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already exist that try to reverse the fi rst market losses in the non-stick coating market, supporting the cause of traditional products. 6.4 Conclusions Thirty-five years after the pioneering work of Schmidt with ORMOCERs, hybrid silica sol–gel coatings easily obtained by depositing a thin layer (few tens of microns) of the liquid coating over substrates of practically any composition and shape are no longer a niche technology pursued by start-up companies, but rather a well-known nanochem- istry technology, used across many industries worldwide to protect and to provide new properties to existing products. Transparent sol–gel silica coatings are truly advanced functional materials whose utilization, however, is still largely beyond their full applicative potential. For exam- ple, following their introduction to the market in 2010, today approximately 1 bil- lion people across the world use a tablet. It would be enough to ask them if they are satisfi ed with the fi ngerprint left on the display after a single utilization cycle, to understand how obsolete are the coatings used (or, perhaps, not used) by the tablet manufacturers. As mentioned above, a long lasting sol–gel coating for tablet and glass displays in general has been launched by late 2014. Similar arguments hold for anti-fog and anti- mist coatings that continue to not be applied by glass makers on the glass they supply to car, truck and train manufacturers. Sol–gel coatings based on now well-mastered nanochemistry of the sol–gel process are the long-awaited, economically viable solution to these and related unmet customer requirements. The silane price has dropped, and sol–gel coatings became economi- cally viable. Customers using silica and organosilica coatings in place of conventional polymeric materials, furthermore, provide their products with a dramatically improved sustainability profi le. This study provides a critical overview of sol–gel silica nanocoat- ings in the context of the coatings industry and market. Acknowledgements We thank our friends and co-workers in the field of sol–gel coatings, David Avnir, Hebrew University of Jerusalem; Eric Le Bourhis, University of Poitiers; Frank V. Bright and Michael R. Detty, University of New York at Buff alo; Pietro Selvaggio and Sebastiano Tusa, Soprintendenza del Mare della Sicilia; and DavideTranchida, now at the University of Siegen. Their cooperation has been as fruitful as personally reward- ing. Prolonged correspondence of one of us (M.P.) with Professor Horst Böttcher, GMBU eV Dresden, has inspired many arguments of the present study.
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158 Biobased and Environmental Benign Coatings References 1. M. Pagliaro, R. Ciriminna, and G. Palmisano, Journal of Materials Chemistry, V ol. 19, pp. 3116–3126, 2009. 2. A. Julio López and J. Rams, Reinforced Sol–Gel Silica Coatings in D. Levy and M. Zayat, eds., The Sol-Gel Handbook , Wiley-VCH, Chapter 42, 2015.
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  • Sol-gel, Formulations, Sol–Gel Coatings

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