RT info:eu-repo/semantics/article
T1 Morphological, chemical and electrical characterization of a family of commercial nanofiltration polyvinyl alcohol coated polypiperazineamide membranes
A1 Otero Fernández, A.
A1 Díaz, Paola Andrea Borda
A1 Otero, José Antonio
A1 Ibáñez, Raquel
A1 Maroto Valiente, Ángel
A1 Palacio Martínez, Laura
A1 Prádanos del Pico, Pedro Lourdes
A1 Carmona del Río, Francisco Javier
A1 Hernández Giménez, Antonio
K1 Nanofiltration
K1 Nanofiltración
K1 Surface charge
K1 Carga superficial
K1 Surface morphology
K1 Morfología superficial
K1 Wettability
K1 Mojabilidad
AB 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.
PB Elsevier
SN 0014-3057
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/48931
UL https://uvadoc.uva.es/handle/10324/48931
LA eng
NO European Polymer Journal, 2020, vol. 126, 109544
NO Producción Científica
DS UVaDOC
RD 27-abr-2024