Non-elastic Glassy Coating with Fouling Release and Resistance Performances
Fouling release coatings receive growing attention because they are eco-friendly, where their elasticity plays a critical role in detaching biofouling. In this study, a non-elastic organic-inorganic hybrid coating is prepared by facile sol-gel process from mixing silane-terminated telomer of dodecafluoroheptyl methacrylate (DFMA) and poly(ethylene glycol) methyl ether methacrylate (PEGMA), triethoxyoctylsilane (KH832) as well as tetraethyl orthosilicate (TEOS). Such a coating with tethered amphiphilic telomer is transparent and glassy. It also exhibits excellent adhesion to substrate and high hardness, which can effectively prevent mechanical damage and also inhibit the rooting of fouling organisms. Particularly, the coating has remarkable fouling release performance even though it has high modulus. This study clarifies that the low surface energy (~20 mJ·m-2) and low surface roughness (< 3 nm) are responsible for the fouling release ability of the non-elastic coating. Moreover, the coating surface covered with non-leaching amphiphilic side chains can effectively inhibit the adhesion of marine bacteria, biofilm and diatom. The hybrid coating with robustness, fouling release and fouling resistance performances is promising in anti-biofouling.