Polyimide froth in situ filling honeycomb composite material

A composite material, polyimide technology, applied in the direction of coating, etc., to achieve the effect of outstanding compressive performance, good bonding and simple preparation process

Inactive Publication Date: 2008-02-27
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two patented methods only fill the honeycomb with pure polyimide foam, and the properties of flame retardancy, heat insulation, shock absorption, noise reduction and stealth often cannot meet many practical ap...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In a three-neck round bottom flask equipped with a stirrer, add 400 grams of 4,4'-ODA, 2400 grams of tetrahydrofuran and 800 grams of methanol in a mixed solvent, stir to dissolve all the solids, then add 620 grams of ODPA, and stir at 30 ° C After 12 hours, add 20 grams of carbon nanotubes, continue to stir for 3 to 5 hours, dry the solution at 70°C for 18 hours, and then grind it into powder, which is the polyimide foam precursor powder.

[0042] Use 80-mesh stainless steel screen to evenly fill 300 grams of the powder into the holes of a hexagonal quartz honeycomb with a side length of 10 mm and a size of 500 mm × 500 mm × 10 mm. A graphite plate is placed on the bottom of the honeycomb and covered on the honeycomb. Put a graphite plate into a high-temperature oven, heat at 140°C for 1 hour, 250°C for 1 hour, and 300°C for 1 hour, and then cool to obtain a carbon nanotube-modified polyimide foam-filled honeycomb composite material .

Embodiment 2

[0044] First, 300 grams of the polyimide foam precursor powder obtained in Example 1 was pre-foamed into microspheres at 140 ° C, and then the microspheres were evenly filled into a quartz honeycomb identical to that of Example 1, and the bottom pad of the honeycomb There is a graphite plate, and a graphite plate is covered on the honeycomb, and then put into a high-temperature oven, heated at 250°C for 1 hour, 300°C for 1 hour, and then cooled to obtain carbon nanotube modified polyimide foam Filled honeycomb composite.

Embodiment 3

[0046] In a three-neck round bottom flask equipped with a stirrer, add 200 grams of 4,4'-ODA, 1200 grams of tetrahydrofuran and 400 grams of methanol in a mixed solvent, stir to dissolve all the solids, then add 310 grams of ODPA, and stir at 30 ° C After 12 hours, the solution was dried at 70° C. for 18 hours and then ground into powder, and then 10 grams of carbon nanotubes were fully mixed with the obtained precursor powder to obtain a polyimide foam precursor powder. All the other are with embodiment 1.

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PUM

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Abstract

The invention discloses a medlin foam original position filling honeycomb composite material, which is characterized by the following: comprising (1) foaming medlin forerunner body powder or micro sphere, (2) functional filling, (3) coupling agent or surface active agent and (4) honeycomb; making up 5% wt-89% wt of the total weight of the composite material with the (1); counting 0. 01% wt-70% wt of the total weight of the composite material with the (2); making up 1% wt-3% wt of the total weight of the composite material with the (3); counting 10% wt-94% wt of the total weight of the composite material with the (4). The material possesses good fire resistant, low temperature resistance and mechanics property.

Description

technical field [0001] The invention relates to a honeycomb composite material filled with polyimide foam, in particular to a polyimide foam in-situ filled honeycomb composite material with dispersed and modified functional fillers. Background technique [0002] Polyimide is a kind of polymer material with excellent comprehensive performance and outstanding heat resistance. It is widely used in aviation, aerospace, microelectronics, electrical, liquid crystal, separation membrane, laser and other fields. There are many kinds of polyimide material products, mainly including: molding resin / parts, film, fiber, prepreg / composite material, coating, adhesive and soft, foam, etc. [0003] Polyimide foam has good flame retardancy, anti-open flame, no smoke, no harmful gas; light weight; good flexibility and resilience; easy to install and maintain; high and low temperature resistance; environmentally friendly, does not contain Halogen and ozone depleting substances and other advant...

Claims

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Application Information

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IPC IPC(8): C08L79/08C08K5/541C08J9/36C08K3/00
Inventor 詹茂盛王凯沈燕侠
Owner BEIHANG UNIV
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