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Light-weight broadband multilayer structural wave-absorbing composite material and preparation method thereof

A multi-layer structure and composite material technology, applied in chemical instruments and methods, lamination, lamination devices, etc., can solve problems such as poor mechanical strength, difficulty in controlling the distribution uniformity of wave-absorbing particles, and insufficient absorption frequency band

Active Publication Date: 2019-04-23
CASHEM ADVANCED MATERIALS HI TECH CO LTD ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The wave-absorbing materials reported above are difficult to control the distribution uniformity of wave-absorbing particles, and the thickness and weight of the prepared materials are affected by the precision of the rolling process and the material. They all have the disadvantages of not having a wide enough absorption frequency band and poor mechanical strength, and cannot produce high-quality materials. foam structure absorbing material

Method used

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  • Light-weight broadband multilayer structural wave-absorbing composite material and preparation method thereof
  • Light-weight broadband multilayer structural wave-absorbing composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The wave absorbing agent superconducting carbon black (ECPEC600JD) 40%, lanthanum tin doped wave absorbing agent surface treatment agent 1.3%, dispersant sodium dodecylbenzene sulfonate 5%, polymer bismaleimide resin 36% %, added to the three-roll mill to disperse and then mixed in the high-speed mixer, after fully mixed, evenly coated on the surface density of 100g / m 2 24% surface of glass fiber cloth, as the surface material.

[0038] Coat the polymer uniformly to 50% of the mass at 2-18GHz, the dielectric constant is 2.0-5, the dielectric loss is 0.1-0.3, and the density is 75kg / m 3 The wave-absorbing PMI foam material and the wave-absorbing adhesive film electric loss body resistor sheet have a square resistance of 35Ω / port and a mass of 20%.

[0039] Add 5% of the wave absorbing agent conductive carbon black, 2% of the lanthanum tin-doped wave absorbing agent surface treatment agent, 5% of the dispersant sodium dodecylbenzene sulfonate, and 25% of the polymer epox...

Embodiment 2

[0043] Add 40% of conductive carbon black as wave absorbing agent, 1% of lanthanum tin-doped wave absorbing agent as surface treatment agent, 15% of lecithin as dispersing agent, and 26% of polymer epoxy resin into a three-roll mill for dispersion and then pass through high-speed Mix in a mixer, after fully mixing, evenly coat on surface density of 100g / m 2 24% of the surface of the quartz fiber cloth, as the surface material.

[0044] Coat the polymer evenly to 50% of the mass at 2-18GHz, the dielectric constant is 2.0-5, the dielectric loss is 0.2-0.5, and the density is 75kg / m 3 The wave-absorbing PMI foam material and the wave-absorbing adhesive film electric loss body resistor sheet have a square resistance of 50Ω / port and a mass of 20%.

[0045] Add 5% of multi-walled carbon nanotubes as absorbing agent, 0.5% of lanthanum-tin-doped absorbing agent as surface treatment agent, 5% as lecithin as dispersing agent, and 37% as polymer epoxy resin. After mixing in a high-spee...

Embodiment 3

[0049] Add 35% single-walled carbon nanotube powder as absorbing agent, 0.8% surface treatment agent doped with lanthanum-tin absorbing agent, 15% polyethylene wax as dispersant, and 26% polymer cyanate resin to three-roll grinding After being dispersed in the machine, it is mixed in a high-speed mixer, and after being fully mixed, it is evenly coated on the surface with a surface density of 100g / m 2 24% surface of glass fiber cloth, as the surface material.

[0050] Coat the polymer evenly to 50% of the mass at 2-18GHz with a dielectric constant of 2.0-5, a dielectric loss of 0.2-0.5, and a density of 110kg / m 3 The wave-absorbing PMI foam material and the wave-absorbing adhesive film electric loss body resistor sheet have a square resistance of 90Ω / port and a mass of 20%.

[0051] The wave absorbing agent multi-walled carbon nanotubes is 8%, the lanthanum tin doped wave absorbing agent surface treatment agent is 1.8%, the dispersant polyethylene glycol and polyethylene glyco...

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Abstract

The invention relates to the field of new material preparation, in particular to a light-weight broadband multilayer structural wave-absorbing composite material and a preparation method thereof. Thelight-weight broadband multilayer structural wave-absorbing composite material provided by the invention comprises three parts: a surface layer, a sandwich layer and a bottom plate. The wave-absorbingcomposite material has the characteristics of large absorption frequency bandwidth, good low-frequency performance, low surface density, high mechanical strength and the like; the bearing performanceand engineering application value of the wave-absorbing composite material are improved; and the preparation method is mature and stable, can realize large-scale continuous production, easily forms industrialization and can be applied in military and civilian fields. In the military field, the light-weight broadband multilayer structural wave-absorbing composite material is mainly used in stealthaircrafts, stealth missiles, stealth ships and the like. In the civilian field, the light-weight broadband multilayer structural wave-absorbing composite material is mainly used in high-rise buildings, medical equipment, electronic information and the like.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a light-weight broadband multilayer structure wave-absorbing composite material and a preparation method thereof. Background technique [0002] A wave-absorbing material is a functional material that can absorb incident electromagnetic waves and effectively lose the energy of incident electromagnetic waves through various electromagnetic loss mechanisms. In recent years, with the increasing demand for microwave-absorbing materials for military and civil electromagnetic waves, various electromagnetic wave-absorbing materials have been widely researched and prepared. The current wave-absorbing materials are mainly ferrite, metal powder, polycrystalline / amorphous fibers. The absorber is a coating absorbing material, but because the coating absorbing material has no load-carrying capacity, high surface density, poor weather resistance and other characteristics, its application pro...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B17/02B32B17/12B32B37/06B32B37/10
CPCB32B5/02B32B5/08B32B5/26B32B37/06B32B37/10B32B2262/10B32B2262/101B32B2262/106B32B2262/14
Inventor 常艺董艳丽李克迪徐文生李峰毛敏梁孟佳丽
Owner CASHEM ADVANCED MATERIALS HI TECH CO LTD ZHEJIANG
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