TY - JOUR
T1 - High-Pressure Sorption of Carbon Dioxide and Methane in All-Aromatic Poly(etherimide)-Based Membranes
AU - Ogieglo, Wojciech
AU - Madzarevic, Zeljka P.
AU - Raaijmakers, Michiel
AU - Dingemans, Theo J.
AU - Benes, Nieck Edwin
PY - 2016
Y1 - 2016
N2 - The sorption of compressed carbon dioxide and methane in a series of all-aromatic poly(etherimide) (PEI) thin films is presented. The polymer films are derived from the reactions between an arylether diamine (P1) and four different dianhydrides [3,30,4,40-oxydiphthalic dianhydride (ODPA), 3,30,4,40 biphenyltetra-carboxylic dianhydride (BPDA), 3,30,4,40-benzo-phenonetetracarboxylic dianhydride (BTDA), and pyromellitic dianhydride (PMDA)] that have been selected to systematically change the flexibility of the polymer backbone, the segmental mobility, and the nonequilibrium excess free volume (EFV) of the polymer. The EFV, gas sorption capacities, and sorption- and temperature-induced dynamic changes in film thickness and refractive index have been investigated by spectroscopic ellipsometry. The sorption capacity depends to a great extent on the PEI backbone composition. PMDA-P1 shows the highest carbon dioxide sorption, combined with the lowest sorption selectivity because of the predominant sorption of methane in the EFV. For ODPA-P1, the highest sorption selectivity is obtained, while it shows little long-term relaxations at carbon dioxide pressures up to 25 bar.
AB - The sorption of compressed carbon dioxide and methane in a series of all-aromatic poly(etherimide) (PEI) thin films is presented. The polymer films are derived from the reactions between an arylether diamine (P1) and four different dianhydrides [3,30,4,40-oxydiphthalic dianhydride (ODPA), 3,30,4,40 biphenyltetra-carboxylic dianhydride (BPDA), 3,30,4,40-benzo-phenonetetracarboxylic dianhydride (BTDA), and pyromellitic dianhydride (PMDA)] that have been selected to systematically change the flexibility of the polymer backbone, the segmental mobility, and the nonequilibrium excess free volume (EFV) of the polymer. The EFV, gas sorption capacities, and sorption- and temperature-induced dynamic changes in film thickness and refractive index have been investigated by spectroscopic ellipsometry. The sorption capacity depends to a great extent on the PEI backbone composition. PMDA-P1 shows the highest carbon dioxide sorption, combined with the lowest sorption selectivity because of the predominant sorption of methane in the EFV. For ODPA-P1, the highest sorption selectivity is obtained, while it shows little long-term relaxations at carbon dioxide pressures up to 25 bar.
KW - IR-100462
KW - METIS-316960
U2 - 10.1002/polb.24001
DO - 10.1002/polb.24001
M3 - Article
VL - 54
SP - 986
EP - 993
JO - Journal of polymer science. Part B: Polymer physics
JF - Journal of polymer science. Part B: Polymer physics
SN - 0887-6266
IS - 10
ER -