Hydrophobicity of organosilicon
The traditional antifouling coating is to use the poison such as copper, tin, mercury and lead released in the coating to kill Marine organisms, which can reduce the pollution of Marine organisms, but the release of harmful substances to the ecological environment and human health has also caused harm. According to the formula deduced by Dupre, the lower the free energy of the solid surface, the smaller the adhesion, and the larger the contact Angle of the liquid on the solid surface. Previous studies have shown that the surface energy of the coating should be less than 1.2×10-4 N/m to effectively prevent the adhesion of Marine organisms.
Silicone compounds have very low surface energy, and the structure is very stable, even in the water for a long time to soak the structure is very little change. Silicone antifouling coatings have a smoother surface than usual coatings, and it is difficult for Marine life to attach to it. Even if it is attached, it is not strong, and it is easy to fall off under the action of water or other external forces. It does not have the problem of the release and loss of toxic substances, and can play a role in long-term antifouling. At the same time, strictly controlling the thickness and elastic modulus of organosilicon coating in application will help to improve its antifouling performance.