Stabilization of Gas Transport Properties of Composite Membranes with a Thin PTMSP Selective Layer by Adding Porous Aromatic Framework Nanoparticles and Simultaneous Polymer Crosslinking


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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.

作者简介

D. Bakhtin

Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

编辑信件的主要联系方式.
Email: db2@ips.ac.ru
俄罗斯联邦, Moscow, 119991

L. Kulikov

Faculty of Chemistry, Moscow State University

Email: db2@ips.ac.ru
俄罗斯联邦, Moscow, 119991

G. Bondarenko

Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

Email: db2@ips.ac.ru
俄罗斯联邦, Moscow, 119991

V. Vasilevskii

Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

Email: db2@ips.ac.ru
俄罗斯联邦, Moscow, 119991

A. Maksimov

Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences; Faculty of Chemistry, Moscow State University

Email: db2@ips.ac.ru
俄罗斯联邦, Moscow, 119991; Moscow, 119991

A. Volkov

Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences

Email: db2@ips.ac.ru
俄罗斯联邦, Moscow, 119991

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