Method for preparing rare-earth oxide/rubber composite material for low-frequency sound absorption

A technology of rare earth oxides and composite materials, which is applied in the field of preparation of rare earth oxides/rubber composite materials, can solve problems such as high price, and achieve the effects of low production cost, improved mechanical properties, and saved separation cost.

Inactive Publication Date: 2013-07-10
WUHAN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Masao Sumita of Tokyo Institute of Technology in Japan filled thermoplastic resin with piezoelectric particles lead zirconate titanate (PZT) and conductive particle carbon black (CB) to prepare a low-frequency sound-absorbing material, but the filling amount of lead zirconate titanate needs to exceed 50% to be very good. Good at absorbing low-frequency sound waves, and expensive, only used for acoustic components and low-frequency sound wave diagnosis in medicine

Method used

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  • Method for preparing rare-earth oxide/rubber composite material for low-frequency sound absorption
  • Method for preparing rare-earth oxide/rubber composite material for low-frequency sound absorption
  • Method for preparing rare-earth oxide/rubber composite material for low-frequency sound absorption

Examples

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Effect test

Embodiment 1

[0024] A preparation method for a rare earth oxide / rubber composite material for low-frequency sound absorption, comprising the steps of:

[0025] 1) Pretreatment of rare earth oxides: according to the parts by weight of each raw material: 100 parts of rare earth oxides, 3 parts of coupling agents, select rare earth oxides and coupling agents; place rare earth oxides and coupling agents in In a high-speed mixer, stir at a high speed of 1200r / min for 10min to obtain the pretreated rare earth oxide for subsequent use; the coupling agent is a titanate coupling agent;

[0026] The rare earth oxide is a single rare earth oxide, lanthanum oxide (La 2 o 3 ), the purity is 99.8% (mass percentage), and the particle size is 0.3-4 μm.

[0027] 2) Selection of raw materials: According to the formula in Table 1, select butyl rubber, pretreated rare earth oxide, zinc oxide, stearic acid, sulfur, benzothiazole disulfide (accelerator DM) and softener, and reserve ;

[0028] 3) In the inte...

Embodiment 2

[0030] It is basically the same as Example 1, except that the rare earth oxide used is a mixture (lanthanum oxide and cerium oxide), the purity is 99.8% (mass percentage), and the particle size is 0.3-4 μm, wherein lanthanum oxide (La 2 o 3 ) and cerium oxide (Ce 2 o 3 ) each account for 50% by weight, and the ratio of rare earth oxide and rubber is different, see Table 1.

Embodiment 3

[0032] Basically the same as Example 1, the difference is that used is a single rare earth oxide: europium oxide (Eu 2 o 3 ), commercially available, with a purity of 99.8% (mass percentage), a particle size of 0.3-4 μm, and different ratios of rare earth oxides and rubber, see Table 1.

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Abstract

The invention relates to a method for preparing rare-earth oxide / rubber composite material for low-frequency sound absorption, which comprises the following steps of: 1) pretreating rare-earth oxides; 2) selecting raw materials; 3) adding the pretreated rare-earth oxides, rubber, zinc oxide, stearic acid, sulfur, a softener and benzothiazole disulfide into an internal mixer or an open mill sequentially for mixing to obtain mixing rubber; and vulcanizing the mixing rubber to obtain the rare-earth oxide / rubber composite material for the low-frequency sound absorption. The method has the advantages that: 1, the mechanical property of the composite material is improved; 2, the rare-earth oxide / rubber composite material is lighter than concrete and heavy metal plates; 3, a process is simple, and the production cost is low; and 4, the method is favorable for improving the flow property and machinability of the rare-earth oxide / rubber composite material.

Description

technical field [0001] The invention belongs to the field of low-frequency sound-absorbing materials, and in particular relates to a preparation method of a rare earth oxide / rubber composite material used for low-frequency sound absorption. Background technique [0002] Noise pollution, water pollution and air pollution are listed as the world's three major pollutions, seriously affecting the quality of human living environment. At present, the noise generated by industrial production and transportation is mainly medium and high frequency noise, and the monitoring and treatment of noise is mainly aimed at medium and high frequency noise, while the low frequency (<250HZ) noise with low decibels has not yet attracted people's sufficient understanding. In fact, the harm of low-frequency noise to the human body is no less than that of medium and high-frequency noise. Prolonged exposure to low-frequency noise can easily cause neurosis such as neurasthenia, insomnia, and headac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/22C08L9/02C08L11/00C08K13/06C08K9/04C08K3/22C08K5/47C08K3/04C08K3/34
Inventor 江学良
Owner WUHAN INSTITUTE OF TECHNOLOGY
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