Abstract
Nature has been an inspiration source to develop artificial hydrophobic surfaces. During the latest years the development of hydrophobic surfaces has been widely researched due to their numerous ranges of industrial applications. Industrially the use of hydrophobic surfaces is being highly demanded. This is why many companies develop hydrophobic products to repel water, in order to be used as coatings. Moreover, these coating should have the appropriated mechanical properties and wear resistance. In this work wear study of a hydrophobic coating on glass is carried out. Hydrophobic product used was Sika Crystal Dry by Sika S.A.U. (Alcobendas, Spain). This product is currently used on car windshield. To calculate wear resistance, pin-on-disk tests were carried out in dry and water conditions. The test parameters were rate, load and sliding distance, which were fixed to 60 rpm, 5 N and 1000 m respectively. A chamois was used as pin. It allows to simulate a real use. The friction coefficient and loss weight were compared to determinate coating resistance
Highlights
For buildings with large glass areas, accumulation photovoltaic modules or windshields it is very interesting to get “Easy to Clean” effect on the surfaces
An additional problem is the possible photocatalysis, wherein organic contaminants adsorbed on film surface are decomposed under ultraviolet light [3]
Tests with hydrophobic surfaces revealed a reduction in friction, which may be attributed to lubricant slip against the hydrophobic surface
Summary
For buildings with large glass areas, accumulation photovoltaic modules or windshields it is very interesting to get “Easy to Clean” effect on the surfaces. The effects of surface properties, such as wetting, surface energy, oleo/hydrophobicity, and oleo/ hydrophilicity, were investigated in only a small number of tribological studies using macro contacts with engineering materials and lubricants [6,7,8,9]. Characterization of surface energy, aesthetical aspect, abrasion test and adherence measurements were performed before and after ultraviolet (UV) light irradiation (15 W mercury lamp–Techlux emitting 254 nm wavelength).The samples were exposed to light irradiation, 5 cm far from the light source.
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