RT info:eu-repo/semantics/article
T1 A sustainable methodology to produce open-cell porous membranes with control on the dense layer thickness
A1 Cuadra Rodríguez, Daniel
A1 Soto Guzmán, Marvelia Cenit
A1 Carmona del Río, Francisco Javier
A1 Tena Matias, Alberto
A1 Palacio Martínez, Laura
A1 Rodríguez Pérez, Miguel Ángel
A1 Pinto Sanz, Javier
K1 Física de la materia condensada
K1 Química inorgánica
K1 Open-Cell nanostructures
K1 Permeance
K1 Skinless nanocellular foams
K1 Nanoestructuras de celda abierta
K1 Permeabilidad
K1 Espumas nanocelulares sin piel
K1 2210 Química Física
K1 2303 Química Inorgánica
AB A new approach to produce porous membranes with dense or porous top layer is proposed in this work by employing a solvent-free method. PMMA/MAM formulations were selected as a base material in order to create open-cell or close-cell structures by gas dissolution foaming employing CO2 as a blowing agent. Furthermore, by introducing the gas diffusion barrier approach to CO2 dissolution foaming, it is possible to control the thickness of the dense layer in both edges, obtaining defect-free membranes (i.e., completely dense without pin-holes). The effectiveness of nanocellular polymers as gas separation membranes was evaluated. In this way, the permeability, selectivity, and permeance were correlated to the cellular structure (open or close-cell) as well as to the dense layer thickness. Furthermore, the effective thickness of the selective layer has been calculated from gas permeability measurements, obtaining an accurate control of that parameter from the tunable cellular structure. Therefore, membranes composed of desired selective layer and a porous structure as a mechanical support are produced by a solvent-free methodology.
PB Elsevier
SN 2212-9820
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/60177
UL https://uvadoc.uva.es/handle/10324/60177
LA eng
NO Journal of CO2 Utilization, 2023, vol. 74, 102536
NO Producción Científica
DS UVaDOC
RD 23-nov-2024