Fabrication of Ketjen black-polybenzoxazine superhydrophobic conductive composite coatings

► We report an effective approach to fabricate superhydrophobic conductive composite coatings by a drop casting method. ► No work has been reported on combining Ketjen black with polybenzoxazine to prepare superhydrophobic conductive coatings. ► The composite coatings possess superhydrophobicity over the whole range of pH values. ► These coatings exhibit excellent thermal and environmental stability. ► Superhydrophobic conductive composite coatings can be obtained on various substrates.