Wave-absorbing/lightweight structure integrated foam material and preparation method and application thereof

Abstract

The invention provides a wave-absorbing/lightweight structure integrated foam material as well as a preparation method and application thereof, and belongs to the technical field of advanced materials. The foam material is prepared from the following raw materials in parts by weight: 100 parts of a matrix resin monomer, 1-30 parts of a foaming agent, 0.05-15 parts of an initiator, 0-10 parts of a cross-linking agent, 0.5-50 parts of a tackifier and 1-100 parts of a wave absorbing agent. After a wave-absorbing agent is added into the foam material, a good foaming effect can still be achieved, and the wave-absorbing foam material with a uniform foam structure is obtained. The foam material is excellent in mechanical property, thermal mechanical property and wave absorbing property, and light and adjustable in functional weight. The foam material disclosed by the invention can be used as a light wave-absorbing structure and function integrated material with excellent performance, is used for preparing a structure/stealth integrated broadband wave-absorbing material with high strength, heat resistance and corrosion resistance, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of advanced materials, and in particular relates to a wave absorbing / lightweight structure integrated foam material and a preparation method and application thereof. Background technique [0002] Polymethacrylimide foam (PMI) is a cross-linked, uniform pore size distribution foam with excellent structural stability and high mechanical strength. Polymethacrylimide foam has higher specific strength, specific modulus, heat resistance and damp heat resistance than other polymer foam materials, as well as better high temperature creep resistance and dimensional stability. Its outstanding heat resistance and excellent creep resistance at high temperature enable it to withstand the high temperature curing process conditions of thermosetting resin composite materials such as epoxy and double horse, and can realize one-time co-curing molding of foam sandwich and prepreg. It can be widely used in the manufacture of c...

AI Technical Summary

Problems solved by technology

At present, adding a wave absorbing agent to the foam material is the most common method to endow it with wave absorbing properties, but adding a wave absorbing agent will cause settlement or even failure to foam, thus affecting the performance of the polymethacrylimide foam material itself. Wave performance also failed to improve

If the traditional free radical polymerization method is used to prepare PMI foam, it needs to stand in a water bath for a long time. During this process, the high-density wave-absorbing functional body is prone to sedimentation, resulting in uneven dispersion in the PMI foam, which seriously affects the PMI foam. performance

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