Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Membrane Science called Thin-film composite membranes based on hyperbranched poly(ethylene oxide) for CO2/N2 separation, Author is Zhang, Gengyi; Tran, Thien N.; Huang, Liang; Deng, Erda; Blevins, Adrienne; Guo, Wenji; Ding, Yifu; Lin, Haiqing, which mentions a compound: 7789-45-9, SMILESS is [Cu+2].[Br-].[Br-], Molecular Br2Cu, Application In Synthesis of Cupric bromide.
Crosslinked amorphous poly(ethylene oxide) (XLPEO) is one of the leading membrane materials for post-combustion CO2 capture. For example, XLPEO prepared from poly(ethylene glycol) Me ether acrylate (PEGMEA) exhibited CO2 permeability of 570 Barrer and CO2/N2 selectivity of 41 at 35°C. However, these XLPEOs cannot be dissolved in coating solutions, making it impossible to be fabricated into thin-film composite (TFC) membranes using state-of-the-art manufacturing processes. In this study, we synthesized high mol. weight yet soluble HPEO via atom transfer radical polymerization (ATRP). These polymers were thoroughly characterized and compared with XLPEO, including thermal transitions, free volumes, and pure-gas sorption and permeation properties. A polymer with the best combination of CO2 permeability (540 Barrer) and CO2/N2 selectivity (43) was fabricated into defect-free TFC membranes with a thickness as thin as 506 ± 44 nm. When challenged with simulated flue gas containing water vapor at 35°C for over 100 h, the membrane shows stable CO2 permeance of 850 GPU and CO2/N2 selectivity of 37, comparable to the leading com. membranes for carbon capture.
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Reference:
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