Cork-powder-based porous composite material and preparation method and application thereof

A technology of porous composite material and cork powder, which is applied in the field of cork powder-based porous composite material and its preparation, can solve the problems that cork resources cannot be utilized with high value, no high-end cork products, low gross profit rate, etc., and achieve good thermal insulation. Insulation properties, great application potential, easy-to-control effects

Inactive Publication Date: 2015-11-18
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, my country's cork industry is relatively backward. There is no independent high-end cork products. It has been exporting primary products such as cork bricks and cork paper. The gross profit margin is low, which prevents valuable cork resources from being used at a high value.

Method used

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  • Cork-powder-based porous composite material and preparation method and application thereof
  • Cork-powder-based porous composite material and preparation method and application thereof
  • Cork-powder-based porous composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Use "natural cork powder" as raw material to screen out cork particles with a particle size of 0.5mm~1mm;

[0029] (2) Take 200g of the above-mentioned cork particles, spread them in a container and place them in a high-power microwave oven with a power of 1850W, and take them out after 2 minutes of microwave treatment;

[0030] (3) Mechanically mix the microwave-treated cork powder and fumed silica at a mass ratio of 9:1 for 30 minutes to obtain a cork powder / fumed silica composite powder.

[0031] (4) Put the composite powder prepared above into a mold, apply a pressure of 10 tons to it, keep the pressure for 5 minutes, and take it out to obtain a filling core material.

[0032] (5) Put the core material into the packaging material for vacuum packaging to obtain a vacuum heat insulation board. After packaging, the vacuum degree in the vacuum bag is 0.1 mbar. The thermal conductivity of the prepared vacuum insulation panel was tested, and the thermal conductivity ...

Embodiment 2

[0034] (1) Use "expanded cork powder" as raw material to screen out cork particles with a particle size of 0.15mm~0.35mm;

[0035] (2) Take 200g of the above-mentioned cork particles, spread them in a container and place them in a high-power microwave oven with a power of 1850W, and take them out after 2 minutes of microwave treatment;

[0036] (3) Mechanically mix the microwave-treated cork powder and fumed silica at a mass ratio of 19:1 for 30 minutes to obtain a cork powder / fumed silica composite powder with a microscopic composite structure Such as figure 1 Shown in the scanning electron microscope photo.

[0037] (4) Put the composite powder prepared above into a mold, apply a pressure of 10 tons to it, keep the pressure for 5 minutes, and take it out to obtain a filling core material.

[0038] (5) Put the core material into the packaging material for vacuum packaging to obtain a vacuum heat insulation board. After packaging, the vacuum degree in the vacuum bag is 0.1 m...

Embodiment 3

[0040] (1) Use "expanded cork powder" as raw material to screen out cork particles with a particle size of 0.5mm~1mm;

[0041] (2) Take 200g of the above-mentioned cork particles, spread them in a container and place them in a high-power microwave oven with a power of 1850W, and take them out after 2 minutes of microwave treatment;

[0042] (3) Mechanically mix the microwave-treated cork powder and fumed silica at a mass ratio of 9:1, and the mixing time is 30 minutes to obtain a cork powder / fumed silica composite powder, whose microscopic composite structure Such as figure 2 Shown in the scanning electron microscope photo.

[0043] (4) Put the composite powder prepared above into a mold, apply a pressure of 10 tons to it, keep the pressure for 5 minutes, and take it out to obtain a filling core material.

[0044] (5) Put the core material into the packaging material for vacuum packaging to obtain a vacuum heat insulation board. After packaging, the vacuum degree in the vac...

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Abstract

The invention discloses a cork-powder-based porous composite material and a preparation method and application thereof, and belongs to the field of thermal insulation materials. Cork powder and fumed silica serve as main materials. The preparation method includes the following steps that the cork powder with the particle size of 0.15-1 mm is selected, and structure reforming is conducted on the cork powder through a microwave preprocessing method; and the cork powder is mixed with the fumed silica to obtain composite powder, pressure of 2-20 tons is exerted for 1-20 minutes, and then the cork-powder-based porous composite material can be obtained. According to a vacuum insulation panel compound core prepared according to the method, micro materials of the core material can be regulated and controlled on the aspect of the micrometer and nanometer size, and the core material is uniform in microstructure and low in heat conduction coefficient and has great application prospects in the heat preservation fields of aerospace aviation, construction, traffic transportation, household appliances and the like. In addition, the preparation method has the beneficial effects that the process is simple, cost is low, conditions can be easily controlled, the preparation cycle is short, no special devices are needed, and the preparation method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of heat-insulating materials, and in particular relates to a cork powder-based porous composite material and a preparation method and application thereof. Background technique [0002] Vacuum Insulation Panel (Vacuum Insulation Panel), also known as VIP board, is composed of filling core material, adsorbent and vacuum protection surface layer. The use of vacuum technology can effectively avoid the heat transfer caused by air convection, so the thermal conductivity of the material can be greatly reduced, so that the thermal conductivity at room temperature is less than 0.01W / mK. It has the characteristics of environmental protection and high efficiency and energy saving. Insulation Materials. Compared with other materials, vacuum insulation panels (VIP panels) have extremely low thermal conductivity, so when the insulation technical requirements are the same, they have the advantages of thin insulation layer and light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/00B27N1/00C04B30/00
Inventor 庄建东范毜仔田勤奋
Owner FUJIAN AGRI & FORESTRY UNIV
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