RT info:eu-repo/semantics/article
T1 Morphological study before and after thermal treatment of polymer-polymer mixed-matrix membranes for gas separations
A1 Prádanos del Pico, Pedro Lourdes
A1 Soto Guzmán, Marvelia Cenit
A1 Carmona del Río, Francisco Javier
A1 Lozano, Ángel E.
A1 Hernández Giménez, Antonio
A1 Palacio Martínez, Laura
K1 Mixed matrix membranes
K1 Gas separation membranes
K1 Gases - Separation
K1 Membranes (Technology)
K1 Membranas (Tecnología)
K1 Separation (Technology)
K1 Separación (Tecnología)
K1 Polymers
K1 Polimeros y polimerización
K1 Microscopy
K1 Grinding and polishing
K1 Materials science
K1 Ciencia de los materiales
K1 2206.10 Polímeros
K1 2204.05 Gases
K1 2301.12 Microscopia
K1 3312 Tecnología de Materiales
AB A good integration of the polymer materials that form a mixed-matrix membrane (MMM) for gas separation is essential to reaching interesting permselective properties. In this work, a porous polymer network (PPN), obtained by combining triptycene and trifluoroacetophenone, has been used as a filler, which was blended with two o-hydroxypolyamides (HPAs) that act as polymer matrices. These polymer matrices have been thermally treated to induce a thermal rearrangement (TR) of the HPAs to polybenzoxazoles (β-TR-PBOs) through a solid-state reaction. For its structural study, various techniques have been proposed that allow us to undertake a morphological investigation into the integration of these materials. To access the internal structure of the MMMs, three different methods were used: a polishing process for the material surface, the partial dissolution of the polymer matrix, or argon plasma etching. The argon plasma technique has not only revealed its potential to visualize the internal structure of these materials; it has also been proven to allow for the transformation of their permselective properties. Force modulation and phase contrast in lift-mode techniques, along with the topographic images obtained via the tapping mode using a scanning probe microscope (SPM), have allowed us to study the distribution of the filler particles and the interaction of the polymer and the filler. The morphological information obtained via SPM, along with that of other more commonly used techniques (SEM, TGA, DSC, FTIR, WASX, gas adsorption, and permeability measurements), has allowed us to postulate the most probable structural configuration in this type of system.
PB MDPI
SN 2073-4360
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/70312
UL https://uvadoc.uva.es/handle/10324/70312
LA eng
NO Polymers, 2024, Vol. 16, Nº. 10, 1397
NO Producción Científica
DS UVaDOC
RD 13-nov-2024