Antireflection (AR) titania coatings having self-cleaning capabilities suitable for photovoltaic (PV) glass surface applications were developed by two different post-synthesis treatments which determine the reduction of surface energy, the key factor for obtaining hydrophobic surfaces. Two methodologies were used: a stearic acid treatment [1] and a silanization process with methyltrichlorosilane performed in different solvent [2]. Both treatments favor the air trapping below the rainwater, characteristic of a hydrophobic surface. By comparing the methods, it was observed that the stearic acid treatment produces an average contact angle (60°) similar to that obtained with the silanization (75-78°) well-known for its good results, encouraging so the use of the bio-compatible chemical.
Hydrophobic behavior of self-cleaning and AR sol-gel titania coatings for PV glass surface
SALVAGGIO, maria grazia;PASSALACQUA, Rosalba;PERATHONER, Siglinda;CENTI, Gabriele;CAPRI', ANGELA;CALABRESE, Luigi
2016-01-01
Abstract
Antireflection (AR) titania coatings having self-cleaning capabilities suitable for photovoltaic (PV) glass surface applications were developed by two different post-synthesis treatments which determine the reduction of surface energy, the key factor for obtaining hydrophobic surfaces. Two methodologies were used: a stearic acid treatment [1] and a silanization process with methyltrichlorosilane performed in different solvent [2]. Both treatments favor the air trapping below the rainwater, characteristic of a hydrophobic surface. By comparing the methods, it was observed that the stearic acid treatment produces an average contact angle (60°) similar to that obtained with the silanization (75-78°) well-known for its good results, encouraging so the use of the bio-compatible chemical.Pubblicazioni consigliate
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