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Contact angles using water were measured on five coatings used on aircraft. These coatings are very uniform spatially but do exhibit hydration, meaning their contact angle changes as a function of exposure to the vapor of the test fluid (i.e., water). Therefore each contact angle was measured as a function of time, with t = 0 corresponding to the first contact of the water with the dry surface. Two contact angles can be identified: an initial angle and a steady-state angle. These surfaces equilibrated in about 15 seconds, as can be seen from the representative graphs of contact angle versus time presented below.
n型Sb合金SnSe热电多晶中纳米结构和导热系数降低的证据
用于太阳能集热器的具有增强热性能和机械性能的石墨烯结合铝
塑料共混物对油棕空果串慢速热解的影响
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