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Carbonaceous nanomaterials such as carbon nanotubes(CNTs),magnetic metal nanomateriais and semiconductor nanomaterials are superior candidates for microwave absorbers.Taking full advantage of the features of CNTs,nanophase cobalt and nanophase zinc oxide,whose main microwave absorption mechanisms are based on resistance loss,magnetic loss and dielectric loss,we fabricate CNT/Co and CNT/ZnO heterostructure nanocomposites,respectively.By using the CNTs,CNT/Co nanocomposites and CNT/ZnO nanocomposites as nanofillers,composites with polyester as matrix are prepared by in situ polymerization,and their microwave absorption performance is studied.It is indicated that the synergetic effects of the physic properties of different components in nano-heterostructures result in greatly enhanced microwave absorption performance in a wide frequency range.The absorption peak is increased,the absorption bandwidth is broadened,and the maximum peak shifts to a lower frequency.
Carbonaceous nanomaterials such as carbon nanotubes (CNTs), magnetic metal nanomaterialis and semiconductor nanomaterials are superior candidates for microwave absorbers. Taking full advantage of the features of CNTs, nanophase cobalt and nanophase zinc oxide, whose main microwave absorption mechanisms are based on resistance loss, magnetic loss and dielectric loss, we fabricate CNT / Co and CNT / ZnO heterostructure nanocomposites, respectively. By using CNTs, CNT / Co nanocomposites and CNT / ZnO nanocomposites as nanofillers, composites with polyester as matrix are prepared by in situ polymerization, and It is indicated that the synergetic effects of the physic properties of different components in nano-heterostructures result in greatly enhanced microwave absorption performance in a wide frequency range. The absorption peak is increased, the absorption bandwidth is broadened, and the maximum peak shifts to a lower frequency.