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Resin for pultrusion of carbon fiber composite material as well as preparation and use methods of resin

A technology of composite materials and composite resins, applied in shielding materials, electrical components, magnetic field/electric field shielding, etc., to achieve the effect of low viscosity, simple preparation process and fast curing

Pending Publication Date: 2020-09-15
NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on pultrusion resins used in the field of electromagnetic shielding, and there is no report on pultrusion resins that meet the requirements of the pultrusion process for resin systems with low viscosity, high activity, excellent performance, and electromagnetic performance compensation.

Method used

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  • Resin for pultrusion of carbon fiber composite material as well as preparation and use methods of resin

Examples

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Effect test

preparation example Construction

[0024] A method for preparing resin for pultrusion of carbon fiber composite material includes the following steps:

[0025] S1. The epoxy resin system, unsaturated resin system, and internal mold release agent are added in order according to the mass percentage components, and the composite resin system is prepared by dispersing for 5 min-10 min using a high-speed mixer;

[0026] S2. Add the toughening agent and active diluent to the composite resin system in S1 according to the mass percentage, and use a high-speed mixer to disperse for 5-10 minutes to obtain a low-viscosity composite resin system;

[0027] S3. Add the chopped conductive fibers to the S2 medium and low viscosity composite resin system according to the mass percentage, and use a high-speed mixer to disperse for 30 minutes to prepare a composite resin system to obtain a pultruded electromagnetic shielding carbon fiber composite resin.

[0028] A method for using resin for pultrusion of carbon fiber composite materials....

Embodiment 1

[0030] This embodiment provides a pultruded electromagnetic shielding carbon fiber composite resin, which includes the following components by mass percentage:

[0031] Weigh 30 parts of epoxy resin E51, 20 parts of methyltetrahydrophthalic anhydride, 30 parts of unsaturated resin, 2 parts of benzoyl peroxide, 5 parts of 1,4-butyrolactone, 3 parts of carboxyl-terminated liquid nitrile rubber , 3 parts of internal release agent, 5 parts of 1mm length chopped nickel-plated carbon fiber, 2 parts of 1mm stainless steel fiber, add to the mixing tank and stir evenly for use;

[0032] The measured viscosity of the above resin system is: 650mPa·s;

[0033] Pultruded electromagnetic shielding carbon fiber composite material, the design fiber volume content is 65%, such as figure 1 , The tensioning device is arranged in order from top to bottom as carbon fiber cloth 11, carbon fiber yarn 12, carbon fiber yarn 12 and carbon fiber cloth 11. A preforming mold 5 and a curing mold 6 are sequentiall...

Embodiment 2

[0040] This embodiment provides a pultruded electromagnetic shielding carbon fiber composite resin, which includes the following components by mass percentage:

[0041] Weigh 50 parts of epoxy resin TDE-85, 5 parts of dimethylimidazole, 20 parts of unsaturated resin, 2 parts of benzoyl peroxide, 5 parts of butyl glycidyl ether, 5 parts of ethylene glycol diglycidyl ether. , 3 parts carboxyl-terminated liquid nitrile rubber, 5 parts internal release agent, 3 parts 1mm length chopped nickel-plated carbon fiber, 2 parts magnetic nano-modified zinc oxide whiskers. Add to the mixing tank and stir evenly for later use;

[0042] The measured viscosity of the above resin system is: 450mPa·s;

[0043] Pultruded electromagnetic shielding carbon fiber composite material, design fiber content 60% (volume content), such as figure 1 , The tensioning device is arranged in order from top to bottom as carbon fiber cloth 11, carbon fiber yarn 12, carbon fiber yarn 12 and carbon fiber cloth 11. A pref...

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Abstract

The invention discloses resin for pultrusion of a carbon fiber composite material. The resin comprises 30%-60% of an epoxy resin system, 10%-30% of an unsaturated resin system, 2%-5% of a flexibilizer, 3%-5% of an internal releasing agent, 5%-10% of an active diluent and 3%-8% of chopped conductive fibers. The method can be used for pultrusion of the electromagnetic shielding carbon fiber composite material, meets the requirements of low reaction viscosity, high activity and good strength of a resin system in the pultrusion process, and can utilize the fiber conductive enhancer in the resin system to supplement the defect that the electromagnetic performance of the material is independently improved by the reinforced fibers. By optimizing the combination of the resin and combining with thepultrusion electromagnetic shielding carbon fiber plate, the effect that the shielding effectiveness is greater than 40dB under 150KHz-18GHz is achieved. Meanwhile, due to the particularity of the fiber conductive enhancer in the resin, the invention provides a pultrusion process method using the resin system.

Description

Technical field [0001] The invention relates to the field of electromagnetic shielding materials and the technical field of advanced composite materials, and more specifically to a resin for pultrusion of carbon fiber composite materials, preparation and use methods. Background technique [0002] As the electromagnetic shielding field has more and more stringent requirements for weight reduction of various protective equipment, the application of new materials in various shielding products has gradually increased, but the current research is mostly on lightweight metal alloy materials. However, advanced composite materials represented by carbon fiber composite materials are affected by their electrical properties, which limit their development in this field. How to apply new materials with excellent mechanical properties and lower density in the field of weight reduction and electromagnetic protection has become the focus of attention. At present, there are mainly three types of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L101/00C08L13/00C08K7/06C08K9/02C08K5/14C08K13/06C08K7/08B29C70/52B29C70/54H05K9/00
CPCC08L63/00C08L101/00B29C70/523B29C70/525B29C70/54H05K9/009C08K2201/014C08K2201/001C08K2201/011C08L2205/03C08L13/00C08K7/06C08K9/02C08K5/14C08K13/06C08K7/08
Inventor 王富强刘艳李炳章张少波李伟郭文卿王永胜
Owner NO 33 RES INST OF CHINA ELECTRONICS TECHNOOGY GRP
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