Wu-Bavouzet Fanny, Cayer-Barrioz Juliette, Le Bot Alain, Brochard-Wyart Françoise, Buguin Axel
Laboratoire Physico-Chimie Curie, CNRS UMR 168, Institut Curie Section Recherche, Paris, France.
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Sep;82(3 Pt 1):031806. doi: 10.1103/PhysRevE.82.031806. Epub 2010 Sep 29.
We present experimental results for the friction of a flat surface against a hexagonally patterned surface, both being made of PolyDiMethylSiloxane. We simultaneously measure forces of range 10 mN and observe the contact under sliding velocities of about 100 μm/s. We observe adhesive friction on three different pattern heights (80, 310, and 2100 nm). Two kinds of contacts have been observed: the flat surface is in close contact with the patterned one (called intimate contact, observed for 80 nm) or only suspended on the tops on the asperities (called laid contact, observed for 2100 nm). In the range of velocities used, the contact during friction is similar to the static one. Furthermore, our experimental system presents a contact transition during friction for h=310 nm.
我们展示了由聚二甲基硅氧烷制成的平面与六边形图案表面之间摩擦的实验结果。我们同时测量了范围为10 mN的力，并观察了约100μm/s滑动速度下的接触情况。我们观察了三种不同图案高度（80、310和2100 nm）下的粘着摩擦。观察到了两种接触情况：平面与图案表面紧密接触（称为紧密接触，80 nm时观察到）或仅悬浮在粗糙顶部（称为搭接接触，2100 nm时观察到）。在所使用的速度范围内，摩擦过程中的接触类似于静态接触。此外，我们的实验系统在h = 310 nm的摩擦过程中呈现出接触转变。
