Method for preparing electromagnetic shielding composite material with ferrum-based amorphism/ nanocrystalline strip serving as patch layer

Abstract

Provided is a method for preparing an electromagnetic shielding composite material with a ferrum-based amorphism / nanocrystalline strip serving as a patch layer. The method comprises processing steps of (1) plasticating isobutylene-isoprene rubber (IIR) on an open type rubber refining machine for 3-10 minutes, then adding rubber compounding agents (known technology) with fixed types and proportion, mixing for about 15-60 minutes to enable a compound phase to be evenly dispersed in the IIR, mixing plastication rubber with white carbon black with proportion of 4:1-6:1 by mass, and producing an IIR film with thickness of 0.1-1mm; (2) compounding carbon fibers with the IIR film to produce an IIR film / carbon fiber / IIR film interlayer structure, and sulfide forming in a pressure forming machine with sulfide temperature at 165 DEG C, sulfide time for 1-5 hours and sulfide pressure at 1-10 MPa; and (3) selecting ferrum-based amorphism / nanocrystalline alloy strips under unannealed conditions and with different thicknesses to produce the surface conductive type electromagnetic shielding composite. The method has the advantages that (1) by means of recycle of waste strips, the processing problem of the waste strips can be effectively solved so that the method has high economic benefits and environmental benefits; and (2) the preparation process of the method is simple in process, low in equipment requirement, remarkable in effect and favorable for achieving large-scale industrialized application.

Description

technical field [0001] The invention relates to a preparation method of an electromagnetic shielding composite material which uses an iron-based amorphous / nanocrystalline strip material as a patch layer. Background technique [0002] With the rapid development of modern science and technology, various electronic and electrical equipment products have entered various fields of work and life, and electromagnetic radiation pollution has immediately become a major problem that cannot be ignored. Scientific research has confirmed that man-made electromagnetic pollution has become a new type of social public hazard. The harm caused by electromagnetic radiation mainly has the following three aspects: First, the energy of electromagnetic radiation may affect the normal operation of various electronic devices that human life increasingly relies on. The operation, the normal transmission of communication signals, etc. will affect or even cause serious harm, thus forming Electromagnet...

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Problems solved by technology

[0003] Iron-nickel-based alloy materials are the most widely used electromagnetic shielding materials at present. However, the cost of iron-nickel-based electromagnetic shielding materials is too high to be suitable for wide-scale promotion and use. The price of iron-based amorphous / nanocrystalline alloys is relatively higher than that of other non-crystalline materials. Crystalline alloys have certain advantages; at the same time, in the actual production process of amorphous / nanocrystalline strips, due to various factors, the strips will have defects such as unilateral, burrs, and pores, and the one-time unqualified strips Occupying a large proportion, if a large amount of waste strip is returned to the furnace for reuse or crushed and ground into powder to make magnetic powder cores, the cost required is relatively high

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