Open AccessGas separation through polyurethane– ZnO mixed matrix membranes and mathematical modeling of the interfacial morphology
Author(s) -
Fakhar Afsaneh,
Maghami Saeid,
Sameti Elham,
Shekari Monireh,
Sadeghi Morteza
Publication year - 2020
Publication title -
spe polymers
Language(s) - English
Resource type - Journals
ISSN - 2690-3857
DOI - 10.1002/pls2.10023
Subject(s) - polyurethane , materials science , membrane , chemical engineering , fourier transform infrared spectroscopy , isophorone diisocyanate , nanoparticle , polymer , nanocomposite , permeation , polymer chemistry , polymerization , phase inversion , composite material , chemistry , nanotechnology , biochemistry , engineering
A series of polyurethane/ZnO membranes was fabricated via thermal phase inversion of the solution of polymer/nanoparticle in N , N ‐dimethylformamide solvent. The polyurethane synthesis was done via two‐step polymerization method using polytetramethylene glycol, isophorone diisocyanate, and 1,4‐butanediol in the ratio of 1:3:2. Different concentrations of zinc oxide nanoparticles (5, 10, 15, and 20) were incorporated into the polyurethane matrix. FTIR, SEM, and X‐Ray analysis were performed to characterize the membranes. FTIR and SEM results suggests an increment in the phase mixing of polyurethane with ZnO loading. Gas permeation performance through polyurethane‐ZnO mixed matrix membranes with ZnO loading by as much as 20 wt% were elucidated for pure N 2 , O 2 , CH 4 , and CO 2 and gases. Based on the results, all permeability values decreased as the loading of ZnO nanoparticles increased, whereas CO 2 /N 2 and CO 2 /CH 4 selectivities increased. Moreover, interfacial structure of the polyurethane/ZnO nanocomposites were characterized by molecular probing approach. The results revealed the presence of a rigidified polymer chain layer with 65 ± 6 Å thickness around the ZnO nanoparticles.