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Lightweight multifunctional composite material prepared from polyurethane and cork particles as well as preparation method and application of lightweight multifunctional composite material

A technology of cork particles and composite materials, which is applied in the fields of heat insulation, sound absorption and noise reduction, vibration and energy absorption, and can solve problems such as poor mechanical properties, narrow polyurethane sound absorption frequency band, and difficult porous materials.

Active Publication Date: 2022-03-04
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a lightweight multifunctional composite material made of polyurethane and cork particles and its preparation method and application. , it is difficult to make porous materials by foaming cork particles

Method used

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  • Lightweight multifunctional composite material prepared from polyurethane and cork particles as well as preparation method and application of lightweight multifunctional composite material
  • Lightweight multifunctional composite material prepared from polyurethane and cork particles as well as preparation method and application of lightweight multifunctional composite material
  • Lightweight multifunctional composite material prepared from polyurethane and cork particles as well as preparation method and application of lightweight multifunctional composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1) Use 4 mesh and 6 mesh standard sieves to screen the cork particles with a particle size of 3.4 to 4.8 mm, clean them, and the cork particles will be kept at an ambient humidity of 60.6% RH for a long time;

[0042] 2) Take 83.4 parts of the above-mentioned cork particles, lay them flat in the mold and place them in an electric heating constant temperature drying box with a power of 2000W for heat treatment, set the temperature at 120°C, and take out the cork particles after 10 hours of heat treatment;

[0043] 3) Measure the surface temperature of the cork particles at 43.4°C, add 8.3 parts of polyurethane black material into the mold, stir and mix thoroughly, and stir for 5 minutes to ensure that the surface of the cork particles is attached to the polyurethane black material to obtain a mixed material. Measure the surface temperature at 34.3°C, and the environment Temperature 26.4°C;

[0044] 4) Pour 8.3 parts of polyurethane white material into the mold, stir quickl...

Embodiment 2

[0049] 1) Use 4 mesh and 6 mesh standard sieves to screen the cork particles with a particle size of 3.4 to 4.8 mm, clean them, and the long-term environmental humidity of the cork particles is 61.6% RH;

[0050] 2) Take 85.7 parts of the above-mentioned cork particles, lay them flat in the mold and place them in an electric heating constant temperature drying box with a power of 2000W for heat treatment, set the temperature at 120°C, and take out the cork particles after 10 hours of heat treatment;

[0051] 3) Measure the surface temperature of the cork particles at 45.4°C, add 5.7 parts of polyurethane white material into the mold, fully stir and mix, and stir for 10 minutes to ensure that the surface of the cork particles is attached to the polyurethane white material to obtain a mixed material. The measured surface temperature is 35.3°C, and the ambient temperature 26.4°C;

[0052] 4) Pour 18.6 parts of polyurethane black material into the mold, stir quickly and fully, sti...

Embodiment 3

[0057] 1) Use 16 mesh and 20 mesh standard sieves to screen cork particles with a particle size of 0.8 to 1.2 mm, clean them, and the long-term environmental humidity of cork particles is 63.2% RH;

[0058] 2) Take 82.8 parts of the above-mentioned cork particles, lay them flat in the mold and place them in an electric heating constant temperature drying box with a power of 2000W for heat treatment, set the temperature at 110°C, and take out the cork particles after 4 hours of heat treatment;

[0059] 3) Measure the surface temperature of the cork particles at 56.4°C, add 8.6 parts of polyurethane white material into the mold, fully stir and mix, and stir for 20 minutes to ensure that the surface of the cork particles is attached to the polyurethane white material to obtain a mixed material. The measured surface temperature is 33.3°C, and the ambient temperature 25.4°C;

[0060] 4) Pour 8.6 parts of polyurethane black material into the mold, stir quickly and fully, stir for 10...

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Abstract

The invention discloses a lightweight multifunctional composite material prepared from polyurethane and cork particles, and a preparation method and application thereof, and belongs to the technical field of vibration reduction, energy absorption, heat insulation, heat preservation, sound absorption and noise reduction. According to the lightweight multifunctional composite material, cork particles are used as a main raw material, polyurethane is used as a foaming agent, according to different volume parts, stirring, heating and standing processes are assisted, and then high-temperature fumigation is carried out through a constant-temperature box, so that the cork particles are expanded to release natural resin to enhance the bonding effect of the cork particles and the polyurethane; therefore, a series of lightweight multifunctional composite materials prepared from polyurethane and cork particles are prepared. Through the synergistic effect between the cork particles and the polyurethane, the multifunctional composite material has good performance in the aspects of vibration reduction, energy absorption, heat insulation, heat preservation, sound absorption and noise reduction. The preparation method provided by the invention is simple in process and easy to regulate and control, can realize preparation of various multifunctional materials, does not need special processing equipment in the processing process, is low in cost, and has industrial popularization and application significance.

Description

technical field [0001] The invention belongs to the technical fields of vibration reduction and energy absorption, heat insulation and sound absorption and noise reduction, and specifically relates to a lightweight multifunctional composite material made of polyurethane and cork particles and its preparation method and application. Background technique [0002] Polyurethane is a polymer containing carbamate groups in the main chain of macromolecules, called polyurethane. Polyurethane contains a lot of static air, so it has a low thermal conductivity, making it a commonly used thermal insulation material in cars, refrigerators, houses, etc. Polyurethane materials can be in direct contact with edible products without any harm to the human body, and are a safe adhesive. [0003] The cork is taken from the bark of the oak tree. It does not contain harmful chemical components such as formaldehyde and has no toxic smell. Through high-temperature fumigation with equipment, the cor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L75/04
CPCC08L97/02C08L75/04
Inventor 陈天宁朱建张钧哲辛锋先丁伟
Owner XI AN JIAOTONG UNIV
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