Preparation method of intelligent magnetic noise-reducing polyurethane foam

A polyurethane foam and magnetic technology, which is applied in the field of preparation of intelligent magnetic noise-reducing polyurethane foam, can solve the problems of weak magnetic field response, poor sound absorption performance, and inability to meet various applications, and achieve stable performance in response to changes in external magnetic fields , controllable and repeatable acoustic and mechanical performance effects

Active Publication Date: 2015-03-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional polymer foam materials such as polyurethane, polyvinyl chloride and rubber have been widely used in aerospace, national defense and military, construction and other fields due to their good sound absorption and vibration reduction effects; but these sound absorption materials are isotropic materials, and their The magnetic particles are randomly impregnated in the pores or void

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A preparation method of intelligent magnetic noise-reducing polyurethane foam, comprising the following steps:

[0026] (1) Surface treatment of carbonyl iron powder:

[0027] Weigh 2g KH570, 88.2g methanol, 9.8g deionized water in a 500ml beaker, prepare an alcohol solution with a mass fraction of 2.0%, adjust the pH value of the alcohol solution to 4 with acetic acid, and weigh 200g of carbonyl iron powder Immerse in the prepared alcohol solution, stir mechanically for 1 hour, and dry under vacuum at 110°C for 30 minutes to obtain 1 part of carbonyl iron powder whose surface has been treated with KH570 for use.

[0028] (2) Preparation of intelligent magnetic noise-reducing polyurethane foam:

[0029] Mix 5 parts of surface-treated spherical carbonyl iron powder of 5um level with a fixed volume of polyol, that is, 100 parts of polyoxypropylene glycol-2000, and then add 2 parts of 1,4-butanediol chain extender and 2 parts of glycerin as a cross-linking agent, after m...

Embodiment 2

[0031] A preparation method of intelligent magnetic noise-reducing polyurethane foam, comprising the following steps:

[0032] (1) Surface treatment of carbonyl iron powder:

[0033] Weigh 1g KH570, 89.1g methanol, and 9.9g deionized water in a 500ml beaker, prepare an alcohol solution with a mass fraction of 1.0%, adjust the pH value of the alcohol solution to 4 with acetic acid, and weigh 200g of carbonyl iron powder Immerse in the prepared alcohol solution, stir mechanically for 1 hour, and dry under vacuum at 110°C for 30 minutes to obtain a portion of carbonyl iron powder whose surface has been treated with KH570, ready for use.

[0034] (2) Preparation of intelligent magnetic noise-reducing polyurethane foam:

[0035] Mix 5 parts of surface-treated 5um spherical carbonyl iron powder with a fixed volume of polyol, that is, 100 parts of polypropylene glycol, and then add 2 parts of 1,4-butanediol chain extender and 2 parts of glycerin as the cross-linking agent. After st...

Embodiment 3

[0037] A preparation method of intelligent magnetic noise-reducing polyurethane foam, comprising the following steps:

[0038] (1) Surface treatment of carbonyl iron powder:

[0039] Weigh 2g KH570, 88.2g methanol, and 9.8g deionized water in a 500ml beaker, prepare an alcohol solution with a mass fraction of 2.0%, adjust the pH value of the alcohol solution to 5 with acetic acid, and weigh 200g of carbonyl iron powder Immerse in the prepared alcohol solution, stir mechanically for 1 hour, and dry under vacuum at 110°C for 30 minutes to obtain 1 part of carbonyl iron powder whose surface has been treated with KH570 for use.

[0040] (2) Preparation of intelligent magnetic noise-reducing polyurethane foam:

[0041] Mix 10 parts of surface-treated 5um-grade spherical carbonyl iron powder with a fixed volume of polyol, that is, 100 parts of polyoxypropylene triol-3000, and then add 2 parts of 1,4-butanediol chain extender and 2 parts of glycerin as a cross-linking agent, after ...

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PUM

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Abstract

The invention belongs to the technical field of environmental protection and particularly relates to a preparation method of intelligent magnetic noise-reducing polyurethane foam. The preparation method comprises the following specific steps: treating the surface of carbonyl iron powder with a silane coupling agent; mechanically dispersing and prepolymerizing treated carbonyl iron powder, polyhydric alcohol and a chain extender; adding a crosslinking agent, a surfactant, a catalyst and isocyanate, rapidly stirring and pouring; and under the action of an external magnetic field, enabling carbonyl iron particles to form chain structures and be arranged in a foam skeleton and foaming at room temperature to produce anisotropic magnetic polyurethane foam. The entire preparation process has specific flow and is relatively simple and convenient to operate. The magnetic polyurethane foam is prepared by a one-step foaming process, the product combines the advantages of magnetic particles and polyurethane foam, has a flexible damping characteristic and is conductive to weakening the sound so that controllable acoustic and mechanical properties are achieved and the magnetic polyurethane foam can be used as a sound-absorption noise-reducing material. The magnetic polyurethane foam can be applied in fields such as civil use, automobiles and aerospace and has higher application values.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a preparation method of an intelligent magnetic noise-reducing polyurethane foam. Background technique [0002] With the continuous development of the national economy, national defense and society, noise pollution and control has become a key issue to be solved, in which flexible media and polymer foam materials play an important role. Traditional polymer foam materials such as polyurethane, polyvinyl chloride and rubber have been widely used in aerospace, national defense and military, construction and other fields due to their good sound absorption and vibration reduction effects; but these sound absorption materials are isotropic materials, and their The magnetic particles are randomly impregnated in the pores or voids of the open-cell foam. The structure of the magnetic particles is loosely connected. Their response to the magnetic field is very ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K9/06C08K3/18C08J9/14
CPCC08G18/1808C08G18/3206C08G18/4825C08G18/4829C08G18/6611C08G18/6677C08J9/141C08J2203/14C08K3/18C08K9/06C08K2201/003C08G2110/0008
Inventor 王晓杰李彬张丽华
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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