TY - JOUR
T1 - Gas permeation through polyethylene glycol/polytetramethylene glycol based polyurethane–silica mixed matrix membranes and interfacial morphology study via modeling approach
AU - Fakhar, Afsaneh
AU - Zarabadipoor, Mohammadmahdi
AU - Talakesh, Mohammad Mehdi
AU - Sadeghi, Morteza
PY - 2023/5/15
Y1 - 2023/5/15
N2 - A series of mixed matrix membranes (MMMs) based on polyurethane (PU) and silica nanoparticles was fabricated. Three types of PU were synthesized with different polyethylene glycol (PEG)/polytetramethylene glycol ratios (PU0, PU75, and PU100, the corresponding numbers: PEG percent). The MMMs were characterized using FTIR, SEM, and gas permeation measurements (N2, O2, CH4, and CO2). The phase mixing of PU0 and PU75 membranes increased with silica content. This resulted in a decrease in gas permeability, while an increase in CO2/CH4 and CO2/N2 selectivities. The gas separation trend for PU100 membranes was the opposite. The molecular probing approach was served to study the interfacial structure of the MMMs. The existence of a rigidified polymer layer with 2.38 and 2.44 nm thicknesses around silica was revealed through PU0 and PU75 membranes, respectively. In contrary, silica was surrounded by a polymer chain dilution interphase with a thickness of 2.20 nm for PU100 MMMs.
AB - A series of mixed matrix membranes (MMMs) based on polyurethane (PU) and silica nanoparticles was fabricated. Three types of PU were synthesized with different polyethylene glycol (PEG)/polytetramethylene glycol ratios (PU0, PU75, and PU100, the corresponding numbers: PEG percent). The MMMs were characterized using FTIR, SEM, and gas permeation measurements (N2, O2, CH4, and CO2). The phase mixing of PU0 and PU75 membranes increased with silica content. This resulted in a decrease in gas permeability, while an increase in CO2/CH4 and CO2/N2 selectivities. The gas separation trend for PU100 membranes was the opposite. The molecular probing approach was served to study the interfacial structure of the MMMs. The existence of a rigidified polymer layer with 2.38 and 2.44 nm thicknesses around silica was revealed through PU0 and PU75 membranes, respectively. In contrary, silica was surrounded by a polymer chain dilution interphase with a thickness of 2.20 nm for PU100 MMMs.
KW - gas separation
KW - interfacial morphology
KW - mixed matrix membrane
KW - molecular probing approach
KW - polyurethane
KW - silica
UR - http://www.scopus.com/inward/record.url?scp=85150517670&partnerID=8YFLogxK
U2 - 10.1002/app.53831
DO - 10.1002/app.53831
M3 - Article
AN - SCOPUS:85150517670
SN - 0021-8995
VL - 140
SP - 1
EP - 17
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
IS - 19
M1 - e53831
ER -