Preparation method of microwave absorbing rubber composite material

A composite material and microwave absorption technology, which is applied in the field of preparation of functional polymer materials, can solve the problem that the microwave reflectivity does not change significantly, and achieve the effect of improving microwave absorption performance and absorption frequency range
CN102108174BInactive Publication Date: 2012-08-22SHANGHAI JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI JIAOTONG UNIV
Publication Date
2012-08-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a microwave absorbing rubber composite material. In the method, hydrogenated nitrile-butadiene rubber (HNBR) and ethylene propylene rubber (EPM) which are incompatible are blended to form a matrix of the rubber composite material, and a phase separation structure of the obtained blend which is formed in the matrix can control the distribution of multi-walled carbon nanotubes (MWNTs) and carbonyl iron powder (CIP) in the rubber composite material, thus improving the microwave absorbing property of the rubber composite material. In the invention, the microwave absorbing rubber composite material is prepared by utilizing a one-time blending method and a multi-stage blending method. Compared with the rubber composite material which takes single HNBR as a matrix, the rubber composite material prepared from 10 parts by weight of the MWNTs and 100 parts by weight of the CIP by the one-time blending method has the advantages that the microwave reflectivity is reduced from minus 17.5dB to minus 40.5dB and the absorption frequency range is improved by 1.12GHz; and the rubber composite material prepared by the multi-stage blending method has the advantages that the microwave reflectivity is reduced from minus 17.5dB to minus 33.2dB and the absorption frequency range is improved by 0.24GHz.
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Description

technical field

[0001] The invention relates to a preparation method of a functional polymer material, in particular to a preparation method of a microwave-absorbing rubber composite material. Background technique

[0002] In the information age, the widespread use of electronic and electrical equipment forms a complex electromagnetic environment, which brings problems such as electromagnetic radiation and electromagnetic interference. As a very common type of electromagnetic waves, microwaves will have adverse effects on human health and the operation of precision electronic instruments. Microwave absorbing materials can weaken or eliminate the microwave incident on the surface of the object, and are an important means to control microwave electromagnetic pollution.

[0003] In modern warfare, the requirements for the stealth performance of weapons and equipment are getting higher and higher, which requires stealth materials to meet the requirements of strong microwave abs...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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