Adsorption of antifouling booster biocides on metal oxide nanoparticles: Effect of different metal oxides and solvents

摘要

One of the most important factors for the efficiency of antifouling paints containing biocides is the optimal release rate of the active substance. If too high, the coating will be depleted prematurely (and there will be an unnecessarily high concentration of active substance in the sea). If the release rate is too low, fouling will result. In order to obtain the optimal release rate, the interaction between a carrier and the biocide must be sufficiendy strong to minimise diffusion through the dry film. The carrier must also not detrimentally affect the coating's performance. One way to achieve this is to use low concentrations of nanoparticles (ie with a high surface area), which can adsorb the biocide, preventing early depletion and retain the biocide close to the coating once in the water.