Polyurethane imide-graphene/nanometer carbon fiber blending wave-absorbing foam material and preparation method thereof

A technology of polyurethane imide and nano-carbon fiber, which is applied in the field of wave-absorbing materials, can solve the problems of complex process, increased wedges, and small application range, and achieve the effect of simple preparation process and good wave-absorbing performance

Active Publication Date: 2014-11-19
BEIJING RADIATION APPL RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Wedge absorbing materials are mostly used in microwave anechoic chambers, but as the frequency decreases (wavelength increases), the length of the wedge increases greatly, which is not only difficult to realize in terms of technology, but also greatly reduces the available space in the anechoic chamber; Flat plate absorbing materials can work in a wide range of operating frequencies, and can be made into any shape. The disadvantages are large thickness, complicated process, and high cost; coating absorbing materials are easy to use because of their simple process. It is easy to adjust and attracts attention, but its application range is small, mainly used on the surface of aircraft; and structural absorbing materials have dual functions of load bearing and absorbing, so they have become the main focus of research

Method used

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  • Polyurethane imide-graphene/nanometer carbon fiber blending wave-absorbing foam material and preparation method thereof
  • Polyurethane imide-graphene/nanometer carbon fiber blending wave-absorbing foam material and preparation method thereof
  • Polyurethane imide-graphene/nanometer carbon fiber blending wave-absorbing foam material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1, preparation polyurethane imide-graphene / nano-carbon fiber blended wave-absorbing foam material (PUI-1)

[0038] The preparation process of this embodiment is as follows figure 1 shown.

[0039] (1) Weigh 30g of 3,3,4,4-benzophenone tetraacid dianhydride in a beaker, add rosin polyester polyol (FC-300, hydroxyl value 400mgKOH / g, viscosity (25 ℃) is 6100mPa.s) 55g, polycarbonate diol (molecular weight is 2000) 15g, silicone oil 3.0g, tributylamine 1.5g, the ethylene glycol solution 1.0g of 33wt% triethylenediamine, stannous octoate 0.7 g, H 2 1.0g of O, 0.3g of graphene and 0.5g of carbon nanofibers (150-200nm in diameter and 10-30μm in length) were stirred thoroughly to make them evenly mixed to prepare Component A for later use.

[0040] (2) Component A is mixed with 67g of polyphenyl polymethylene polyisocyanate (PM-200) and fully stirred, and injected into the mold cavity after mixing evenly, and foamed at 25°C for 40 minutes; after the foam is stable...

Embodiment 2

[0046] Embodiment 2, preparation polyurethane imide-graphene / nano-carbon fiber blended wave-absorbing foam material (PUI-2)

[0047] The preparation process of this embodiment is as follows figure 1 shown.

[0048] (1) Weigh 3,3,4,4-benzophenone tetraacid dianhydride 30g in a beaker, add rosin polyester polyol (FC-300, hydroxyl value 400mgKOH / g, viscosity ( 25 ℃) is 6100mPa.s) 35g, polycarbonate diol (molecular weight is 2000) 35g, silicone oil 3.0g, tributylamine 1.5g, the ethylene glycol solution 1.0g of 33wt% triethylenediamine, stannous octoate 0.7g, H 2 1.0 g of O, 0.3 g of graphene and 1.0 g of carbon nanofibers (150-200 nm in diameter and 10-30 μm in length) were stirred thoroughly to make them evenly mixed to prepare component A for later use.

[0049] (2) Component A is mixed with 54g of polyphenyl polymethylene polyisocyanate (PM-200) and stirred thoroughly, and injected into the mold cavity after mixing evenly, and foamed at 25°C for 40 minutes; after the foam is...

Embodiment 3

[0055] Embodiment 3, preparation polyurethane imide-graphene / nano-carbon fiber blended wave-absorbing foam material (PUI-3)

[0056] The preparation process of this embodiment is as follows figure 1 shown.

[0057] (1) Weigh 3,3,4,4-benzophenone tetraacid dianhydride 30g in a beaker, add rosin polyester polyol (FC-300, hydroxyl value 400mg KOH / g, viscosity ( 25 ℃) is 6100mPa.s) 15g, polycarbonate diol (molecular weight is 2000) 55g, silicone oil 3.0g, tributylamine 1.5g, ethylene glycol solution 1.0g of 33wt% triethylenediamine, stannous octoate 0.7g, H 2 1.0g of O, 0.3g of graphene and 1.5g of carbon nanofibers (150-200nm in diameter and 10-30μm in length) were stirred thoroughly to make them evenly mixed to prepare Component A for later use.

[0058] (2) Mix Component A with 41 g of polyphenyl polymethylene polyisocyanate (PM-200) and stir thoroughly, inject it into the mold cavity after mixing evenly, and foam at 25°C for 40 minutes; after the foam is stable , taken out...

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Abstract

The invention discloses a polyurethane imide-graphene / nanometer carbon fiber blending wave-absorbing foam material and a preparation method thereof. According to the preparation method, dianhydride, polyalcohol, an adjuvant nanometer carbon fiber, a catalyst, a foaming agent and a foam stabilizer are mixed to obtain a component A, and the adjuvant is graphene or graphene oxide; and (2) the component A and polyisocyanate are mixed and then undergo foaming to obtain the olyurethane imide-graphene / nanometer carbon fiber blending wave-absorbing foam material. The method of the invention has the following advantages that (1) the contents of the raw materials can be adjusted in a wider range based on the one-step process of the method; (2) the nanometer carbon fiber as the wave absorber can make the foam material have good wave absorption performance; and (3) by adding graphene in the system, the mechanical performances of the foam material such as compression are greatly improved, and the electric performance of the foam material can be improved.

Description

technical field [0001] The invention relates to a polyurethane imide-graphene / nano-carbon fiber blended wave-absorbing foam material and a preparation method thereof, belonging to the field of wave-absorbing materials. Background technique [0002] In the field of polymer materials, polyimide foam is a new type of polymer foam formed by the interpenetration and cross development of polyurethane and polyimide. The structural feature of polyurethane imide is that its molecular chain contains not only the soft and hard segment structure of polyurethane, but also the imide structure of polyimide. Therefore, polyurethane imide foam not only retains the excellent properties of polyurethane materials, but also absorbs the characteristics of high flame retardancy and high temperature resistance of polyimide, so it can not only be used in military fields such as aircraft, ships and armored vehicles, but also in It has a wide range of uses in the construction and marine fields. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/44C08G73/10C08K3/04C08K7/06C08L75/06C08G101/00
CPCC08G18/165C08G18/4288C08G18/44C08G18/664C08G18/7664C08G73/1035C08K3/04C08K7/06C08K2201/003C08K2201/004C08K2201/011C08G2110/0083
Inventor 翟彤周成飞曹巍翟宇酒永斌王连才
Owner BEIJING RADIATION APPL RES CENT
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