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Pyrolysis carbonyl iron coating carbon fiber and preparation method thereof

A carbon fiber, carbonyl iron technology, applied in the direction of carbon fiber, fiber processing, textile and paper making, etc., can solve the problems of poor impedance matching, high dielectric constant, etc., achieve good absorbing performance, simple preparation method, rich design and preparation science Effect

Pending Publication Date: 2022-03-29
HUNAN BOOM NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortcomings and deficiencies of the carbon fiber's high dielectric constant and poor impedance matching in the prior art, the purpose of the present invention is to provide a pyrolytic carbonyl iron coating with good wave-absorbing performance in a very wide frequency range. Layer carbon fiber and its preparation method,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] S1 Cut the carbon fiber into 30cm long, then knot the two ends of the carbon fiber, put the knotted fiber into the tube furnace, burn at a high temperature of 500°C for 40min, take it out after cooling; cut into chopped carbon fiber;

[0033] S2 carbon fiber is dried at 80°C for 10 hours;

[0034] S3 is a closed reaction kettle, add about 2 / 3 of the solvent to each of the six gas washing bottles, pass nitrogen, and use soapy water to test whether the lid of the reaction kettle is leaking. If there is no bubble, the reaction kettle is sealed and qualified.

[0035] S4 Add 500 g of carbon fiber and 12 kg of solvent xylene into the barrel, and disperse with a disperser at a high speed of 800 rpm for 30 min.

[0036] S5 adds the dispersed xylene fiber soaking solution into the reaction kettle; weighs a certain amount of iron pentacarbonyl into the reaction kettle, rinses the carbonyl iron container and funnel with the remaining xylene; quickly closes the reaction kettle, an...

Embodiment 2

[0045] S1 Cut the carbon fiber into 40cm long, then knot the two ends of the carbon fiber, put the knotted fiber into the tube furnace, burn at 500°C for 40 minutes, take it out after cooling; cut into chopped carbon fiber;

[0046] S2 carbon fiber is dried at 80°C for 12 hours;

[0047] S3 is a closed reaction kettle, add about 2 / 3 of the solvent to each of the six gas washing bottles, pass nitrogen, and use soapy water to test whether the lid of the reaction kettle is leaking. If there is no bubble, the reaction kettle is sealed and qualified.

[0048] S4 Add 500 g of carbon fiber and 10 kg of solvent xylene into the barrel, and disperse for 20 min at high speed with a disperser at 1000 rpm.

[0049]S5 adds the dispersed xylene fiber soaking solution into the reaction kettle; weighs a certain amount of iron pentacarbonyl into the reaction kettle, rinses the carbonyl iron container and funnel with the remaining xylene; quickly closes the reaction kettle, and feeds nitrogen ga...

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Abstract

The invention belongs to the technical field of wave-absorbing material preparation, and discloses a pyrolytic carbonyl iron coating carbon fiber and a preparation method thereof.The surface of the coating carbon fiber is evenly coated with a micro-nano iron coating, the preparation method comprises the steps that pretreated carbon fiber is dispersed in an organic solvent to obtain a solution containing the carbon fiber, carbonyl iron is added to obtain slurry, and the slurry is subjected to vacuum drying to obtain the pyrolytic carbonyl iron coating carbon fiber. And carrying out pyrolytic reaction and solid-liquid separation in a protective atmosphere, cleaning the obtained solid phase, soaking the solid phase in a mixed solution containing a coupling agent, and drying to obtain the coated carbon fiber. The coated carbon fiber finished product has the magnetic saturation strength of more than 15 emu / g, has strong magnetism and light weight, and can be added into foam, honeycomb or wave-absorbing coatings to achieve the effects of wave absorption and enhancement.

Description

technical field [0001] The invention belongs to the technical field of preparation of wave-absorbing materials, and in particular relates to a pyrolysis carbonyl iron-coated carbon fiber and a preparation method thereof. Background technique [0002] Absorbing materials for radar stealth are widely used in the stealth defense systems of military platforms such as ocean and land, which can effectively reduce the target radar reflection area and make the target more difficult to be found. In order to obtain microwave absorbing materials with excellent performance, combining magnetic loss with dielectric materials is an effective way to improve electromagnetic wave absorption characteristics. Carbon fiber has high specific strength and specific modulus, and also has excellent performance in conductivity, reflection and absorption, electromagnetic shielding, and electronic countermeasures. It is an ideal absorbing material with dual functions of mechanical load bearing and reduc...

Claims

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Application Information

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IPC IPC(8): D06M11/83D06M101/40
CPCD06M11/83D06M2101/40Y02E60/10
Inventor 黄小忠陈解放鲁先孝刘鹏
Owner HUNAN BOOM NEW MATERIALS
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