Constructed Nano-Microcapsule Coating Coated with AgNPs for Enhanced Antibacterial Activity Effectively

Abstract

With the continuous improvement of people’s requirements for the living environment, healthy and green living materials have been favored by the market. The development of nanotechnology provides a new direction for the research and development of healthy human settlement materials. Nano-microcapsules are used as carriers to prepare new building coating materials with efficient antibacterial agents, which can achieve slow release and efficient antibacterial properties. It has important application value for improving bacterial pollution on indoor walls and providing a clean-living environment. Silver nanoparticles coated with nano-microcapsules (AgNPs@PS-NMP) were prepared by one-step method for killing Staphylococcus aureus (S. aureus). SEM results showed that the particle size was about 500–600 nm, the particle size was uniform, the degree of agglomeration was small, and the morphology was complete. The Zeta potential was approximately −18.8 mV. The coating construction performance, hydrophilicity, drying time of AgNPs@PS-NMP were investigated respectively. The antibacterial activity of AgNPs@PS-NMP was further studied. The results showed that the nano-microcapsules had a good killing effect on S. aureus, and the minimum bactericidal concentration (MBC) was 28 μg/mL. These results suggest that AgNPs@PS-NMP, as a new type of coating, not only has good coating properties but also excellent antibacterial properties. It can be used as a potential antibacterial building material for hospitals, schools and other places.