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Prepreg with electromagnetic shielding function and preparation method thereof

A technology of electromagnetic shielding and prepreg, which is applied in the field of functional composite materials, can solve the problems of poor quality controllability of composite structural parts, uneven understanding of electromagnetic wave characteristics, and inability to give full play to the designability of composite materials. Excellent performance, high quality stability, and stable shielding performance

Inactive Publication Date: 2021-01-29
嘉兴得一复合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is simple, but the cost is high and the reliability is low, and it cannot take advantage of the designability of composite materials
It is an ideal design scheme to build electromagnetic wave materials in composite materials, but at present, due to the uneven understanding of the electromagnetic wave characteristics of composite materials, electromagnetic wave characteristic materials (such as wave absorbers) and electromagnetic shielding materials (such as shielded copper mesh) will be damaged when built. Second, because the construction of these materials is different from that of composite materials, the level of construction personnel is limited, resulting in poor quality controllability of composite structural parts prepared by this method

Method used

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  • Prepreg with electromagnetic shielding function and preparation method thereof
  • Prepreg with electromagnetic shielding function and preparation method thereof
  • Prepreg with electromagnetic shielding function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation method of prepreg with electromagnetic shielding function:

[0034] 1) Each component of dicyandiamide epoxy resin system, unidirectional D glass fiber yarn, toughening agent CMP-410, carbon nanotube (F-CNT), nickel mesh SN354-300 (hole distance 0.8mm) Dry at 60°C for 9 hours;

[0035] 2) Mix each component of the dicyandiamide epoxy resin system in step 1) uniformly, heat to a molten state, and mix uniformly with CMP-410 and carbon nanotubes (F-CNT) to obtain a prepreg resin mixture;

[0036] 3) the unidirectional D glass fiber yarn of step 1) is regularly arranged on the yarn guide system of the prepreg machine;

[0037] 4) Apply the unidirectional D glass fiber yarn of step 3) to both sides of the nickel mesh in step 1), to obtain a reinforcing material mixture;

[0038] 5) The prepreg resin mixture in step 2) is combined with the upper and lower sides of the reinforcing material mixture obtained in step 4) through a one-step hot-melt prepreg machine to...

Embodiment 2

[0043] 1) Dry cyanate resin, T800 carbon fiber yarn, toughening agent SA-2000, carbon nanotube (F-CNT), and carbon nanotube film (0.5 mm in thickness) in an atmosphere at 100 ° C for 2 hours;

[0044] 2) heating the cyanate resin in step 1) to a molten state, and mixing it with the toughening agent SA-2000 and carbon nanotubes (F-CNT) to obtain a prepreg resin mixture;

[0045] 3) regularly arrange the T800 carbon fibers in step 1) on the yarn guide system of the prepreg machine;

[0046] 4) Paste the T800 carbon fiber of step 3) on both sides of the carbon nanotube film of step 1) to obtain a reinforcing material mixture;

[0047] 5) Combine the prepreg resin mixture in step 2) on both sides of the reinforcing material mixture obtained in step 4) through a one-step hot-melt prepreg machine to obtain an electromagnetic shielding prepreg. The prepreg temperature is 100°C, and the hot-melt pressure is 2 MPa;

[0048] Composite material prepreg performance test results:

[004...

Embodiment 3

[0055] 1) Dry Shuangma resin, T700 carbon fiber 3K plain weave cloth, toughening agent SA-2000, aminated graphene XF005-4, and carbon nanotube film (thickness 0.5 mm) in an atmosphere of 900 ° C for 5 hours;

[0056] 2) heating the double horse resin resin in step 1) to a molten state, and mixing it with the toughening agent SA-2000 and aminated graphene to obtain a prepreg resin mixture;

[0057] 3) regularly arrange the T700 carbon fiber cloth of step 1) on the yarn guide system of the prepreg machine;

[0058] 4) Applying the two sides of the carbon nanotube film in step 1) to the two sides of the T700 carbon fiber cloth in step 3), to obtain a reinforcing material mixture;

[0059] 5) Compounding the prepreg resin mixture in step 2) on both sides of the reinforcing material mixture obtained in step 4) through a one-step hot-melt prepreg machine to obtain an electromagnetic shielding prepreg. Prepreg temperature 120°C, hot melt pressure 1MPa

[0060] Prepreg performance t...

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Abstract

The invention belongs to the technical field of functional composite materials, and particularly relates to a prepreg with an electromagnetic shielding function and a preparation method thereof. The preparation method includes the specific steps that a resin matrix, a flexibilizer and nanofiller are mixed to be uniform, then the mixture is compounded with a fiber layer and an electromagnetic shielding layer through a hot melting method preimpregnation process, and the electromagnetic shielding prepreg is obtained. The prepreg has the characteristics of excellent manufacturability, stable electromagnetic shielding performance, high shielding effect and good mechanical properties. An electromagnetic shielding composite material product prepared from the prepreg has the characteristics of reliable shielding effect and no process influence, and can be used for preparing a composite material product with an electromagnetic shielding function.

Description

technical field [0001] The invention belongs to the technical field of functional composite materials, and in particular relates to a prepreg with electromagnetic shielding function and a preparation method thereof. Background technique [0002] Electromagnetic radiation poses a great challenge to the safety of equipment use and human body safety. Preventing electromagnetic radiation or utilizing electromagnetic radiation has become an important assessment index for equipment development. With the improvement of lightweight requirements, the use of resin-based composite materials continues to increase, but the current method of endowing resin-based composite materials with electromagnetic wave characteristics is generally to spray electromagnetic materials on the outer surface or install electromagnetic wave protection devices. This method is simple, but has high cost and low reliability, and cannot take advantage of the designability of composite materials. It is an ideal ...

Claims

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Application Information

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IPC IPC(8): C08J5/24C08L63/00C08L79/04C08L77/10C08K7/14C08K7/06C08K3/04C08K3/34
CPCC08J5/24C08J2363/00C08J2479/04C08J2477/10C08K7/14C08K7/06C08K3/04C08K3/34C08K2201/005C08K2201/011
Inventor 魏鑫景大帅
Owner 嘉兴得一复合材料科技有限公司
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