Polyurethane composite sound absorption material containing natural plant components and preparation method thereof

A technology of sound-absorbing materials and natural plants, applied in the field of material science, can solve problems such as poor low-frequency sound-absorbing performance, and achieve the effects of wide application range, improved low-frequency sound-absorbing performance, and simple preparation method

Pending Publication Date: 2021-07-23
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention uses corn husks as fillers, which improves the influence of experimental errors caused by the relatively large volume of filler monomers, and also overcomes the problem of poor low-frequency sound absorption performance of existing polyurethane sound-absorbing materials

Method used

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  • Polyurethane composite sound absorption material containing natural plant components and preparation method thereof
  • Polyurethane composite sound absorption material containing natural plant components and preparation method thereof

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preparation example Construction

[0025] The invention provides a polyurethane composite sound-absorbing material containing natural plant components and a preparation method of the polyurethane composite sound-absorbing material.

[0026] Polyurethane composite sound-absorbing material

[0027] The polyurethane composite sound-absorbing material includes the following components: polyether polyol, foam stabilizer, catalyst, foaming agent diphenylmethane diisocyanate and corn hulls.

[0028] In one or more embodiments of the present invention, the polyurethane composite sound-absorbing material includes the following components by weight: 100 parts by weight of polyether polyol, 1.5 parts by weight of foam stabilizer, 1.2 parts by weight of catalyst, 4.0 parts by weight of foaming agent, 69 parts by weight of diphenylmethane diisocyanate and 2-8 parts by weight of corn hulls.

[0029] In one or more embodiments of the present invention, the polyether polyol is selected from one or both of polyether polyol 330...

Embodiment 1

[0042]Polyurethane composite sound-absorbing material containing natural plant components: including the following components: 100 parts by weight of polyether polyol (60 parts by weight of polyether polyol 330N, 40 parts by weight of polyether polyol 3630), 1.5 parts by weight of Foam stabilizer (silicone oil), 1.2 parts by weight of catalyst (0.2 parts by weight of bis(dimethylaminoethyl) ether mass fraction is 70% dipropylene glycol solution and 1 weight part of triethylenediamine mass fraction is 33% dipropylene glycol solution), 4.0 parts by weight of blowing agent (deionized water), 69 parts by weight of diphenylmethane diisocyanate and 2 parts by weight of corn hulls. The grain size of the corn husk is less than 1mm.

[0043] The steps of a method for preparing a polyurethane composite sound-absorbing material containing natural plant components are as follows:

[0044] Step 1): According to the components and parts by weight in the above formula, 60 parts by weight of...

Embodiment 2

[0050] Polyurethane composite sound-absorbing material containing natural plant components: including the following components: 100 parts by weight of polyether polyol (60 parts by weight of polyether polyol 330N, 40 parts by weight of polyether polyol 3630), 1.5 parts by weight of Foam stabilizer (silicone oil), 1.2 parts by weight of catalyst (0.2 parts by weight of bis(dimethylaminoethyl) ether mass fraction is 70% dipropylene glycol solution and 1 weight part of triethylenediamine mass fraction is 33% dipropylene glycol solution), 4.0 parts by weight of blowing agent (deionized water), 69 parts by weight of diphenylmethane diisocyanate and 4 parts by weight of corn hulls. The grain size of the corn husk is less than 1mm.

[0051] The steps of the preparation method of the polyurethane composite sound-absorbing material containing natural plant components are as follows:

[0052] Step 1): According to the components and parts by weight in the above formula, 60 parts by wei...

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Abstract

The invention provides a polyurethane composite sound absorption material containing natural plant components. The polyurethane composite sound absorption material comprises the following components: polyether polyol, a foam stabilizer, a catalyst, a foaming agent, diphenylmethane diisocyanate and corn shells. The invention further provides a preparation method of the polyurethane composite sound absorption material containing the natural plant components. The corn husks are added to improve the low-frequency sound absorption performance of polyurethane, the sound absorption coefficient of the polyurethane composite sound absorption material containing the natural plant components at the low frequency reaches 0.968, the average sound absorption coefficient reaches 0.608, the sound absorption peak frequency is 1338.11 Hz, the acoustic performance is superior to that of traditional polyurethane foam, and the polyurethane composite sound absorption material belongs to an efficient sound absorption material. The preparation method of the polyurethane composite sound absorption material is simple and wide in application range.

Description

technical field [0001] The patent of the present invention relates to the field of material science and technology, especially to acoustic packaging materials, specifically to a polyurethane composite sound-absorbing material containing natural plant components and a preparation method thereof. Background technique [0002] With the improvement of people's living standards and the rapid development of the automobile industry, people's demand for cars has risen from the initial means of transportation to a comfortable mobile space. Therefore, the noise problem closely related to automobiles has been paid more and more attention. If people are in a noisy environment for a long time, it will lead to the central nervous system disorder of the human body, abnormal conditioned reflex, headache, dizziness and tinnitus and other symptoms. Moreover, traffic accidents indirectly caused by vehicle noise are not uncommon. Therefore, reducing the noise in the car is of great significan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/64C08G101/00
CPCC08G18/4816C08G18/6492C08G18/4081
Inventor 姚海超杨啟梁胡溧陈红祥熊康贺献博
Owner WUHAN UNIV OF SCI & TECH
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