Method for preparing sound-absorbing material through doping of core-shell microspheres

A technology of sound-absorbing materials and microspheres, which is applied in the direction of silicon oxide and silicon dioxide, can solve the problems of poor sound-absorbing performance, and achieve the effect of improving sound-absorbing performance, improving sound-absorbing performance, and improving sound-absorbing performance

Inactive Publication Date: 2017-08-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of poor sound-absorbing performance of existing resin matrix materials, and provides a method for preparing sound-absorbing materials doped with core-shell microspheres

Method used

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  • Method for preparing sound-absorbing material through doping of core-shell microspheres
  • Method for preparing sound-absorbing material through doping of core-shell microspheres
  • Method for preparing sound-absorbing material through doping of core-shell microspheres

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specific Embodiment approach 1

[0012] Embodiment 1: In this embodiment, a method for preparing sound-absorbing materials doped with core-shell microspheres is specifically carried out in the following steps:

[0013] Defoaming the polyurethane prepolymer under the conditions of temperature 60℃~80℃ and pressure -0.05MPa to obtain the polyurethane prepolymer defoaming; 3,3'-dichloro-4,4'-diamino Diphenylmethane melts into a liquid state under the condition of an oil bath at a temperature of 110°C to obtain liquid 3,3'-dichloro-4,4'-diaminodiphenylmethane; the vibrating core-shell Nanoparticles, liquid 3,3'-dichloro-4,4'-diaminodiphenylmethane, toluene and polyurethane prepolymer are mixed to obtain a reaction system, the reaction system is poured into a mold, and then heated at a temperature of 60 ℃~80℃ and a pressure of -0.05MPa to remove air bubbles. After defoaming, transfer the reaction system to the vacuum drying oven together with the mold. Raise the temperature of the vacuum drying oven from room tempe...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the mass ratio of 3,3'-dichloro-4,4'-diaminodiphenylmethane to polyurethane prepolymer is 3:20. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: the mass ratio of the polyurethane prepolymer to toluene is 1g:0.4mL. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for preparing a sound-absorbing material through doping of core-shell microspheres and aims to solve the problem that an existing resin matrix material has poor sound absorption performance. The method comprises steps as follows: bubbles are removed from a polyurethane prepolymer; 3,3'-dichloro-4,4'-diaminodiphenylmethane is dissolved into a liquid state, and liquid-stage 3,3'-dichloro-4,4'-diaminodiphenylmethane is obtained; core-shell nanoparticles with vibratile inner cores, liquid-state 3,3'-dichloro-4,4'-diaminodiphenylmethane, toluene and the polyurethane prepolymer are mixed, a reaction system is obtained and poured into a mold, the reaction system and the mold are transferred into a vacuum drying box together after the bubbles are removed, gradient heating curing and demolding are performed, and a core-shell nanoparticle/ polyurethane composite is obtained. Sound-absorbing effects at different frequencies can be obtained by preparing core-shell structures with different particle sizes.

Description

technical field [0001] The invention relates to a method for preparing sound-absorbing materials by doping core-shell microspheres. Background technique [0002] Due to their unique structure and functionality, core-shell nanomaterials have attracted widespread attention and have broad application prospects. In recent years, the assembly strategy of nanomaterials or structures has become an important means to prepare novel multifunctional nanomaterials. Among many functionalized nanomaterials, nanomaterials with core-shell structure have received extensive attention. Core-shell nanomaterials are a multi-level nanostructure formed by covering particles of nanometer to micrometer size as the core and coating one or more layers of nanoscale shells on the surface. Generalized core-shell structure materials also include hollow spheres and microcapsules. Core-shell nanomaterials integrate many characteristics of inorganic, organic materials and nanostructures, and can achieve a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/10C08G18/32C08K3/36C01B33/12
Inventor 矫维成楚振明杨士萱陈翔陈卓
Owner HARBIN INST OF TECH
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