Quartz crystal microbalance with dissipation (QCM-D) response data was used to determine the friction coefficient (μ$\mu$) between soft solid surface and ethanol. A self-assembly of Dodecanethiol (DCT) film on gold was carried out. The number of DCT grafted (Γ) onto gold surface was investigated at concentrated solutions (10-33% v/v). Such large concentration leads to an increase on grafting density, viscosity, roughness and water contact angle favoring the reduction of friction coefficient (∼$\sim$ 0.0922). These results allow proposing a soft self-assembled hydrophobic film to reduce friction between fluids into conduit, tube, or some other device.

带有耗散的石英晶体微天平（QCM-D）响应数据用于确定摩擦系数（μ$\mu$）在柔软的固体表面和乙醇之间。在金上进行了十二烷硫醇（DCT）膜的自组装。在浓溶液（10-33％v / v）下研究了接枝到金表面的DCT数（Γ）。如此高的浓度导致接枝密度，粘度，粗糙度和水接触角的增加，有利于降低摩擦系数（〜$〜$0.0922）。这些结果允许提出一种柔软的自组装疏水膜，以减少进入导管，管子或其他设备的流体之间的摩擦。