This chapter summarizes key issues in the fields of multifunctional superhydrophobic coatings with an analysis of their tribological properties. In this respect, the authors explore a simple sol-gel process strategy and tribological properties controlled through a reaction of ORMOSIL-based polymers that generate multifunctional minimum free energy structures of micro- to nano-scale siloxane chains. Different compositions and dimensions of solid materials (contact angle = 150° and sliding angle = 10°) can be superhydrophobic fabricated through various deposition methods. The complete waterproof layering has been demonstrated to have excellent cost, scalability, and especially the ability to encapsulate other functional groups. The perspectives have established many significant functionalities with better tribological properties for the next generation of smart multifunctional superhydrophobic coatings.

Applications. -A MeOH/H 2O solution containing MeSi(O-Et)3, HO2C-CO2H, and NH 3 is hydrolysized for 15 h at 20 C before being sprayed on Ge, brass, steel, Cu, and glass substrates (2 min, 125 C, 40% rel. humidity) and subsequently dried (150 C, 2 h). Corrosive chloride solutions and HNO3 (69-70%) are used to test the anticorrosive performance of the resulting silica-based coating at room temperature. The as-prepared superhydrophobic coating shows outstanding long-term durability, mechanical stability, self-cleaning ability, thermal stability, and acid resistance. SEM images of surfaces are provided together with wettability data comprising measurements of surface roughness, water contact and sliding angle, and air fraction before and after coating application. -(MAHADIK*, S. A.; PEDRAZA, F.; VHATKAR, R. S.; J. Alloys Compd. 663 (2016) 487-493, http://dx.