The non-toxic antifouling compound sodium benzoate (NaB)was encapsulated in polystyrene (PS)microcapsules via an in-liquid drying process

and so dium benzo ate could leach slowly from the antifouling coating matrix. The effect of solvent

temperature and dispersant was analyzed

and the polymer particle size decreases while the reaction temperature deceases

or amount of dispersing agent and stirring speed increases. The release rate of sodium benzoate was determined by standard curve method

compared with the matched group to go ahead study slow release of Sodium benzoate. Antibacterial test also shows that

even in de-ionized water for 120 days

the samples of anti-fouling coatings have obvious inhibitory effect.