Preparation method of ZSM-5 zeolite/polycrystalline iron fiber/resin composite adsorption material, and composite material and preparation method thereof

A technology of composite adsorption materials and resin composite materials, which is applied in the direction of chemical instruments and methods, silicon compounds, alkali metal compounds, etc., can solve the problems of reduced fiber magnetic permeability, reduced impedance matching characteristics, and complex processes, etc., to achieve easy large-scale The effect of promotion, low cost and simple method

Active Publication Date: 2021-03-26
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method reduces the dielectric constant by increasing the resistivity of the polycrystalline iron fiber. The processing process is cumbersome and the process is complicated. The magnetic permeability of the processed fiber tends to decrease, resulting in a corresponding decrease in impedance matching characteristics.

Method used

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  • Preparation method of ZSM-5 zeolite/polycrystalline iron fiber/resin composite adsorption material, and composite material and preparation method thereof
  • Preparation method of ZSM-5 zeolite/polycrystalline iron fiber/resin composite adsorption material, and composite material and preparation method thereof
  • Preparation method of ZSM-5 zeolite/polycrystalline iron fiber/resin composite adsorption material, and composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] Add 5 g of polycrystalline iron fibers to 50 mL of dilute ammonia water with a volume concentration of 0.5%, stir for 30 minutes and then filter to obtain polycrystalline iron fibers washed with ammonia water; add the polycrystalline iron fibers washed with ammonia water to 50 mL of PDDA with a content of 0.5 % 1mol / L NaCl solution, stirred for 30min, then suction filtered, and washed with dilute ammonia water for several times to obtain surface-modified polycrystalline iron fibers with positive charges.

[0032] Add 0.25g of ZSM-5 nano-crystal seeds with a particle size of 50-100nm into 25mL of dilute ammonia water with a volume concentration of 0.5% according to 1% mass ratio, ultrasonically disperse for 30min, and then add 2.5g modified Stir for 30 minutes mechanically, put the magnet on the side of the container beaker, layer, let it stand for 10 minutes, pour out the solution by pouring, remove the magnet, then add 25ml of dilute ammonia water with a volume concentr...

Embodiment approach 2

[0038] Prepare and test the ZSM-5 zeolite / polycrystalline iron fiber composite adsorption material according to the method and parameters shown in Embodiment 1, change the PDDA concentration to 0.1%, change the NaCl concentration to 0.5mol / L, and change the crystallization temperature and time to 80°C and 72h, the obtained ZSM-5 zeolite / polycrystalline iron fiber composite adsorption material has a dielectric constant in the range of 30-16 and a magnetic permeability in the range of 1.10-0.76.

Embodiment approach 3

[0040] Prepare and test the ZSM-5 zeolite / polycrystalline iron fiber composite adsorption material according to the method and parameters shown in Embodiment 1, the PDDA concentration is changed to 0.3%, the modified polycrystalline iron fiber is changed to 3.5g, and the crystallization temperature and time are changed to 90°C and 36h, the dielectric constant range of the obtained ZSM-5 zeolite / polycrystalline iron fiber composite adsorption material is 25-8, and the magnetic permeability range is 1.08-0.78.

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Abstract

The invention relates to the technical field of preparation of wave absorbing materials, and discloses a preparation method of a ZSM-5 zeolite / polycrystalline iron fiber / resin composite adsorbing material taking polycrystalline iron fibers as a carrier and a zeolite layer as a surface coating layer, and a composite material and a preparation method thereof. According to the invention, by using polycrystalline iron fibers as a carrier, after a nano ZSM-5 zeolite seed is adsorbed, a ZSM-5 zeolite layer with low electromagnetic performance is loaded on the surface of polycrystalline iron fiber for modification through hydrothermal treatment, so that the electromagnetic performance of the polycrystalline iron fiber is reduced, and the ZSM-5 zeolite / polycrystalline iron fiber composite wave-absorbing material with high electromagnetic wave absorptivity in a relatively wide frequency band is prepared. According to the invention, the thickness of the zeolite layer is controlled by adjusting preparation conditions to realize regulation and control of the dielectric constant of the polycrystalline iron fiber.

Description

technical field [0001] The invention relates to the technical field of preparation of wave-absorbing materials, in particular to a preparation method of a ZSM-5 zeolite / polycrystalline iron fiber / resin composite adsorption material, a composite material and a preparation method. Background technique [0002] Polycrystalline iron fiber is a new type of absorbent material with excellent performance, which can effectively reduce the density of the absorbing coating. The absorbing material prepared by it can effectively improve the electromagnetic wave absorption capacity and broaden the absorption band width and achieve high-efficiency absorption. In addition, polycrystalline iron fibers also have the advantages that the absorption is independent of the incident angle, so they have broad application prospects in the field of microwave absorption. [0003] However, polycrystalline iron fibers have low resistivity, permittivity much greater than magnetic permeability, poor impeda...

Claims

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Application Information

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IPC IPC(8): B01J20/16B01J20/26B01J20/28B01J20/30C09K3/00
CPCB01J20/16B01J20/262B01J20/28C09K3/00
Inventor 蒋金龙裘倩倩蒋文彬闵丹丹吴妹茆平
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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