2026-04-27T14:34:24Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/489312025-01-30T10:35:42Zcom_10324_48903com_10324_954com_10324_894col_10324_48904

Otero Fernández, A. Díaz, Paola Andrea Borda Otero, José Antonio Ibáñez, Raquel Maroto Valiente, Ángel Palacio Martínez, Laura Prádanos del Pico, Pedro Lourdes Carmona Del Rio, Francisco Javier Hernández Giménez, Antonio 2021-10-06T09:55:05Z 2021-10-06T09:55:05Z 2020 European Polymer Journal, 2020, vol. 126, 109544 0014-3057 https://uvadoc.uva.es/handle/10324/48931 10.1016/j.eurpolymj.2020.109544 Three AFC membranes from PCI, of the thin film composite (TFC) nanofiltration type, have been characterized by using XPS, AFM, Contact angles, Zeta potential and permeation experiments. This plethora of complimentary methods portrays a deep and exhaustive description of these membranes that could be used to tune fabrication and modification of nanofiltration membranes to get better properties. Morphological properties, including porosity, water permeability, fractal dimension, Wenzel parameter and roughness, correlate well with pore sizes. While functional characteristics as, for example wettability correlate well with the O/N ratio. Increasing O/N ratios should be interpreted as caused by increasing PVA coverages. The charge on the membrane’s surface is ordered in a different way for different pH but are quite similar anyway. The effect of charges on retention of 1:1, 1:2 and 2:1 salts (as tested with NaCl, Na2SO4 and CaCl2) increases with increasing O/N and wettability. Consequently, the trend of salt retentions can be explained in terms of the PVA coverage and the details of the amphoteric behavior of the three AFC membranes studied. eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2020 Elsevier Attribution-NonCommercial-NoDerivatives 4.0 Internacional Morphological, chemical and electrical characterization of a family of commercial nanofiltration polyvinyl alcohol coated polypiperazineamide membranes info:eu-repo/semantics/article