Thermosetting resin glass fiber laminating composite material and preparation method thereof

A composite material and thermosetting technology, applied in the direction of chemical instruments and methods, glass/slag layered products, layered products, etc., can solve the problems of restricted application, high price of carbon fiber, etc., and achieve easy production and processing, and integration of electromagnetic wave absorption performance , the effect of high thermal stability

Active Publication Date: 2010-05-05
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of carbon fiber as a structural absorbing material has been reported, but its further application is restricted due to the high price of carbon fiber itself and the need for surface treatment.

Method used

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  • Thermosetting resin glass fiber laminating composite material and preparation method thereof
  • Thermosetting resin glass fiber laminating composite material and preparation method thereof
  • Thermosetting resin glass fiber laminating composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method of 4-aminophenoxy group-phthalonitrile monomer is:

[0023] Mix 4-nitrophthalonitrile, p-aminophenol, catalyst, and solvent, blow in nitrogen to replace the air, raise the temperature to 80-90°C for 4-8 hours, and pour the reaction mixture into 0.1M Precipitate in NaOH aqueous solution, filter and dry to obtain 4-aminophenoxy-phthalonitrile monomer.

[0024] The preparation method of two-terminal phthalonitrile-benzoxazine resin is:

[0025] Mix the dry 4-aminophenoxy-phthalonitrile monomer, bisphenol A, and solvent evenly, blow in nitrogen to replace the air in it, add paraformaldehyde in stages, and control the temperature at about 60°C when adding After the addition, the temperature is raised to 70-120° C. to continue the reaction for 3-5 hours; the reaction mixture is washed with hot water and vacuum dehydrated at 85-110° C. to obtain a double-terminated phthalonitrile-benzoxazine resin.

[0026] The preparation method of thermosetting resin...

Embodiment 1

[0036] Example 1 Preparation of double-terminated phthalonitrile-benzoxazine resin

[0037] (1) Synthesis of 4-aminophenoxy group-phthalonitrile: the raw material formula component is (by mole):

[0038] 4-Nitrophthalonitrile 1

[0039] p-Aminophenol 1

[0040] Anhydrous Potassium Carbonate 1.1

[0041] Dimethyl sulfoxide 15

[0042] (2) Synthesis of double-ended phthalonitrile-benzoxazine resin:

[0043]

[0044] Among them, Ar is:

[0045]

[0046] Raw material formula component is (by mole):

[0047] 4-Aminophenoxy-phthalonitrile 2

[0048] Bisphenol A 1

[0049] Paraformaldehyde 4

[0050] 1,4-dioxane / toluene (molar ratio 3:1) 15

[0051] Add 4-nitrophthalonitrile, p-aminophenol, anhydrous potassium carbonate, and dimethyl sulfoxide into a four-necked flask, pass through nitrogen to replace the air in it, raise the temperature, and react at 80-90°C Stop the reaction after 5 hours, pour the reaction mixture into 0.1M NaOH aqueous solution to precipitate, fil...

Embodiment 2

[0053] Embodiment 2 Preparation of thermosetting resin glass fiber laminated composite material

[0054] The raw material consumption is (by mass fraction):

[0055] Double-ended phthalonitrile-benzoxazine resin 100 parts

[0056] Glass fiber cloth 85 parts

[0057] Micron carbonyl iron powder 30 parts

[0058] Acetone 100 parts

[0059] Dissolve the thermosetting resin containing benzoxazine ring in acetone, add micron-sized carbonyl iron powder, and disperse with vigorous mechanical stirring for half an hour. Then cut the glass fiber cloth into a size of 20cm×20cm and stack it neatly, fully soak it in the dispersed mixed solution, dry it naturally, place it in a high-temperature oven at 160°C to evaporate the excess solvent after overnight drying, and then cool it naturally to obtain Prepreg. The prepreg is placed in a metal mold and pressed in a 15-ton hydraulic press. At the beginning, 1 / 3 of the pressure is applied to remove the interlayer air several times. For spec...

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Abstract

The invention belongs to the field of high molecular material and in particular to a thermosetting resin glass fiber laminating composite material and a preparation method thereof; the solved technical problem is that the thermosetting resin glass fiber laminating composite material which can adsorb electromagnetic waves is provided, and the thermosetting resin glass fiber laminating composite material is prepared by compounding and laminating double-terminal-group phthalonitrile-benzoxazine resin, which is shown by formula I, filling material, low boiling polar solvent and glass fiber cloth;the filling material is micron-sized carbonyl iron dust or multi-walled carbon nanotube. The thermosetting resin glass fiber laminating composite material has the characteristic that the mechanical structure performance and the electromagnetic wave adsorption performance are integrated, the material is applied to the electromagnetic wave adsorption material, compared with the carbon fiber, the glass fiber is used as reinforcing material, the cost is low, and the processing production is easy.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a thermosetting resin glass fiber laminated composite material and a preparation method thereof. Background technique [0002] Electromagnetic wave absorbing materials, also known as stealth materials, can absorb the electromagnetic wave energy incident on the surface of the material through various physical or chemical mechanisms, thereby greatly reducing the reflected echo energy. Since the 1960s, the research on stealth materials in various developed countries has been increasing, because the stealth and anti-reconnaissance of military targets are particularly important, and the research on wave-absorbing materials is mostly kept secret. [0003] Most of the traditional electromagnetic wave absorbing materials are various ferrite metal powder coating materials, which generally have the disadvantages of narrow absorption frequency band, large specific gravity, difficult constru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B17/04G21F1/12C08L79/04C08K7/00C08K7/14C08K9/04C08K3/04C08J5/18
Inventor 贾坤钟家春左芳赵睿刘孝波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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