The present invention relates to an oil-in-water nanoemulsion comprising an oil phase comprising at least one essential oil or water-immiscible phase comprising a hydrophobic polymer and/or a hydrophobic active dispersed in an aqueous phase, said nanoemulsion comprising nanometric droplets of said essential oil or said active with an interface consisting of amphiphilic derivatives of chitosan and at least one fatty acid, obtained by ionic interaction between the deacetylated amino groups of said chitosan and the carboxylic groups of said fatty acid.
