Chromafil xtra syringe filters

TMSC (Avicel, M_w = 185,000 g/mol, M_n = 30,400 g/mol, polydispersity index = 6.1 determined by size exclusion chromatography in chloroform) with a DS_TMS value of 2.8 was purchased from TITK (Rudolstadt, Germany). chloroform (99.3%) and acetone (99.7%) were purchased from Sigma-Aldrich (St. Louis, MO, USA) and Brenntag CEE GmbH (Vienna, Austria). Hydrochloric acid (37%) and sulfuric acid (95%) were obtained from VWR Chemicals (Radnor, PA, USA). 2-Propanol was obtained from Fisher Scientific (Hampton, NH, USA). For the contact angle measurements, Milli-Q water (resistivity = 18.3 Ω⁻¹·cm⁻¹) and diiodomethane were used (Sigma Aldrich, 99%). All chemicals were used without further purification.
The polymer foils Europe 100 economy overhead transparencies were purchased from Avery Zweckform (Oberlaindern, Germany), and PA-6.6 cast film monolayer foils were supplied by BASF SE (Ludwigshafen, Germany). The microstructured copper foil was kindly provided by AT&S (Leoben, Austria), and a nickel foil with a thickness of 40 µm was used. Chromafil Xtra syringe filters made from polyvinylidene difluoride (PVDF)-45/25 0.45 μm pore size (Macherey Nagel, Düren, Germany) were used as obtained.