A kind of porous charcoal containing three-dimensional amorphous carbon framework and its preparation method and application

A technology of amorphous carbon and frame, applied in the direction of carbon preparation/purification, etc., can solve problems such as unsatisfactory absorbing effect, and achieve the effect of excellent absorbing performance, moderate conductivity, and effective absorption frequency bandwidth
CN112142032BActive Publication Date: 2022-07-12CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
Publication Date
2022-07-12

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Abstract

The invention provides a three-dimensional amorphous carbon frame porous charcoal and a preparation method and application thereof. The preparation method includes the following steps: pretreatment: making dry wood into wood blocks, and dissolving some components in the wood blocks through a solvent , enrich the micro-nano pore structure of the wood block to form a porous wood block; stabilize the pore structure: wash the porous wood block with deionized water several times, and then freeze-dry it; form amorphous carbon: pass the freeze-dried porous wood block through Double temperature gradient pyrolysis to obtain three-dimensional amorphous carbon framework-containing porous charcoal with nanoparticle decoration. The preparation method has simple preparation conditions; the prepared three-dimensional amorphous carbon frame porous charcoal has excellent comprehensive wave absorbing effect and can be used as a wave absorbing material, and the invention provides a new way for the value-added and efficient utilization of forest biomass.
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Description

technical field

[0001] The invention belongs to the cross field of wave absorbing material technology and wood technology, and more particularly relates to a three-dimensional amorphous carbon frame porous charcoal and a preparation method thereof, and the application of the three-dimensional amorphous carbon frame porous charcoal as a wave absorbing material. Background technique

[0002] While promoting the rapid development of society, electromagnetic technology inevitably brings serious threats to human physical and mental health, the operation of electronic equipment, and the stealth of weapons and equipment. Therefore, how to efficiently absorb polluting electromagnetic waves has received extensive attention and research in the civil and military fields. In addition to strong absorption capacity, excellent absorbing materials are also very important in light weight and wide effective absorption frequency band, which are also important development trends in the field of...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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