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首页> 外文期刊>Advanced Materials >Response to Comment on 'Vapor Lubrication for Reducing Water and Ice Adhesion on Poly(dimethylsiloxane) Brushes': Organic Vapors Influence Water Contact Angles on Hydrophobic Surfaces
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Response to Comment on 'Vapor Lubrication for Reducing Water and Ice Adhesion on Poly(dimethylsiloxane) Brushes': Organic Vapors Influence Water Contact Angles on Hydrophobic Surfaces

机译：Response to Comment on 'Vapor Lubrication for Reducing Water and Ice Adhesion on Poly(dimethylsiloxane) Brushes': Organic Vapors Influence Water Contact Angles on Hydrophobic Surfaces

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摘要

Fast removal of water drops from solid surfaces is important in manyapplications such as on solar panels in rain, in heat transfer, and for watercollection. Recently, a reduction in lateral adhesion of water drops onpoly(dimethylsiloxane) (PDMS) brush surfaces after exposure to variousorganic vapors was reported. It was attributed to the physisorption of vaporand swelling of the PDMS brushes. However, it was later pointed out that achange in the interfacial energies by vapor adsorption could also have causedlow drop adhesion. To find out how strongly each effect contributes, contactangles of water drops on three hydrophobic surfaces in different vapors aremeasured. In water-soluble vapors, a substantial decrease is observed incontact angles. This decrease can indeed be explained by a vapor-inducedchange in the interfacial tensions. The very low contact angle hysteresis onPDMS surfaces in saturated n-hexane and toluene vapor cannot be explainedby a change in interfacial tensions. The observation supports the hypothesisthat these vapors adsorb into the PDMS and form a lubricating layer. It ishoped that these findings help to solve fundamental problems and contributeto applications, such as anti-icing, heat transfer, and water collection.

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