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

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...

AI Technical Summary

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.

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