Effective improvement in microwave absorption by uniform dispersion of nanodiamond in polyaniline through in-situ polymerization

Abstract

Uniformly dispersed nanodiamond/polyaniline composite was synthesized by an in situ polymerization, in which the nanodiamond was non-gap combined with polyaniline. The hybrids displayed significant improvement in microwave absorption, which were due to additional and strong polarization originated from the HN-CO groups acting as asymmetric center. Besides, the individually dispersed nanodiamond and the special interface between polyaniline and nanodiamond brought out enhanced interfacial polarization loss. These results could help in understanding the nature of polarization loss, and might open path towards the design of microwave absorbing materials.

Fabrication of Transparent Nanohybrids with Heat Resistance Using High-Density Amorphous Formation and Uniform Dispersion of Nanodiamond

“…56,57 Figure 2, panel a shows an AFM image of the surface of the press-molded film of P(VDF-TeFE)/organomodified ND hybrids that were made by melt-compounding. The sample was cooled to 110°C after being melted at 150°C, and the free surface was observed.…”

Intercalating Hybrids of Sandwich-like Fe3O4–Graphite: Synthesis and Their Synergistic Enhancement of Microwave Absorption

“…Recently, ultralight graphene-based materials with excellent microwave absorption (MA) are becoming more and more attractive to address the increasing electromagnetic interference pollution. − First, graphene and its derivatives promise to be superior building blocks for constructing MA materials, owing to its remarkable physical properties, including being lightweight and having a large surface area, high conductivity, good thermal conductivity, and easy process ability. , Graphene aerogels have attracted wide attention in applications for their microwave absorption performance, owing to the effective dielectric loss and multiple scattering in the 3D network structure. , Taking advantage of graphene and introducing other loss materials is not only beneficial for increasing the interface polarization and electromagnetic loss ability but also for impedance matching behavior. − Among them, through the introduction of Fe 3 O 4 with low toxicity, high compatibility, and strong spin polarization at room temperature, the magnetic loss and electromagnetic attenuation of graphene can be significantly improved, which is beneficial to enhance the MA. The interface introduced by Fe 3 O 4 generates resonance in complex permittivity and permeability as well as enhances magnetic loss, resulting in the enhanced MA capacity and widened effective absorption bandwidth, , which makes them ideal candidates as MA materials.…”

Facile Fabrication of Rhodium/Nanodiamond Hybrid as Advanced Catalyst toward Hydrogen Production from Ammonia–Borane

“…The in situ formed Rh NPs are well distributed on the nano-DA surface with an average size of 3.0 nm ( Figure 1c). The high-resolution TEM (HRTEM) image revealed the distinct lattice fringes with a d-spacing of 0.206 nm corresponding to the (220) plane of nano-DA ( Figure 1a inset) [31,32]. Moreover, the HRETM image also exhibited the clear lattice fringe with an interplanar spacing of 0.21 nm consistent with the Rh (111) plane (Figure 1b inset) [33].…”