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Production method of polyether ketone and modified nano silicon dioxide foaming materials and by supercritical carbon dioxide

A technology of nano-silica and foaming materials, applied in the field of materials, to achieve the effect of high cell density, excellent heat resistance, and simple foaming process

Active Publication Date: 2013-11-06
大连疆宇新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current domestic patent technology research on the preparation of polyetherketone foaming materials, there is no application of modified nano-silica as a nucleating agent to prepare PPEK foaming materials

Method used

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  • Production method of polyether ketone and modified nano silicon dioxide foaming materials and by supercritical carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The present embodiment is the preparation of the micro-foaming material of pure PPEK, and the concrete foaming process is as follows:

[0027] (1) Put the mold containing 12g of PPEK powder into the muffle furnace for 50 minutes, and then mold a 2mm PPEK sheet on a flat vulcanizing machine;

[0028] (2) Place the sheet obtained in step (1) in an autoclave, and pass through supercritical CO 2 Perform saturation, the saturation pressure is 20MPa, the saturation temperature is 50°C, and a saturated PPEK sheet is obtained after 60 minutes;

[0029] (3) Put the sheet obtained in step (2) into an oil bath at a temperature of 270°C and foam for 60 seconds to obtain a PPEK foam sheet.

[0030] The density of the PPEK foam sheet prepared above is 1.001g / cm 3 , the average cell size can reach 32.8μm, and the cell density can reach 3.38×10 6 Cells / cm 3 .

Embodiment 2

[0032] The specific foaming process of the present embodiment is as follows:

[0033] (1) Evenly mix 12g of dried PPEK powder with 0.12g of modified nano-silicon dioxide, put the mold containing PPEK-modified nano-silicon dioxide powder into the muffle furnace for 50min, and then mold it on a flat vulcanizing machine. 2mm PPEK-modified nano-silica sheet;

[0034] (2) Put the sheet obtained in step (1) into an autoclave, and pass through supercritical CO 2 Carry out saturation, the saturation pressure is 20MPa, the saturation temperature is 50°C, and after 60min, a saturated PPEK-modified nano-silica sheet is obtained;

[0035] (3) Put the sheet obtained in step (2) into an oil bath at a temperature of 270° C. for 60 seconds to foam for 60 seconds to obtain a PPEK-modified nano-silica foam sheet.

[0036] The density of the PPEK-modified nano silicon dioxide foam sheet prepared above is 0.975g / cm 3 , the average cell size can reach 8.85μm, and the cell density can reach 1.62...

Embodiment 3

[0038] The concrete foaming process of this implementation is as follows:

[0039](1) Evenly mix 12g of dried PPEK powder with 0.12g of modified nano-silica, put the mold containing PPEK-modified nano-silica powder into the muffle furnace for 50min, and then mold it on a flat vulcanizing machine. 2mm PPEK-modified nano-silica sheet;

[0040] (2) Put the sheet obtained in step (1) into an autoclave, and pass through supercritical CO 2 Carry out saturation, the saturation pressure is 27MPa, the saturation temperature is 50°C, and a saturated PPEK-modified nano-silica sheet is obtained after 60 minutes;

[0041] (3) Put the sheet obtained in step (2) into an oil bath at a temperature of 270° C. for 90 seconds to foam to obtain a PPEK-modified nano-silica foam sheet.

[0042] The density of the PPEK-modified nano-silica foam sheet prepared above is 0.709g / cm 3 , the average cell size can reach 11.0μm, and the cell density can reach 2.07×10 9 Cells / cm 3 , improved nearly 3 ord...

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Abstract

The invention discloses a production method of polyether ketone and modified nano silicon dioxide foaming materials and by supercritical carbon dioxide. The production method comprises the following steps of enabling fluid carbon dioxide in the supercritical state to be utilized as physical foaming agents and modified nano silicon dioxide to be utilized as nucleating agents to perform physical foaming on polyether ketone; enabling polyether ketone and modified nano silicon dioxide sheets to be saturated in an autoclave; achieving foaming of the saturated polyether ketone sheets in a high temperature oil bath to obtain closed-cell foaming materials with uniformly distributed foaming cells, wherein the size of the foaming cells can change through process conditions. According to the production method of the polyether ketone and modified nano silicon dioxide foaming materials and by the supercritical carbon dioxide, the polyether ketone is utilized as raw materials and the green and environment-friendly foaming method is utilized to obtain high temperature resistant polymers, so that the original excellent performance is guaranteed, the production cost is greatly reduced, and accordingly the polyether ketone and modified nano silicon dioxide foaming materials are wide in application prospect.

Description

technical field [0001] The invention relates to a method utilizing supercritical CO 2 The invention discloses a method for preparing a polyether ketone-modified nano silicon dioxide foam material, which belongs to the field of materials. Background technique [0002] Polyether ketone (PPEK) is a new type of high-performance engineering plastic containing phthalazinone-biphenyl structure. It has high temperature resistance and excellent comprehensive performance. PPEK molecules connect rigid benzene rings and xaphthalene biphenyl groups through ether bonds and ketone groups. The introduction of the phthalazinone structure, on the one hand, increases the steric hindrance between the molecular chains, and on the other hand, makes the molecules The main chain is twisted, so it has good heat resistance and high glass transition temperature. Because it does not contain a lactone-based structure, it overcomes the shortcomings of PEEK. It has been used in high-performance resin-bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L71/10C08K9/04C08K3/36B29C43/00B29C44/00
Inventor 曲敏杰郑来久祝诗洋蹇锡高郭静赵建何玲玲
Owner 大连疆宇新材料科技有限公司
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