Wave-absorbing material with oriented layered structure and preparation method of wave-absorbing material

A carbon-loaded MOF derivative aerogel with an oriented layered structure is prepared through a three-step process, addressing the limitations of existing materials by enhancing electromagnetic wave absorption and structural stability, suitable for stealth and aerospace applications.

CN119209028APending Publication Date: 2024-12-27XIAN AERONAUTICAL UNIV
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Patent Information

Application Number
CN202411382040.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-30
Publication Date
2024-12-27

AI Technical Summary

Technical Problem

Existing microwave absorbing materials face challenges in achieving thinness, lightness, broadband absorption, and strong environmental stability, particularly due to the lack of magnetic loss and difficulty in forming a directional layered structure that enhances interaction with electromagnetic waves.

Method used

A three-step process involving directional freeze-drying, vacuum impregnation, and vacuum carbonization is used to prepare a carbon-loaded MOF derivative aerogel with an oriented layered structure, ensuring uniform MOF attachment and controlled carbonization to enhance electromagnetic wave absorption.

Benefits of technology

The prepared material exhibits excellent broadband absorbing performance, improving stealth capabilities and survivability in modern communications and aerospace applications while maintaining structural integrity and environmental stability.

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Abstract

The invention provides a wave-absorbing material with an oriented layered structure and a preparation method thereof.The carbon-loaded MOF derivative aerogel wave-absorbing material with the oriented layered structure is prepared through a method of oriented freeze drying, vacuum impregnation and vacuum carbonization, cellulose aerogel with the oriented layered structure is prepared through oriented freeze drying, and then the cellulose aerogel with the oriented layered structure is prepared through vacuum impregnation; the preparation method comprises the following steps: preparing a cellulose aerogel, dipping the cellulose aerogel in an MOF suspension under vacuum, finally performing vacuum carbonization, maintaining the stability of the oriented layered structure of the aerogel through a low-temperature pre-carbonization process, partially converting amorphous carbon into graphite carbon through high-temperature final carbonization, and regulating and controlling the wave-absorbing performance of the carbon-loaded MOF derivative aerogel with the oriented layered structure. The preparation method has the characteristics of simplicity, low cost, environmental protection, high performance and the like, and the prepared aerogel wave-absorbing material with the oriented layered structure has broadband wave-absorbing performance and can be widely applied to the high and new technical fields of communication, aerospace and the like.
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Citation Information

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