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Preparation method of three-dimensional ordered carbon-based porous wave-absorbing material based on native wood

A three-dimensional ordered, wave-absorbing material technology, applied in the preparation/purification of carbon, chemical instruments and methods, other chemical processes, etc., can solve the problems of single-oriented absorption, limited preparation methods and raw materials, etc., to improve impedance matching, The effect of increasing the magnetic loss

Pending Publication Date: 2020-01-31
HARBIN INST OF TECH AT WEIHAI +1
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Problems solved by technology

However, there are still few studies on the application of three-dimensional ordered carbon-based porous materials in the field of microwave absorbing materials, and the preparation methods and raw materials involved are also limited.
At the same time, ordered porous biomass pyrolytic carbon has the biggest disadvantage of single-orientation absorption when it is used as a wave-absorbing material.

Method used

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  • Preparation method of three-dimensional ordered carbon-based porous wave-absorbing material based on native wood
  • Preparation method of three-dimensional ordered carbon-based porous wave-absorbing material based on native wood
  • Preparation method of three-dimensional ordered carbon-based porous wave-absorbing material based on native wood

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Embodiment Construction

[0015] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0016] The preparation method of the three-dimensional ordered carbon-based porous wave-absorbing material based on native wood involved in the present invention comprises the following steps:

[0017] Step 1. Pretreatment of raw wood: first cut the raw wood (pine wood as an example) into a predetermined size of cuboid (or other required shape), then soak the wood block for 1 to 2 days, and then wash it repeatedly with deionized water Wood blocks several times, and finally dry the wood blocks at 50-70°C.

[0018] Soaking the wood block for 1 to 2 days in step 1 can facilitate the subsequent washing steps, and repeatedly washing the wood block with deionized water can remove impurities on the surface that are easy to remove. In this embodiment, an oven is used for drying.

[0019] Step 2, pre-carbonization: put the dried wood blocks in step...

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Abstract

The invention provides a preparation method of a three-dimensional ordered carbon-based porous wave-absorbing material based on native wood. The preparation method comprises the following steps: S1, cutting the native wood into cuboids with preset sizes, soaking the formed wood blocks for 1-2 days, repeatedly washing the wood blocks with deionized water multiple times, and finally drying the woodblocks at 50-70 DEG C; S2, putting the wood blocks dried in the step S1 into a tubular furnace, carrying out heating to 350-450 DEG C, and keeping the wood blocks at the temperature for 0.5-1 hour toobtain pre-carbonized charcoal blocks; S3, mixing the pre-carbonized charcoal blocks with Fe (NO3) 3 having a concentration of 0.05 to 0.2 mol / L, and carrying out drying at a temperature of 50 and 70DEG C; and S4, putting a product obtained after drying in the S3 into the tubular furnace, carrying out heating to a preset temperature, keeping the product at the temperature for 0.5-1 hour, and taking out a sintered product when the temperature decreases to room temperature, thereby obtaining the three-dimensional ordered carbon-based porous wave-absorbing material. The three-dimensional orderedcarbon-based porous wave-absorbing material obtained by using the method can be used as an excellent wave-absorbing material with light weight, small thickness, wide absorption frequency band and strong absorption characteristics.

Description

technical field [0001] The invention relates to the technical field of structural material preparation, in particular to a method for preparing a three-dimensional ordered carbon-based porous wave-absorbing material based on raw wood. Background technique [0002] The demand for electromagnetic wave absorbing materials and radar absorbing materials is in military applications (reducing the detection probability of aircraft, ships, tanks and other targets) and civilian applications (reducing electromagnetic interference between components and circuits, reducing back radiation of microstrip radiators) The fields are very broad. Regardless of the application conditions of the absorbing material, weight reduction and optimization of the effective absorption band width are two important issues. [0003] As we all know, carbon materials have been the most commonly used electrode materials because of their advantages such as low cost, chemical stability, open pores, and environmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C09K3/00
CPCC01B32/05C09K3/00
Inventor 钟博王猛王华涛张涛姜大海费连东
Owner HARBIN INST OF TECH AT WEIHAI
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