CQDs-MoS2 QDs loaded on Dendritic fibrous Nanosilica/Hydrophobic waterborne polyurethane acrylate for antibacterial coatings

Since bacterial infections are the cause of many diseases, death, and disability, considerable attention has been paid to the preparation of antibacterial surfaces. Anti-adhesive and bactericidal synergistic surfaces show promising antimicrobial applications due to the removal and killing effect of microorganisms. Herein, we proposed a leather coating surface with hydrophobic and photocatalytic antibacterial properties. Dendritic fibrous nanosilica (DFNS) loaded with carbon quantum dots (CQDs) and MoS2 QDs (DFNS@CQDs-MoS2) nanoparticles were successfully prepared, which exhibited excellent photocatalytic antibacterial activity. Specifically, the DFNS@CQDs-MoS2 nanoparticles exhibited antibacterial activities of 99.98%, 95.35%, and 99.99% against Escherichia coli, Staphylococcus aureus, and Aspergillus niger, respectively. Then, hydrophobic waterborne polyurethane acrylate (HWPUA) was developed, which exhibited enhanced bacterial adhesion resistance. Furthermore, the HWPUA/DFNS@CQDs-MoS2 coating completely inactivated the residual bacterial cells. Therefore, the synergistic antibacterial coatings developed in this work could have potential applications as antibacterial surfaces.

Automated summary

This study developed a leather coating surface with both hydrophobic and photocatalytic antibacterial properties, achieving antibacterial activities ranging from 99.98% to 99.99%. By utilizing dendritic fibrous nanosilica loaded with carbon quantum dots and MoS2 quantum dots, in combination with hydrophobic waterborne polyurethane acrylate, excellent antibacterial effects were achieved.