A three-dimensional graphene sponge/Fe2O3 composite wave absorbing material and a preparation method thereof

A composite wave absorbing material and graphene sponge technology, applied in the field of wave absorbing materials, can solve the problems of time-consuming, high temperature of magnetic nanoparticles, complicated operation, etc., and achieve the effects of simple operation conditions, low density, and large specific surface area.
CN108774491AActive Publication Date: 2018-11-09DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Publication Date
2018-11-09

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Abstract

A three-dimensional graphene sponge / Fe2O3 composite wave absorbing material and a preparation method thereof are disclosed and belong to the technical field of wave absorbing materials. Firstly, three-dimensional graphene is prepared through a template process and is then added into deionized water, the mixture is subjected to ultrasonic treatment to obtain a uniformly dispersed three-dimensionalgraphene sponge suspension, then an aqueous Fe<3+> solution is added into the suspension dropwise, and a reaction occurs at 70-95 DEG C after the pH value is adjusted with ammonia water. The structureand wave absorbing performance of the composite wave absorbing material are adjusted through controlling the using amount of FeCl3, the pH value, the reaction temperature and the reaction time. A graphene matrix of the composite wave absorbing material in which the graphene sponge is loaded with magnetic nanometer Fe2O3 particles has a mesoporous sponge structure, and the Fe2O3 particles are uniformly anchored and grow on the graphene sponge. The prepared composite wave absorbing material has characteristics of high wave absorbing intensity, effective absorption frequency bandwidth, low density, low thickness, and the like, and has important application value in the field of developing efficient and light-weight electromagnetic wave absorbing materials.
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Description

technical field

[0001] The invention belongs to the technical field of wave-absorbing materials, and relates to a three-dimensional graphene sponge / Fe 2 o 3 Composite wave-absorbing material and its preparation method. Background technique

[0002] In recent years, with the rapid development of electronic equipment and communication facilities, serious electromagnetic radiation has become an important source of pollution, and electromagnetic pollution has become a problem that cannot be ignored. Electromagnetic radiation not only affects the normal operation of highly sensitive and sophisticated electronic equipment, but also has a significant negative effect on human health. Therefore, it is of great significance to develop ideal absorbing materials with characteristics such as strong absorption, wide frequency band, low density, and thin thickness. .

[0003] Graphene is an ultra-thin two-dimensional carbon nanomaterial with a series of advantages such as small density,...

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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