A novel all-organic microcapsule with excellent long-term antibacterial and anti-corrosion performances

This work successfully synthesized the salicylic [email protected] ( [email protected] ) microcapsules with PUF microcapsules as shell material and SA as core material. The loading content of SA in the PUF microcapsules was approximately 40 %. The [email protected] microcapsules had excellent long-term antibacterial properties because the PUF microcapsules controlled the release of SA antifouling agents with the ability to induce reactive oxygen species generation and inactivate bacteria. The antibacterial efficiency of [email protected] microcapsules after 35 days against Staphylococcus aureus and Pseudomonas aeruginosa remained at 80 % and 81 %, increased by 60 % and 62 % compared with pure SA, respectively. The impedance modulus at 0.01 Hz of the [email protected] coating reached 5.51 GΩ cm 2 , much higher than blank coating (2.55 GΩ cm 2 ) and PUF coating (4.94 GΩ cm 2 ), indicating that the anti-corrosion property of the [email protected] coating was much better. This work would contribute to developing novel coatings with long-term antibacterial activity and excellent anti-corrosion performance.