • A kind of loudspeaker diaphragm material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of silk fibroin film: after silk degumming, dissolve in 9.3 mol / L lithium bromide solution, the mass concentration of silk fibroin is 20%, filter the obtained solution, dialyze, and then centrifuge with a centrifuge to obtain pure Silk fibroin solution, the mass concentration of which is between 6% and 7%, is diluted with deionized water until the mass concentration of silk fibroin is 3%, and the evenly stirred silk fibroin solution is pressed into a petri dish with a diameter of 9 cm with a syringe , inject 15 mL of the solution into each Petri dish, remove air bubbles, and air-dry in a fume hood to obtain a pure silk fibroin film.

[0024] (2) Preparation of spinning solution: mix and dissolve the silk fibroin film and carbon nanotubes in (1) in anhydrous formic acid, the mass concentration of the spinning solution is 15%, the carbon nanotubes account for 0.5% of the mass of silk fibroin, and the solution is stirred After uniformity, spinning is carrie...

Embodiment 2

[0031] (1) Preparation of silk fibroin powder: after silk degumming, dissolve in 9.3 mol / L lithium bromide solution, the mass concentration of silk fibroin is 20%, filter the obtained solution, dialyze, and centrifuge with a centrifuge to obtain pure Silk fibroin solution, the mass concentration of which is between 6% and 7%, is diluted with deionized water until the mass concentration of silk fibroin is 3%, and the silk fibroin solution which is stirred evenly is prepared by freeze-drying method and ground into silk fibroin porous material Made into powder.

[0032] (2) Preparation of spinning solution: the silk fibroin film in (1) was cut into pieces and mixed with carbon nanotubes and dissolved in hexafluoroisopropanol. The mass concentration of the spinning solution was 6%, and the carbon nanotubes accounted for 1% of the mass of silk fibroin. %, the solution is stirred evenly before spinning.

[0033] (3) Adjust the electrospinning parameters. The voltage is 20 kV, the inj...

Embodiment 3

[0038] (1) Preparation of silk fibroin film: after silk degumming, dissolve in 9.3 mol / L lithium bromide solution, the mass concentration of silk fibroin is 20%, filter the obtained solution, dialyze, and then centrifuge with a centrifuge to obtain pure Silk fibroin solution, the mass concentration of which is between 6% and 7%, is diluted with deionized water until the mass concentration of silk fibroin is 3%, and the evenly stirred silk fibroin solution is pressed into a petri dish with a diameter of 9 cm with a syringe , inject 15 mL of the solution into each Petri dish, remove air bubbles, and air-dry in a fume hood to obtain a pure silk fibroin film.

[0039] (2) Preparation of spinning solution: the silk fibroin film in (1) was chopped and mixed with carbon nanotubes and dissolved in acetone. The mass concentration of the spinning solution was 10%, and the carbon nanotubes accounted for 2% of the mass of silk fibroin. The solution After stirring evenly, spinning is carri...

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

PropertyMeasurementUnit
strengthaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a material for a diaphragm of a loudspeaker and a preparation method thereof, belonging to the technical field of electroacoustic products. The material for the diaphragm is prepared by using electrospinning technique; fibroin and carbon nanotubes are blended to form the loudspeaker diaphragm with a micro-nano fibrous net structure; and in post-treatment, an ethanol solution is used for dipping and a polyurethane, polyacrylate or polyvinyl chloride coating is used for finishing, so the diaphragm has certain mechanical strength. According to the invention, supply of raw materials is sufficient; the preparation method is simple and has low energy consumption; the ultra-thin loudspeaker diaphragm is prepared while the strength of the diaphragm is guaranteed; the prepared diaphragm has high specific elasticity, good damping vibration attenuation performance and the characteristics of good sound effect and high fidelity; and the fibroin protein loudspeaker diaphragm has biodegradability, which is beneficial for environmental protection.

Description

technical field [0001] The invention relates to the technical field of electroacoustic products, in particular to a loudspeaker diaphragm material and a preparation method thereof. Background technique [0002] The loudspeaker is an electro-acoustic converter that converts electrical signals into acoustic signals. It converts electrical signals into acoustic signals and radiates them into the air through the speaker diaphragm. The loudspeaker diaphragm is a key component in the loudspeaker structure, and its raw material selection and molding process determine its important mechanical and acoustic properties. The general requirements for the speaker diaphragm are as follows: (1) It has a lower density and a thinner thickness to ensure the sensitivity of the speaker. (2) The elastic modulus is high and the material density is small, that is, it must have high specific elasticity (elastic modulus / material density), light weight and high strength, so that the diaphragm can per...

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 Patents(China)
IPC IPC(8): D01F4/02D01F1/10D01D5/00D06M15/564D06M15/263D06M15/248
Inventor 赵荟菁徐路燕何正洋党娟娟卞秋芬
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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