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

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.