International. Scientists from India found a simple method to manufacture superhydrophobic coatings to combat bacterial colonization in aluminum with relevance for marine and medical applications.
Aluminum and its alloys are widely used in almost all industries and for marine and medical applications. However, their surfaces are easily colonized by bacteria that form biofilms and are corroded by chemical reactions.
Scientists report a simple method for fabricating superhydrophobic coatings of polyaniline/chitosan/zinc stearate over aluminum with a micro-nanosurface structure by aniline polymerization and chitosan deposition and zinc stearate coating.
The manufactured coatings have been characterized by ATR-IR, XRD, FE-SEM and EDX. The superhydrophobic surface shows the highest water-repellent property with a contact angle of 150.7 °, which is responsible for the anti-adhesion of bacteria, the anti-aging property and the excellent corrosion resistance of aluminum.
The corrosion behavior of the coating in the 3.5% NaCl solution was investigated by EIS and potentiodynamic polarization. The efficacies of the different coatings against bacteria commonly found in marine (Desulfovibrio desulfuricans) and medical (Staphylococcus aureus and Escherichia coli) applications are demonstrated.
Source: https://link.springer.com/
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