scholarly journals Synthesis and characterization of imidazolium-mediated Tröger's base containing poly(amide)-ionenes and composites with ionic liquids for CO2 separation membranes

2020 ◽  
Vol 11 (46) ◽  
pp. 7370-7381
Author(s):  
Irshad Kammakakam ◽  
Jason E. Bara ◽  
Enrique M. Jackson
Keyword(s):  
Ionic Liquids ◽  
Gas Separation ◽  
Selective Separation ◽  
Polymeric Membranes ◽  
Synthesis And Characterization ◽  
Co2 Separation ◽  
Separation Processes ◽  
Separation Membranes ◽  
Troger's Base

Considerable attention has been given to polymeric membranes either containing, or built from, ionic liquids (ILs) in gas separation processes due to their selective separation of CO2 molecules.

scholarly journals Synthesis and characterization of polybenzimidazoles derived from tetraaminodiphenylsulfone for high temperature gas separation membranes

Polymer ◽  
2015 ◽  
Vol 71 ◽  
pp. 135-142 ◽  
Author(s):  
Hailun Borjigin ◽  
Kevin A. Stevens ◽  
Ran Liu ◽  
Joshua D. Moon ◽  
Andrew T. Shaver ◽  
...  
Keyword(s):  
High Temperature ◽  
Gas Separation ◽  
Synthesis And Characterization ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
High Temperature Gas

scholarly journals Ultra-selective molecular-sieving gas separation membranes enabled by multi-covalent-crosslinking of microporous polymer blends

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiuling Chen ◽  
Yanfang Fan ◽  
Lei Wu ◽  
Linzhou Zhang ◽  
Dong Guan ◽  
...  
Keyword(s):  
Gas Separation ◽  
High Performance ◽  
Chain Scission ◽  
Crosslinking Reaction ◽  
Separation Processes ◽  
Separation Membranes ◽  
Covalent Crosslinking ◽  
Polymer Of Intrinsic Microporosity ◽  
Troger's Base ◽  
Molecular Sieving

AbstractHigh-performance membranes exceeding the conventional permeability-selectivity upper bound are attractive for advanced gas separations. In the context microporous polymers have gained increasing attention owing to their exceptional permeability, which, however, demonstrate a moderate selectivity unfavorable for separating similarly sized gas mixtures. Here we report an approach to designing polymeric molecular sieve membranes via multi-covalent-crosslinking of blended bromomethyl polymer of intrinsic microporosity and Tröger’s base, enabling simultaneously high permeability and selectivity. Ultra-selective gas separation is achieved via adjusting reaction temperature, reaction time and the oxygen concentration with occurrences of polymer chain scission, rearrangement and thermal oxidative crosslinking reaction. Upon a thermal treatment at 300 °C for 5 h, membranes exhibit an O2/N2, CO2/CH4 and H2/CH4 selectivity as high as 11.1, 154.5 and 813.6, respectively, transcending the state-of-art upper bounds. The design strategy represents a generalizable approach to creating molecular-sieving polymer membranes with enormous potentials for high-performance separation processes.

Synthesis and Characterization of Macrocyclic Ionic Liquids for CO2 Separation

2021 ◽  
Author(s):  
Bishnu Prasad Thapaliya ◽  
Nicolette G. Puskar ◽  
Samantha Slaymaker ◽  
Nicole Onishi Feider ◽  
Chi-Linh Do-Thanh ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Synthesis And Characterization ◽  
Co2 Separation

Synthesis and characterization of triptycene-based polyimides with tunable high fractional free volume for gas separation membranes

2014 ◽  
Vol 2 (33) ◽  
pp. 13309-13320 ◽  
Author(s):  
Jennifer R. Wiegand ◽  
Zachary P. Smith ◽  
Qiang Liu ◽  
Christopher T. Patterson ◽  
Benny D. Freeman ◽  
...  
Keyword(s):  
Free Volume ◽  
Gas Separation ◽  
Gas Transport ◽  
Synthesis And Characterization ◽  
Fractional Free Volume ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
Selective Separations ◽  
Polyimide Membranes

Triptycene-containing polyimide membranes with tunable fractional free volume promoting fast gas transport and selective separations.

scholarly journals Synthesis and Characterization of Ionene-Polyamide Materials as Candidates for New Gas Separation Membranes

MRS Advances ◽  
2018 ◽  
Vol 3 (52) ◽  
pp. 3091-3102 ◽  
Author(s):  
Jason E. Bara ◽  
Kathryn E. O’Harra ◽  
Marlow M. Durbin ◽  
Grayson P. Dennis ◽  
Enrique M. Jackson ◽  
...  
Keyword(s):  
Gas Separation ◽  
Polymer Membranes ◽  
Synthesis And Characterization ◽  
Melting Points ◽  
Polymer Backbone ◽  
Separation Membranes ◽  
New Family ◽  
Gas Separation Membranes ◽  
Aromatic Amide

AbstractA new family of six ionenes containing aromatic amide linkages has been synthesized from ready available starting materials at scales up to ∼50 g. These ionene-polyamides are all constitutional isomers and vary only in the regiochemistry of the amide linkages (para, meta) and xylyl linkages (ortho, meta, para) which are present in the polymer backbone. This paper details the synthesis of these ionenes and associated characterizations. Ionene-polyamides exhibit relatively low melting points (∼150 oC) allowing them to be readily processed into films and other objects. These ionene-polyamide materials are being developed for further study as polymer membranes for the separations of gases such as CO2, N2, CH4 and H2.

Thermally rearranged polybenzoxazole copolymers incorporating Tröger's base for high flux gas separation membranes

2020 ◽  
Vol 612 ◽  
pp. 118437 ◽  
Author(s):  
Xiaofan Hu ◽  
Won Hee Lee ◽  
Joon Yong Bae ◽  
Ju Sung Kim ◽  
Jun Tae Jung ◽  
...  
Keyword(s):  
Gas Separation ◽  
High Flux ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
Troger's Base

scholarly journals A radical polymer for highly efficient solar evaporation and gas separation

2021 ◽  
Author(s):  
Wei Liu ◽  
Ming Yang ◽  
Jing Liu ◽  
Meijia Yang ◽  
Jing Li ◽  
...  
Keyword(s):  
Gas Separation ◽  
Membrane Separation ◽  
Hydrogen Separation ◽  
Solar Irradiation ◽  
Separation Processes ◽  
Highly Efficient ◽  
Separation Membranes ◽  
Gas Separation Membranes ◽  
Transport Channels ◽  
The Impact

Abstract The unique magnetic, electronic and optical features derived from their unpaired electrons have made radical polymers an attractive material platform for various applications. Here, we report solution-processable radical polymer membranes with multi-level porosities and study the impact of free radicals on important membrane separation processes including solar vapor generation, hydrogen separation and CO2 capture. The radical polymer is a supreme light absorber over the full solar irradiation range with sufficient water transport channels, leading to a highly efficient solar evaporation membrane. In addition, the radical polymer with micropores and adjustable functional groups are broad-spectrum gas separation membranes for both hydrogen separation and CO2 capture. First principle calculations indicate that the conjugated polymeric network bearing radicals is more chemically reactive with CO2, compared with H2, N2 and CH4. This is evidenced by a high CO2 permeability in gas separation membranes made of the conjugated radical polymer.

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