A facile process for preparing superhydrophobic PBZ-PTFE coating with excellent stable properties

We present a facile way to fabricate superhydrophobic PBZ-PTFE coating which can be easily prepared in large scale. The superhydrophobic PBZ-PTFE coating was prepared by spraying the PTFE condensed dispersion solution and the benzoxazine mixture solution on the substrate. The water contact angle on the prepared coating reaches 166.5°, and the sliding angle is only 1°. The PTFE weight fraction is optimized to 60% which provides high surface roughness of 3.54 μm required for superhydrophobicity. Importantly, the superhydrophobic coating exhibits excellent temperature stability and corrosion resistance. In addition, the stability of the superhydrophobic coating was evaluated by adhesive tape peeling experiment, bend test, crosscut test and water impact test. We expect that this fabrication technique will have great prospects for industrial applications.