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Preparation method of epoxy resin matrix composite material

A composite material and epoxy resin technology, applied in the field of composite materials, can solve the problems of mismatching linear expansion coefficients, falling blocks, cracks, etc., and achieve the effect of great economic and social benefits

Inactive Publication Date: 2018-04-20
SHAANXI AVIATION ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the present invention: After curing and cross-linking the epoxy resin-based composite material, it can effectively fill the sealing gap, fix the pin and the wire, and maintain good insulation between the two pins, and solve the problem of cracking and falling off after sealing. Problems such as block, linear expansion coefficient mismatch and honeycomb defects, etc., improve the heat resistance, durability and safety of product use

Method used

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  • Preparation method of epoxy resin matrix composite material
  • Preparation method of epoxy resin matrix composite material
  • Preparation method of epoxy resin matrix composite material

Examples

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preparation example Construction

[0029] A preparation method of epoxy resin-based composite material, the method adopts the following steps:

[0030] 1) Pretreatment of titanium dioxide

[0031] Place the titanium dioxide in a high-temperature container and heat it at 950℃ for at least 2 hours to convert all the titanium dioxide into stable rutile titanium dioxide; ball mill the heat-treated rutile titanium dioxide on a ball mill to achieve a particle size of more than 200 mesh ;

[0032] 2) Pretreatment of phlogopite

[0033] Soak the phlogopite in a 10% dilute hydrochloric acid solution for 2 to 4 hours to remove the impurity iron of the phlogopite, fully wash the soaked phlogopite, and dry it, and ball mill it on a ball mill to achieve a particle size of more than 200 mesh. The phlogopite obtained is bottled for later use;

[0034] 3) Preparation of epoxy resin-based composite materials

[0035] The ratio of raw materials to 4,4-diaminodiphenylmethane tetraglycidol is 55%, the ratio of T-type bismaleimide resin is ...

Embodiment

[0043] Taking a certain product (HTQ-17A) as an example, the product processing is as follows figure 1 After the cavity is formed, the epoxy resin-based composite material is filled into the cavity, and after curing and cross-linking, the cover plate 5 is welded to the shell assembly. The cover plate and the composite material surface have a cavity of about 7 mm. The preparation and construction methods of epoxy resin-based composite materials are as follows:

[0044] 1. Pretreatment of titanium dioxide.

[0045] Heat the titanium dioxide in a corundum crucible at 950℃ for 2h for heat treatment. The heat treatment temperature system is as follows: room temperature~600℃, 200℃ / h; 600℃~800℃, 150℃ / h; 800℃~950℃, 80℃ / h; 950 +10 ℃, keep for 2h.

[0046] The heat-treated gold-red titanium dioxide is ball milled on a planetary ball mill for 1 hour to achieve a 200-mesh sieve with no sieve residue.

[0047] 2. Pretreatment of phlogopite

[0048] Soak the phlogopite in a 10% dilute hydrochlori...

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Abstract

Belonging to the technical field of composite materials, the invention relates to an epoxy resin matrix composite material and a preparation method thereof. According to the invention, 4, 4-diaminodiphenylmethane tetraglycidylamine is adopted to achieve good heat resistance; T type bismaleimide resin is taken as the toughening agent, and titanium dioxide and phlogopite are employed as the filler to enhance the hardness and adjust the thermal expansion coefficient so as to match with a stainless steel cavity and improve the thermal shock resistance and heat resistance; boron trifluoride-ethylamine is adopted as the accelerant, and triethanolamine is taken as the curing agent to adjust the viscosity and curing crosslinking speed. The epoxy resin matrix composite material prepared by the method provided by the invention solves the problems of unsmooth surface, cracking, block fall and other problems after potting of an epoxy potting material used by ion flame detectors, the heat resistance is raised from the original 361DEG C to 408DEG C, the thermal expansion coefficient matches with a potting cavity material, and the material performance meets the requirements of supporting products. The epoxy resin matrix composite material is successfully applied to potting and filling materials of various aviation ion flame detectors already, and has great economic and social benefits.

Description

Technical field [0001] The invention relates to an epoxy resin-based composite material and a preparation method thereof, belonging to the technical field of composite materials. Background technique [0002] Epoxy resin-based composite materials are widely used in structural filling and sealing due to their good adhesion, flexibility, toughness, thermochemical properties, good moisture resistance, and good surface finish after curing. Especially in the field of aero-engine ion flame detectors, due to the high heat-resistant temperature, high mechanical strength and good pressure resistance of epoxy resin-based composite materials, it can fully meet the harsh flame detection working environment of aero-engines. The flame detector is widely used as a filling and fixing structure function. [0003] The ion flame detector adopts the existing short-chain epoxy resin potting material. After curing, the surface shows honeycomb defects, surface cracks, and blocks are mainly caused by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L79/08C08K9/02C08K9/00C08K3/22C08K3/34C08G59/50C08G59/72C08G59/32
CPCC08G59/32C08G59/5006C08G59/72C08K2003/2241C08K2201/005C08L63/00C08L2201/08C08L79/08C08K9/02C08K9/00C08K3/22C08K3/34
Inventor 党腾华宋乐胡忠成杨爱梅
Owner SHAANXI AVIATION ELECTRICAL
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