Contact angles of water, formamide, methylene iodine and 1-bromonaphthalene on POM and PTFE

The contact angle values (θ) on the surfaces of polytetrafluoroethylene (PTFE) and polyoxymethylene (POM) were determined using the sessile drop technique. A laboratory-made and calibrated goniometer was employed for this purpose*. The contact angles were measured in a static condition, meaning that the contact line between the solid, vapor, and liquid phases of the droplet remained stationary with respect to the surface of the solid. The probe liquids used in the experiment were deionized water (Wa), formamide (Fo, >99.5%, Biopack), methylene iodine (Mi, >99%, Sigma-Aldrich), and 1-bromonaphthalene (Br, >95%, Merck). Drops of 2 µL were deposited onto the surface using a micropipette. The contact angle was measured between 5 and 10 seconds after the drop was deposited on the surface. For each probe liquid, 12 drops were deposited and measured on each surface. *https://doi.org/10.1016/j.ijadhadh.2018.10.012本数据集采用静滴法（sessile drop technique）测定了聚四氟乙烯（polytetrafluoroethylene, PTFE）与聚甲醛（polyoxymethylene, POM）表面的接触角值（θ）。实验采用实验室自制且经校准的接触角测角仪（goniometer）完成相关测试*。本次接触角测量为静态测试，即液滴的固-气-液三相接触线相对于固体表面保持静止。实验所用探针液体包括去离子水（Wa）、甲酰胺（Fo，纯度＞99.5%，Biopack）、二碘甲烷（Mi，纯度＞99%，Sigma-Aldrich）以及1-溴萘（Br，纯度＞95%，Merck）。使用微量移液器将体积为2 μL的液滴滴加至样品表面。在液滴滴加至表面后的5至10秒内完成接触角测量。针对每种探针液体，在每个样品表面均滴加并测量12个液滴。 *https://doi.org/10.1016/j.ijadhadh.2018.10.012