High-strength epoxy structural adhesive for adhering carbon fiber composite materials

A technology of epoxy structural adhesive and composite material, applied in the direction of epoxy resin adhesive, adhesive type, conjugated diene adhesive, etc. surface damage and other problems, to achieve the effect of small performance attenuation, high bonding strength and good thermal conductivity

Active Publication Date: 2016-01-13
SHENCAI TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the bonding strength of epoxy structural adhesives used between carbon fiber composite materials and carbon fiber composite materials is low, and because of the low surface activity of carbon fiber bulk, there is currently no suitable pretreatment agent to treat the surface of carbon fiber. After the surface is polished, the adherend cannot achieve the effect of destroying the bonded surface of the carbon fiber composite material, especially the performance of the 10-day cycle test at a low temperature of 40°C to a high temperature of 80°C cannot meet the requirements, and the evaluation of the aging phenomenon in the outdoor environment is not good. The thermal conductivity is poor, so it cannot meet the stringent requirements of aerospace, military, rail transportation, water transportation, automobiles, sports equipment, and electronic products.

Method used

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  • High-strength epoxy structural adhesive for adhering carbon fiber composite materials

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] A high-strength epoxy structural adhesive for bonding carbon fiber composite materials, which is composed of A component and B component, and the components and mass fractions contained in the A component are: E51 / polybutadiene rubber 40 parts of polymer, 60 parts of mixed epoxy resin, 0.2 part of reinforced graphene, 5 parts of SBM / MAM copolymer, 6 parts of ETBN toughening agent, 0.1 part of dispersant, 1 part of nano-sized attapulgite, hydrophilic 1 part of fumed silica and 0.5 part of silane coupling agent; wherein, the specific surface area of ​​the reinforced graphene is 150m 2 / g, the pH value is 7.0; the epoxy equivalent of the hybrid epoxy resin is 117-127 g / eq; the particle size of the nano-scale attapulgite is 100 nm; the hydrophilic fumed silica has a Specific surface area (BET method) is 360m 2 / g.

[0032] The components and their parts included in the B component are: 85 parts of modified polyamide, 15 parts of flexible polyamide, 3 parts of ATBN reactiv...

Embodiment 2

[0041] A high-strength epoxy structural adhesive for bonding carbon fiber composite materials, which is composed of A component and B component, and the components and mass fractions contained in the A component are: E51 / polybutadiene rubber 45 parts of polymer, 55 parts of mixed epoxy resin, 0.25 part of reinforced graphene, 6 parts of SBM / MAM copolymer, 7 parts of ETBN toughening agent, 0.2 part of dispersant, 2 parts of nano-sized attapulgite, hydrophilic 2 parts of fumed silica and 0.8 part of silane coupling agent; wherein, the specific surface area of ​​the reinforced graphene is 200m 2 / g, the pH value is 8.0; the epoxy equivalent of the hybrid epoxy resin is 117~127g / eq; the specific surface area (BET method) of the hydrophilic fumed silica is 400m 2 / g; the particle size of the nano-scale attapulgite is 200nm.

[0042] The components and the number of parts contained in the B component are: 88 parts of modified polyamide, 12 parts of flexible polyamide, 4 parts of ATB...

Embodiment 3

[0051] A high-strength epoxy structural adhesive for bonding carbon fiber composite materials, which is composed of A component and B component, and the components contained in the A component and their mass parts are: E51 / polybutadiene rubber 50 parts of polymer, 50 parts of mixed epoxy resin, 0.3 parts of reinforced graphene, 7 parts of SBM / MAM copolymer, 8 parts of ETBN toughening agent, 0.3 parts of dispersant, 3 parts of nano-scale attapulgite, hydrophilic Type fumed silica 3 parts, silane coupling agent 1.0 parts. Wherein, the specific surface area of ​​the enhanced graphene is 250m 2 / g, the pH value is 7.0; the epoxy equivalent of the mixed epoxy resin is 117~127g / eq; the particle diameter of the nano-scale attapulgite is 300nm; the hydrophilic fumed silica The specific surface area (BET method) is 400m 2 / g.

[0052] The components and parts contained in the B component are: 90 parts of modified polyamide, 10 parts of flexible polyamide, 5 parts of ATBN reactive li...

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Abstract

The invention provides a high-strength epoxy structural adhesive for adhering carbon fiber composite materials. The high-strength epoxy structural adhesive consists of A component and B component; the A component comprises the following components in parts by weight: 40-60 parts of epoxy resin/polybutadiene rubber polymer, 40-60 parts of mixed type epoxy regin, 0.2-0.5 part of graphene, 5-10 parts of SBM/MAM copolymer, 6-10 parts of flexibilizer, 1-5 parts of attapulgite, 1-5 parts of gas-phase method silicon dioxide and 0.5-1.5 parts of coupling agent; and the B component comprises the following components in parts by weight: 85-95 parts of polyamide, 5-15 parts of flexible polyamide, 3-8 parts of ATBN reactive liquid polymer and 1-5 parts of gas-phase method silicon dioxide. The adopted epoxy structural adhesive in the technical scheme of the invention is high in adhesion strength when being used between the carbon fiber composite materials, and achieves the effect that adhered surface of the carbon fiber composite materials is destroyed.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to a high-strength epoxy structural adhesive used for bonding carbon fiber composite materials. Background technique [0002] Because of its light weight, high strength and easy cutting, carbon fiber composite materials have been widely used as structural materials in aerospace, military industry, rail transit, water transportation, automobiles, sports equipment, electronic and electrical products and other fields. Carbon fiber composite materials are generally bonded together by structural adhesives, and the bonding strength of structural adhesives directly affects the performance of products prepared from carbon fiber composite materials. At present, the epoxy structural adhesive used between carbon fiber composite materials and carbon fiber composite materials has low bonding strength, and because of the low surface activity of carbon fiber body, there is currently no suitable pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J109/00C09J11/08C09J11/04C09J11/06
Inventor 秦建
Owner SHENCAI TECH SHENZHEN CO LTD
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