Effect of acetone as a cosolvent on the properties of waterborne silicone antifouling coating
摘要
Waterborne silicone coatings were prepared in this paper by mechanically blending different mass ratios of emulsions to acetone, using γ-methacryloxypropyltrimethoxysilane and dibutyltin dilaurate as the curing agent and catalyst, respectively. The properties of the coatings were examined by laser confocal microscopy, contact angle and surface energy test, tensile test, crosslinking density test, marine bacterial attachment test, and Navicula Tenera attachment test to explore the impact of acetone as a cosolvent on the properties of waterborne silicone antifouling coatings. The results show that the surface of the coating with acetone added formed a special microstructure, which increased the surface roughness and improved the antifouling performance of the coating. Specifically, the surface roughness of the coating increases and the surface energy decreases from 20.48 to 9.98 mJ/m2 as the acetone content decreases. The bacterial adhesion gradually decreases, and the removal rates of bacteria and Navicula Tenera increase by 52.11 and 46.72%, respectively. In addition, acetone reduces the crosslinking density of the coating, improving its mechanical properties. The addition of small amounts of acetone to silicone emulsions is beneficial for improving the mechanical properties, antifouling, and self-cleaning abilities of waterborne silicone coatings.