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Open AccessArticle

Synthesis and Characterization of Novel Nanoporous Gl-POSS-Branched Polymeric Gas Separation Membranes

SIBUR LLC, 16, bld.3, Krzhizhanovskogo str., GSP-7, 117997 Moscow, Russia
Department of Technology of Synthetic Rubber, Kazan National Research Technological University, 68 Karl Marks str., 420015 Kazan, Russia
Department of Materials Science, Welding and Industrial Safety, Kazan National Research Technical University n.a. A.N. Tupolev— KAI, 10 Karl Marks str., 420111 Kazan, Russia
Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of Russian Academy of Science, 8 Arbuzov str., 420088 Kazan, Russia
Laboratory of Membrane and Catalytic Processes, Nizhny Novgorod State Technical University, n.a. R.E. Alekseev, 24 Minin str., 603950 Nizhny Novgorod, Russia
Department of Membrane Technology, Mendeleev University of Chemical Technology of Russia, Miusskaya Sq. 9, 125047 Moscow, Russia
Author to whom correspondence should be addressed.
Membranes 2020, 10(5), 110;
Received: 23 March 2020 / Revised: 17 April 2020 / Accepted: 22 May 2020 / Published: 24 May 2020
(This article belongs to the Section Membrane Preparation and Characterization)
Novel nanoporous Gl-POSS-branched polymers based on the macroinitiator of anionic nature, 2,4-toluene diisocyanate, and octaglycidyl polyhedral oligomeric silsesquioxane (Gl-POSS) were obtained as gas separation membranes. The synthesis of polymers was carried out using various loads of Gl-POSS. It was found that the main reaction proceeding with 2,4-toluene diisocyanate is the polyaddition, accompanied by the isocyanate groups opening of the carbonyl part. This unusual opening of isocyanate groups leads to the formation of coplanar acetal nature polyisocyanates (O-polyisocyanate). The terminal O-polyisocyanate links initiate the subsequent opening of the epoxide rings in Gl-POSS. As a result, Gl-POSS serves as a hard and bulky branching agent and creates the specific framing supramolecular structure, which leads to the formation of nanopores in the polymer, where the flexible polyether components are located inside the cavities. Thermal, mechanical, physical, and chemical properties of the obtained polymers were studied at various Gl-POSS contents in the polymer matrix. It was found that these polymers show high selectivity of gas transport properties for pure ammonia relative to nitrogen and hydrogen at ambient temperature. Measurements showed that the gas permeability coefficients and the values of ideal selectivity were in a non-additive dependence to the Gl-POSS content. View Full-Text
Keywords: nanoporous polymers; supramolecular structure; gas transport membranes; gas separation nanoporous polymers; supramolecular structure; gas transport membranes; gas separation
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Zaripov, I.I.; Davletbaeva, I.M.; Faizulina, Z.Z.; Davletbaev, R.S.; Gubaidullin, A.T.; Atlaskin, A.A.; Vorotyntsev, I.V. Synthesis and Characterization of Novel Nanoporous Gl-POSS-Branched Polymeric Gas Separation Membranes. Membranes 2020, 10, 110.

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