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Rare earth oxide/nitrile rubber-polyurethane foam double-layer composite material for low-frequency sound absorption and its preparation method

A rare earth oxide, polyurethane foam technology, applied in the field of material processing, can solve problems such as poor sound absorption performance, and achieve the effect of improving low frequency sound absorption performance, wide application prospects, and reducing quality

Active Publication Date: 2020-11-27
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the polyurethane porous sound-absorbing material has good sound-absorbing performance at high frequencies, its sound-absorbing performance at low frequencies is poor, and the most important noise range in life happens to be in the middle and low-frequency range, so the development of low-frequency sound-absorbing performance is excellent Sound-absorbing materials are necessary

Method used

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  • Rare earth oxide/nitrile rubber-polyurethane foam double-layer composite material for low-frequency sound absorption and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A Gd for low frequency sound absorption 2 o 3 The preparation method of / acrylonitrile-butadiene rubber composite material-polyurethane foam double-layer composite material, its preparation steps are as follows:

[0023] (1) Pretreatment of rare earth oxide powder: according to the parts by weight of each raw material: 100 parts of rare earth oxide, 1 to 5 parts of coupling agent, select rare earth oxide and titanate coupling agent; The raw materials were put into a ball mill and ball milled at a high speed of 1500r / min for 30min to obtain the modified rare earth oxide for later use;

[0024] (2) Rubber mixing formula: 100 parts of nitrile rubber; 5 parts of zinc oxide; 0.75 parts of zinc stearate; 0.75 parts of stearic acid; 2 parts of antioxidant RD; 1.5 parts of sulfur; 2 parts of accelerator TMTD; accelerator CZ 1 part; 20 parts of carbon black; modified Gd 2 o 3 25 parts of powder; add nitrile rubber, zinc oxide, stearic acid, zinc stearate, antioxidant RD, acce...

Embodiment 2

[0028] A La for low frequency sound absorption 2 o 3 The preparation method of / acrylonitrile-butadiene rubber composite material-polyurethane foam double-layer composite material, its preparation steps are as follows:

[0029] (1) Pretreatment of rare earth oxide powder: according to the parts by weight of each raw material: 100 parts of rare earth oxide, 1 to 5 parts of coupling agent, select rare earth oxide and titanate coupling agent; The raw materials were put into a ball mill and ball milled at a high speed of 1500r / min for 30min to obtain the modified rare earth oxide for later use;

[0030] (2) Rubber mixing formula: 100 parts of nitrile rubber; 5 parts of zinc oxide; 0.75 parts of zinc stearate; 0.75 parts of stearic acid; 2 parts of antioxidant RD; 1.5 parts of sulfur; 2 parts of accelerator TMTD; accelerator CZ 1 part; 20 parts of carbon black; modified La 2 o 3 25 parts of powder; add nitrile rubber, zinc oxide, stearic acid, zinc stearate, antioxidant RD, acce...

Embodiment 3

[0034] A Y for low frequency sound absorption 2 o 3 The preparation method of / acrylonitrile-butadiene rubber composite material-polyurethane foam double-layer composite material, its preparation steps are as follows:

[0035] (1) Pretreatment of rare earth oxide powder: according to the parts by weight of each raw material: 100 parts of rare earth oxide, 1 to 5 parts of coupling agent, select rare earth oxide and titanate coupling agent; The raw materials were put into a ball mill and ball milled at a high speed of 1500r / min for 30min to obtain the modified rare earth oxide for later use;

[0036] (2) Rubber mixing formula: 100 parts of nitrile rubber; 5 parts of zinc oxide; 0.75 parts of zinc stearate; 0.75 parts of stearic acid; 2 parts of antioxidant RD; 1.5 parts of sulfur; 2 parts of accelerator TMTD; accelerator CZ 1 part; carbon black 20 parts; modified Y 2 o 3 25 parts of powder; add nitrile rubber, zinc oxide, stearic acid, zinc stearate, antioxidant RD, accelerat...

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Abstract

The invention belongs to the technical field of material processing, and particularly relates to a rare earth rubber-polyurethane foam composite layered material used for low frequency sound absorption and a preparation method thereof. The method comprises the following steps: pretreating rare earth oxide powder; sequentially adding nitrile rubber, zinc oxide, stearic acid, zinc stearate, an anti-aging agent, an accelerator, carbon black, rare earth oxide powder, sulfur and a softener into an internal mixer or an open mill for mixing and vulcanization treatment to obtain a rare earth oxide-nitrile rubber composite material for low frequency sound absorption; using a binder to compound the rare earth oxide-nitrile rubber composite material and polyurethane foam according to the structure with the rare earth oxide-nitrile rubber composite material on one side facing the sound wave and the polyurethane foam on the other side to obtain the rare earth oxide / butyronitrile rubber-polyurethanefoam double layered composite material. The rare earth oxide / butyronitrile rubber-polyurethane foam double layered composite material has a plurality of energy dissipation mechanisms such as magneticacoustic conversion, damping dissipation and interface resonance, has an excellent mid-low frequency sound absorption effect, is light in quality and small in thickness, and has broad application prospects in the field of sound absorption.

Description

technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a rare earth oxide / nitrile rubber-polyurethane foam double-layer composite material for low-frequency sound absorption and a preparation method thereof. Background technique [0002] As one of the three major pollutions in the world, long-term exposure to noise pollution will not only cause hearing damage, but may also induce a variety of cancer-causing and fatal diseases. Due to people's requirements for quality of life, reasonable control of noise is very important. At the same time, noise reduction and sound absorption are necessary conditions for some industrial production and scientific research. Therefore, it is particularly important to study and prepare efficient sound-absorbing and vibration-damping materials. [0003] Sound-absorbing material is a material that absorbs sound waves by the damping effect of the material body or the structural reso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08K13/06C08K9/04C08K3/22C08K5/098C08K5/09C08K3/04C08K5/3437B32B9/00B32B9/04B32B27/40B32B5/18B32B25/18B32B25/08B32B7/12B32B33/00B32B37/12
CPCB32B7/12B32B9/00B32B9/046B32B25/045B32B25/18B32B33/00B32B37/12B32B2266/0278B32B2307/10B32B2307/56C08K3/04C08K3/22C08K5/09C08K5/098C08K5/3437C08K9/04C08K13/06C08K2003/221C08K2003/2296C08K2201/003C08L9/02
Inventor 江学良王知杰姚楚游峰
Owner WUHAN INSTITUTE OF TECHNOLOGY
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