Nanowire array modified graphene honeycomb reinforced nano aerogel heat-insulating and wave-absorbing composite material

Abstract

The invention discloses a nanowire array modified graphene honeycomb reinforced nano aerogel heat-insulating and wave-absorbing composite material, which is composed of graphene honeycomb, nanowire array and nano aerogel, and is characterized in that a silicon carbide coating is prepared on the surface of the graphene honeycomb through a chemical vapor deposition process for reinforcement, and the silicon carbide coating is in discontinuous distribution; then preparing a nanowire array in pores in the graphene honeycomb through a chemical liquid phase deposition process, and finally preparing nano aerogel on the surface of the nanowire array through a sol-gel process, a supercritical drying technology and a carbonization reaction, the formed three-dimensional network structure can effectively block heat transmission and promote absorption and dissipation of electromagnetic waves, and synergistically provides heat insulation and wave absorption performance of the composite material.

Description

technical field [0001] The patent of the present invention relates to a heat-insulating wave-absorbing composite material, in particular to a nano-wire array modified graphene honeycomb reinforced nano-aerogel heat-insulating wave-absorbing composite material, which can be used for long-term service in a high temperature and complex environment. [0002] technical background [0003] Electromagnetic waves are the carrier on which modern information transmission and reception depend. In civil use, with the development of electronic information technology, wireless electronic communication technology and related products based on the emission, transmission and processing of electromagnetic waves have developed rapidly and have been widely used. However, the resulting electromagnetic radiation and interference have also become increasingly serious, becoming a new source of pollution that affects physical health and quality of life; in the military aspect, the development of wirel...

AI Technical Summary

Problems solved by technology

However, this invention is a one-dimensional nano-wave absorbing material, which does not have the structural advantages of a three-dimensional space network

[0009] As shown in the above-mentioned patents, in order to realize the preparation of high-temperature-resistant heat-insulating and wave-absorbing materials, silicon carbide materials are generally used as the main material for design, but it is difficult to effectively balance heat-insulating and wave-absorbing performances during the preparation process, and at the same time, the space structure The design is relatively simple and cannot achieve the expected goal