Sol-Gel Coatings: Durable, Versatile Surface Treatments for Modern Applications
Sol-gel coatings are thin films or layers which are applied as a liquid and later solidify into a solid gel on a substrate surface through solvent-based reactions. The sol-gel process involves transitioning solutions of molecular precursors ("sol" into networks of both inorganic and organic polymers ("gel" on the substrate surface. The synthesis of sol-gel coatings involves hydrolysis and polycondensation reactions of molecular precursors such as metal alkoxides or metal salts.