Antibacterial Effect of AgO/PS Microcapsule Modified Epoxy-based Coating on Aviation Fuel Contaminated by Microorganisms

The antibacterial effect of epoxy-based coating with AgO/PS microcapsules on bacillus subtilis, pseudomonas aeruginosa and aviation fuel contaminated by microorganisms had been systematically studied, as well as the microstructure of the modified coating. The results showed that with the increase of AgO/PS microcapsules in the coating, the antibacterial performance of the modified coating gradually increased. When the amount of microcapsules was slightly higher than 1.19% (mass fraction), the sterilization rate of the modified coating to bacillus subtilis and pseudomonas aeruginosa both reached more than 99%. With the addition of 1.19% (mass fraction) AgO/PS microcapsules, the sterilization rate after 120 h contact with microbial-contaminated aviation fuel was 99.8%. AgO/PS microcapsules were uniformly distributed in the coating matrix, and the nano-scale silver ions in the microcapsules reacted with the serogroups in the bacteria, causing the bacteria to lose their ability to divide and proliferate and die. Then the silver ions were released and sterilized repeatedly. AgO/PS microcapsules had a long-lasting antibacterial effect.