Effect of Undulations on Surface Energy: A Quantitative Assessment

摘要: Contact angle measurements have been widely used to estimate the surface energy of various materials. Such are severely limited with substrate surfaces that exhibit restructuring, contaminated, and/or porous. Although captive bubble/drop method addresses capillarity problem, undulations not previously accounted for in a quantitative way. We do so here series 8 different pore size synthetic polymer membranes, all fabricated from poly(ether sulfone), as model rough porous same chemistry. Also, 3 membranes were rendered hydrophilic through photoinduced graft polymerization producing 17 modified similarly tested. By incorporation roughness parameters obtained AFM measurements, corrections constant successfully made using simple surface. The predicted average value sessile drop contact...