Abstract
The wide application of superhydrophobic materials is mainly hindered by the poor mechanical robustness and complicated preparation method. To overcome these problems, we tried to make a combination of hierarchical and self-similar structure by the means of a simple spraying method. By adding nanofiller (carbon nanotube) and microfiller (graphite powder and expanded graphite), the hierarchical structure was constructed. By further doping the fillers in the commercial asphalt uniformly, the self-similar structure was prepared. Based on the aforementioned work, the as-prepared sample could withstand the sandpaper abrasion for 12.00 m under 4.90 kPa. Moreover, this superhydrophobic coating demonstrated good conductivity, superior self-cleaning property, and excellent corrosion resistance. The integration of conductivity with the superhydrophobicity might open new avenues for ground grid applications.
Highlights
The steel is widely used in our daily life and industry due to its relatively low price, excellent mechanical strength, and superior machinability [1,2,3]
The surface microstructures of the superhydrophobic coating were investigated by a scanning electron microscope (SEM, TESCAN Vega3), and the element compositions were assessed from the equipped energy-dispersive spectroscopy (EDS)
The hierarchical structure was prepared by means of adding both microscale filler and nanoscale filler
Summary
The steel is widely used in our daily life and industry due to its relatively low price, excellent mechanical strength, and superior machinability [1,2,3]. Superhydrophobic materials, which can be fabricated by the combination of micro/nanostructure and low surface energy, are attracting more and more attention because the water droplets can maintain nearly spherical shape on them and roll off [8,9,10,11] Based on this extreme repellency, many researches have tried to use the superhydrophobic materials to protect corrosion [12,13,14]. The hierarchical and self-similar structures were combined which endowed the superhydrophobic coating with outstanding conductivity, excellent mechanical robustness, and superior self-cleaning performance. This superhydrophobic coating was achieved by spraying, which has the potential for large-scale production
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