Rapid curing and self-stratifying lacquer coating with antifouling and anticorrosive properties

Abstract Natural lacquers have long been used as environment-friendly and renewable coatings. Generally, they dry slowly and do not have fouling resistance limiting their applications. Herein, we report a rapid curing, self-stratifying amphiphilic hybrid lacquer coating with excellent antifouling and anticorrosive properties. The coating was prepared by using a natural lacquer coupled with hyperbranched polysiloxane terminated by multi-amine (HPSi) and silane-terminated amphiphilic telomer (S-FP) through a facile sol–gel process. The introduction of HPSi greatly shortened the drying time and improved the mechanical properties of the natural lacquer coating. As HPSi content increased, the drying speed and surface hardness of the coating increased. Particularly, the incorporation of a non-leaching, self-enriched amphiphilic telomer into the hybrid lacquer conferred it an excellent antifouling performance but preserved its anticorrosive and mechanical properties. The flexibility and bacteria-resistant ability of the coating were significantly improved with S-FP content. The study provides a new strategy for modification of natural lacquer, and the hybrid lacquers are expected to be used in development of coatings with both antifouling and anticorrosive performance.