Abstract
Composite membranes with a thin selective layer based on poly[1-trimethylsilyl-1-propyne] (PTMSP) and crosslinked PTMSP containing 10 wt % of nanoparticles of porous aromatic frameworks (PAF-11) have been synthesized and studied. Monitoring of changes in the gas transport characteristics of the membranes under ambient conditions for 7500 h has revealed that for all the samples, the transport characteristics abruptly decrease within the first 1000–2000 h; after that, the mass transfer constants gradually change over time. In the case of a composite membrane with the selective layer based on crosslinked PTMSP and PAF-11 nanoparticles, stable permeability values after 7000 h are 2.1, 3.5, and 12.9 m3/(m2 h atm) for N2, O2, and CO2,respectively (at an ideal selectivity of α(O2/N2) = 1.6 and α(CO2/N2) = 6.1); to date, this is the best published result for thin-film composite membranes based on highly permeable glassy polymers.
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ACKNOWLEDGMENTS
The authors thank S.A. Legkov for assistance in IR spectroscopy studies, V.S. Khotimskii for PTMCS provided for the research, and the Center for collective use “New Petrochemical Processes, Polymer Composites, and Adhesives” for the equipment provided for the research.This work was performed under the State task to Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences and supported by the Federal Agency for Scientific Organizations of Russia (state registration AAAA–A-18-118011990199-9).
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Bakhtin, D.S., Kulikov, L.A., Bondarenko, G.N. et al. Stabilization of Gas Transport Properties of Composite Membranes with a Thin PTMSP Selective Layer by Adding Porous Aromatic Framework Nanoparticles and Simultaneous Polymer Crosslinking. Pet. Chem. 58, 790–796 (2018). https://doi.org/10.1134/S0965544118090037
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DOI: https://doi.org/10.1134/S0965544118090037