Antibacterial and corrosion protection properties of SA-CuZnO@ODA-GO composite in circulating cooling water.

The suitable temperature of circulating cooling water is conducive to the reproduction of bacteria, which will cause corrosion to the pipe and form slime on its surface. Therefore, the sterilization of circulating cooling water is an essential step. In this work, a new type of SA-CuZnO@ODA-GO composite antibacterial material with hydrophobic properties was prepared by ultrasonic treatment method. The composite was characterized and analyzed by SEM, TEM, XPS, XRD, and FT-IR. Then, the CuZnO@ODA-GO@PU hydrophobic and antibacterial coating was prepared. The antibacterial properties and mechanism of the composite were investigated by gram-positive bacteria S. aureus and gram-negative bacteria E. coli. The result shows that the best antibacterial rate of SA-CuZnO@ODA-GO composite antibacterial material is up to 99.10%. As for the SA-CuZnO@ODA-GO@PU composite antibacterial coating, the corrosion resistance of the antibacterial coating is up to 99.99%. The anticorrosion property is due to the hydrophobic modification of the composite, which can insulate the steel sheet from water. Secondly, due to the rigidity of the SA-CuZnO@ODA-GO, it combines with epoxy resin to form a compact structure.