Modification of Poly(4-Methyl-2-Pentyne) in Supercritical Fluid Medium for Production of CO2-Selective Gas-Separation Membranes

Polevaya, V. G.; Vorobei, A. M.; Pokrovskiy, O. I.; Shandryuk, G. A.; Лунин, В. В.; Khotimskiy, V. S.

doi:10.1134/s1990793117080085

Cited by 5 publications

(5 citation statements)

References 17 publications

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“…Brominated PMP was prepared according to [19]. The content of brominated moieties was determined as 26 mol %, Mw = 479 kg•mol −1 , Mw/Mn = 2.…”

Section: Methodsmentioning

confidence: 99%

“…Principal possibility of butylimidazolium (BMIm) quaternization by brominated PMP (PMP-Br), i.e., replacing Br substituents of PMP with in situ formed cationic -BMIm + side group (Figure 1) in the entire volume of PMP was demonstrated in [19]. However, quaternization of more than 15 mol % of initial PMP resulted in the loss of both solubility in common solvents and film-forming properties of the polymer.…”

Section: Introductionmentioning

confidence: 99%

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Modification of Poly(4-methyl-2-pentyne) in the Supercritical Fluid Medium for Selective Membrane Separation of CO2 from Various Gas Mixtures

et al. 2020

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The modification of highly permeable films of brominated 1,2-disubstituted polyacetylene, poly(4-methyl-2-penthyne), via incorporation of in situ formed butylimidazolium bromide is reported for the first time. Principal possibility and efficiency of supercritical CO2 and CHF3 use as reaction media for the corresponding process, namely for quaternization of butylimidazole by brominated polymer are revealed. As a result, we prepared new membrane materials possessing promising properties such as stability toward organic solvents, good mechanical properties and significantly improved CO2-selectivity while maintaining gas permeability at high values. Comparative analysis of the results allowed us to determine content and conditions for the incorporation of butylimidazolium groups optimal for most efficient separation of CO2 from industrial gas mixtures. These results are of interest for the designing of new CO2 selective membranes.

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“…Brominated PMP was prepared according to [19]. The content of brominated moieties was determined as 26 mol %, Mw = 479 kg•mol −1 , Mw/Mn = 2.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modification of Poly(4-methyl-2-pentyne) in the Supercritical Fluid Medium for Selective Membrane Separation of CO2 from Various Gas Mixtures

et al. 2020

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“…The improvement of the membrane characteristics of polyacetylene can also be promoted by the introduction of bromine. For example, regioselective bromination of PTMSP and PMP with N-bromosuccinimide (NBS) makes it possible to obtain Br-containing polymers, which are stable to C 5 -C 12 hydrocarbons and exhibit higher CO 2 /N 2 and CO 2 /H 2 selectivity, retaining the permeability coefficients of the gases at a sufficiently high level (10 2 -10 3 Barrer) [5,6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Gas-Transport Properties of Poly(1-trimethylsilyl-1-propyne)- and Poly(4-methyl-2-pentyne)-Based Chlorinated Polyacetylenes for Membrane Separation of Carbon Dioxide

Kossov

Geiger

Матсон

et al. 2019

Membr. Membr. Technol.

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This work is devoted to the chemical modification of the polymers of 1,2-disubstituted acetylenes for the creation of gas-separation membranes possessing enhanced stability to aliphatic hydrocarbons and CO 2 selectivity. The feasibility of obtaining polyacetylenes containing chlorine atoms in the side substituents of poly(1-trimethylsilyl-1-propyne) (PTMSP) and poly(4-methyl-2-pentyne) (PMP) by radical chlorination with N-chlorosuccinimide has been shown. The reaction has been carried out under mild conditions to minimize the possibility of polymer degradation and other side reactions. The obtained polymers exhibit good mechanical and film-forming properties as well as high thermal stability. Chlorinated PTMSP possesses enhanced stability to alicyclic and aliphatic C 5-C 12 hydrocarbons. It has been shown that in the case of introduction of chlorine into the structure of PTMSP and PMP, the CO 2 /N 2 and CO 2 /CH 4 selectivities increase, with the high level of permeability being retained.

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“…Despite the fact that obtaining functionalized polyacetylenes of different structures as new materials and investigating their properties for membrane separation are important tasks, this class of polymers is still not extensively studied. The information available in the literature on the gas transport properties of substituted polyacetylenes containing ionic liquids in their structure is mainly limited to polymers based on phenyl- and diphenylacetylene derivatives containing imidazole salts as a part of the aromatic substituents [16,17]. In particular, as noted in the work [16], the surface modification of membranes from poly(diphenylacetylenes) containing a bromoethoxy- group with 1-methylimidazole resulted in the CO 2 /N 2 selectivity increase from 16 to 44.…”

Section: Introductionmentioning

confidence: 99%

“…An example of the introduction of imidazole fragments into the polymer matrix of the PTMSP carbon analogue, poly(4-methyl-2-pentyne) (PMP), by heterogeneous modification is known. Quaternization of N -butylimidazole with bromine-containing PMP resulted in a CO 2 /N 2 selectivity increase and, in comparison to the initial polymer, resistance to cycloaliphatic hydrocarbons was also increased [17]. At the same time, in all the aforementioned cases, polymers with a relatively low initial gas permeability were studied.…”

Section: Introductionmentioning

confidence: 99%

Chemical Modification of Poly(1-Trimethylsylil-1-Propyne) for the Creation of Highly Efficient CO2-Selective Membrane Materials

et al. 2019

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The work is devoted to the chemical modification of a polymer that is promising for the creation of gas separation membranes, aimed at increasing the selectivity with respect to CO2. The introduction of ionic liquids into the structure of poly(1-trimethylsilyl-1-propyne) is realized by a two-step process: bromination of the initial polymer with N-bromosuccinimide and subsequent addition of tertiary amine (N-butylimidazole) to it. Depending on the process conditions, the method allows polymers with different contents of the ionic liquid to be obtained. The obtained polymers show good film-forming properties and thermal stability. Depending on the content of the ionic liquid in the polymer matrix, the resistance to aliphatic alicyclic to the majority of halogenated, as well as aromatic hydrocarbons, increases. With an increase of the ionic liquid content in the polymer, the ideal selectivities of CO2/N2 and CO2/CH4 gas pairs increases while maintaining a high level of permeability.

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Modification of Poly(4-Methyl-2-Pentyne) in Supercritical Fluid Medium for Production of CO2-Selective Gas-Separation Membranes

Cited by 5 publications

References 17 publications

Modification of Poly(4-methyl-2-pentyne) in the Supercritical Fluid Medium for Selective Membrane Separation of CO2 from Various Gas Mixtures

Modification of Poly(4-methyl-2-pentyne) in the Supercritical Fluid Medium for Selective Membrane Separation of CO2 from Various Gas Mixtures

Synthesis and Gas-Transport Properties of Poly(1-trimethylsilyl-1-propyne)- and Poly(4-methyl-2-pentyne)-Based Chlorinated Polyacetylenes for Membrane Separation of Carbon Dioxide

Chemical Modification of Poly(1-Trimethylsylil-1-Propyne) for the Creation of Highly Efficient CO2-Selective Membrane Materials

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