Dual antibiofouling coatings based on slippery surfaces and cuprous oxide—tannic acid submicroparticles

Marine biofouling poses a significant challenge to the marine industry. There is an urgent requirement for the development of robust and durable coatings with enhanced antibiofouling capability. This study introduces a dual antibiofouling slippery surface (DASS) composed of polyorganosilazane, silicone oils, and cuprous oxide-tannic acid submicroparticles. The integration of the slippery surface with chemical antifoulants results in exceptional slippery characteristics and improved antibiofouling performance. A series of tests, including air-blowing, shear-spinning, and long-term storage, indicate that DASSs possess good stability and durability. Furthermore, DASSs show the sustainable release of copper in artificial seawater. The dual antibiofouling effect enable the DASSs to exhibit outstanding antibiofouling performance against the typical algae, diatom, and bacterial. The synergism of slippery surfaces and chemical antifoulants paves a promising way to robust and high-performance antibiofouling coatings.