Organosilica-Modified Multiblock Copolymers for Membrane Gas Separation
| Autor: | I. M. Davletbaeva, Zulfiya Z. Faizulina, Roman Nikiforov, V. V. Parfenov, Ilnaz I. Zaripov, Alexander V. Arkhipov, Alexander Alentiev |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
modification Materials science Polymers and Plastics Diffusion Supramolecular chemistry Synthetic membrane Organic chemistry General Chemistry Polymer Article 2 4-toluene diisocyanate Membrane gas separation QD241-441 Chemical engineering chemistry Copolymer gas permeability Solubility Selectivity macroinitiator organosubstituted silica derivatives multiblock copolymers polymer membranes |
| Zdroj: | Polymers, Vol 13, Iss 3579, p 3579 (2021) Polymers Volume 13 Issue 20 |
| ISSN: | 2073-4360 |
| Popis: | Organosubstituted silica derivatives were synthesized and investigated as modifiers of block copolymers based on macroinitiator and 2,4-toluene diisocyanate. A peculiarity of the modified block copolymers is the existence in their structure of coplanar rigid polyisocyanate blocks of acetal nature (O-polyisocyanates). Organosubstituted silica derivatives have a non-additive effect on high-temperature relaxation and α-transitions of modified polymers and exhibit the ability to influence the supramolecular structure of block copolymers. The use of the developed modifiers leads to a change in the gas transport properties of block copolymers. The increase of the permeability coefficients is due to the increase of the diffusion coefficients. At the same time, the gas solubility coefficients do not change. An increase in the ideal selectivity for a number of gas pairs is observed. An increase in the selectivity for the CO2/N2 gas pair (from 25 to 39) by 1.5 times demonstrates the promising use of this material for flue gases separation. |
| Databáze: | OpenAIRE |
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