Bead string type one-dimensional heterogeneous nano composite material, preparation method and application thereof and polymer-based wave-absorbing composite material

Abstract

The invention provides a bead string type one-dimensional heterogeneous nano composite material, a preparation method and application thereof and a polymer-based wave-absorbing composite material, and belongs to the technical field of wave-absorbing materials. According to the invention, MOFs are strung in a one-dimensional inorganic insulating nano material through in-situ synthesis, and the Co-C@one-dimensional inorganic heterogeneous nano composite material is constructed after high-temperature calcination. The wave-absorbing performance of the Co-C@one-dimensional inorganic heterogeneous nano composite material can be regulated and controlled within a certain range by adjusting the loading capacity of Co-C. On the basis, a polymer is filled with the one-dimensional heterogeneous nano composite material to prepare the polymer-based wave-absorbing composite material, and the rigid Co-C@one-dimensional inorganic heterogeneous nano composite material with the large length-diameter ratio is easily dispersed and lapped in a polymer matrix to form a three-dimensional network structure, so that the wave-absorbing performance and the comprehensive performance of the composite material are improved.

Description

technical field [0001] The invention relates to the technical field of wave-absorbing materials, in particular to a beaded one-dimensional heterogeneous nanocomposite material, a preparation method and application thereof, and a polymer-based wave-absorbing composite material. Background technique [0002] With the rapid development of electronic technology, electronic equipment in daily life affects people's life all the time. Electromagnetic pollution not only causes damage to electronic communication equipment, but also has great harm to human health. In order to overcome the pollution problem caused by electromagnetic radiation, electromagnetic wave absorbing materials came into being. Electromagnetic wave absorbing materials have high absorption capacity and wide absorption bandwidth, which is beneficial to weaken the harm of electromagnetic waves to electronic communication equipment and human health. On the other hand, electromagnetic absorbing materials are also wid...

AI Technical Summary

Problems solved by technology

However, the resistivity difference between MOFs-derived carbon-based materials and air is large, resulting in impedance mismatch, and the MOFs-derived carbon-based materials contain metal particles, which affects their chemical stability and limits the use of MOFs-derived carbon-based materials in Applications in the field of electromagnetic wave absorption

In addition, the porous carbon material formed after MOFs calcination is a similar spherical powder material, which is not easy to disperse in a matrix such as a polymer. If the filling amount is too small, the conductive carbon particles in the porous carbon material cannot be in close contact in large quantities, and cannot form large However, a wide range of conductive pathways cannot build a conductive network, so a large amount of filling (>60wt%) is required to form a conductive network inside the polymer matrix, which not only increases the cost of the material, but also reduces the original polymer matrix material. Mechanical properties and processing flow properties

Images