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Electromagnetic shielding compound material made from three-dimensional braided nickel-plated carbon fiber and epoxy resin and method for preparing same

A technology of nickel-plated carbon fiber and epoxy resin, applied in chemical instruments and methods, and other chemical processes, can solve the problems of undisclosed three-dimensional braided fiber shielding composite materials, etc., and achieve good electromagnetic shielding performance

Inactive Publication Date: 2009-09-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there have been published reports of 2D planar braided fiber composites as shielding composites, no 3D braided fiber shielding composites have been disclosed so far

Method used

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  • Electromagnetic shielding compound material made from three-dimensional braided nickel-plated carbon fiber and epoxy resin and method for preparing same
  • Electromagnetic shielding compound material made from three-dimensional braided nickel-plated carbon fiber and epoxy resin and method for preparing same
  • Electromagnetic shielding compound material made from three-dimensional braided nickel-plated carbon fiber and epoxy resin and method for preparing same

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Embodiment Construction

[0043] The present invention is described in detail with reference to accompanying drawing: the RTM that the present invention uses is as image 3 As shown, 1—pressure bottle, 2—glue storage tank, 3—completely mixed resin, 4—one-way valve, 5—mold, 6—glue collector, 7—vacuum pump.

[0044] Main operating steps of the present invention are as follows:

[0045] 1. Carbon fiber surface treatment: During the production process of carbon fiber, its fiber surface will inevitably contain grease, organic pyrolysis products and other environmental media. Therefore, in order to ensure the implementation of the nickel plating process, it is necessary Do preprocessing. The method of immersing the cleaned carbon fiber in 65% concentrated nitric acid for 1 hour can be attributed to three aspects:

[0046] 1) Dissolve and remove grease, organic pyrolysis products and environmental impurities on the surface of carbon fiber, improve the conductivity of the fiber, and facilitate the implementa...

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Abstract

The invention relates to an electromagnetic shielding compound material made from three-dimensional braided nickel-plated carbon fiber and epoxy resin and a method for preparing same. The method comprises the following steps: carbon fiber surface treatment, carbon fiber nickel-electroplating, nickel-plated carbon fiber three-dimensional braiding, and compound material preparation on the basis of RTM (resin transfer molding) method and electromagnetic shielding effectiveness test. In the invention, the nickel-plated carbon fiber / epoxy resin braided compound material is prepared through the following steps: plating the carbon fiber with nickel, the metal; carrying out three-dimensional four-directional braiding; and then, compounding the nickel-plated carbon fiber braid and the epoxy resin. Owing to the good conductivity of the carbon fiber braid and the nickel-plated layer and the ferromagnetism of the nickel-plated layer, the braided compound material has good electromagnetic shielding performance. According to the test results based on the flange co-axial method, the electromagnetic shielding level of the braided compound material reaches 70dB to 80dB.

Description

technical field [0001] The invention relates to the preparation of electromagnetic shielding composite materials, in particular to a three-dimensional braided nickel-plated carbon fiber and epoxy resin electromagnetic shielding composite material and a preparation method. Background technique [0002] Today, as electronic products are becoming more and more popular, while people enjoy the convenience it brings, an invisible hazard is also becoming more and more serious. On the one hand, misoperations and accidents caused by electromagnetic interference are frequently reported; on the other hand, the harm of electromagnetic radiation to the human body is gradually recognized by people. In addition, electromagnetic radiation can also cause the leakage of state secrets and endanger national security. Therefore, governments of various countries have put Electromagnetic Interference (EMI for short) on the agenda and formulated relevant regulations. Metal is a good electromagnet...

Claims

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Application Information

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IPC IPC(8): C08L63/00C09K3/00
Inventor 万怡灶黄远何芳罗红林王玉林
Owner TIANJIN UNIV
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