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Structure-property relationship of thermoplastic polyurethane cationomers carrying quaternary ammonium groups. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Park S, Abdul Hamid MR, Jeong HK. Highly Propylene-Selective Mixed-Matrix Membranes by in Situ Metal-Organic Framework Formation Using a Polymer-Modification Strategy. ACS APPLIED MATERIALS & INTERFACES 2019; 11:25949-25957. [PMID: 31256584 DOI: 10.1021/acsami.9b07106] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Despite the potential of C3H6/C3H8 separation, there have been no industrial applications of zeolitic-imidazole framework-8 (ZIF-8) mixed-matrix membranes (MMMs) because of the moderate separation performances and several challenging processing issues. Herein, we present a new paradigm of MMM fabrication, named polymer-modification-enabled in situ metal-organic framework formation (PMMOF), enabling in situ formation of ZIF-8 fillers inside the 4,4-(hexafluoroisopropylidene)diphthalic anhydride 2,4,6-trimethyl-1,3-phenylenediamine polymer. PMMOF consists of four steps including hydrolysis of a polymer, ion-exchange, ligand treatment, and imidization. Each step was thoroughly analyzed and important processing parameters were identified, enabling the structural control of MMMs by PMMOF. The binary C3H6/C3H8 separation performance of the MMMs showed much higher separation factors than conventionally prepared MMMs at similar filler loadings, satisfying the commercial C3H6/C3H8 separation performance criteria. PMMOF was successfully applied for other MOFs, demonstrating that the process could be general. Finally, as a proof of concept, asymmetric mixed-matrix hollow fiber membranes (i.d. of 0.45 mm and o.d. of 0.63 mm) with ultrathin selective skin layers were prepared by PMMOF, showing C3H6 permeance of 2.17 GPU and C3H6/C3H8 separation factor of ∼20.
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Mukaddam M, Wang Y, Pinnau I. Structural, Thermal, and Gas-Transport Properties of Fe 3+ Ion-Exchanged Nafion Membranes. ACS OMEGA 2018; 3:7474-7482. [PMID: 31458904 PMCID: PMC6644835 DOI: 10.1021/acsomega.8b00914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 06/26/2018] [Indexed: 06/10/2023]
Abstract
The physical and gas-transport properties of Fe3+ cross-linked Nafion membranes were examined. Wide-angle X-ray diffraction results revealed a lower crystallinity for Nafion Fe3+ but showed essentially no changes in the average chain spacing upon cation exchange of Nafion H+. Raman and Fourier transform infrared spectroscopy techniques qualitatively measured the strength of the ionic bond between the Fe3+ cations and sulfonate anions. Thermal gravimetric analysis indicated that the incorporation of Fe3+ adversely affected the thermal stability of Nafion due to the catalytic decomposition of perfluoroalkylether side chains. Gas sorption isotherms of Nafion Fe3+ measured at 35 °C up to 20 atm exhibited a linear sorption uptake for O2, N2, and CH4 following Henry's law and slight concave behavior for CO2. Pure-gas permeation results showed reduced gas permeability but higher permselectivities compared to Nafion H+ with αN2/CH4 = 4.0, αCO2/CH4 = 35, and αHe/CH4 = 733 attributable to the strong physical cross-linking effect of Fe3+ that caused chain stiffening with enhanced size-sieving behavior. Gas mixture permeation experiments using 1:1 molar CO2/CH4 feed demonstrated reduced CO2 plasticization for Nafion Fe3+. At 10 atm CO2 partial pressure, CO2/CH4 selectivity decreased to 28 from the pure-gas value of 35, which was a significant improvement compared to the performance of a Nafion H+ membrane.
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Affiliation(s)
- Mohsin Mukaddam
- Functional
Polymer Membranes Group, Advanced Membranes and Porous Materials
Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology
(KAUST), Thuwal 23955, Saudi Arabia
| | - Yingge Wang
- Functional
Polymer Membranes Group, Advanced Membranes and Porous Materials
Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology
(KAUST), Thuwal 23955, Saudi Arabia
| | - Ingo Pinnau
- Functional
Polymer Membranes Group, Advanced Membranes and Porous Materials
Center, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology
(KAUST), Thuwal 23955, Saudi Arabia
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Kamcev J, Freeman BD. Charged Polymer Membranes for Environmental/Energy Applications. Annu Rev Chem Biomol Eng 2016; 7:111-33. [DOI: 10.1146/annurev-chembioeng-080615-033533] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jovan Kamcev
- McKetta Department of Chemical Engineering, Center for Energy and Environmental Resources, and Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78758;
| | - Benny D. Freeman
- McKetta Department of Chemical Engineering, Center for Energy and Environmental Resources, and Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78758;
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In situ regulation of micro-pore to design high performance polyimide membranes for pervaporation dehydration of isopropanol. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.07.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Chen Y, Lin B, Yang H, Sun Y, Zhang X. Dramatic enhancement of carbon nanotube dispersion in polyimide composites by a two-step amino functionalization approach. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26742] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yaqin Chen
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Baoping Lin
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Hong Yang
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Ying Sun
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
| | - Xueqin Zhang
- School of Chemistry and Chemical Engineering; Southeast University; Nanjing 211189 China
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Ma C, Koros WJ. High-performance ester-crosslinked hollow fiber membranes for natural gas separations. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.10.024] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Geise GM, Willis CL, Doherty CM, Hill AJ, Bastow TJ, Ford J, Winey KI, Freeman BD, Paul DR. Characterization of Aluminum-Neutralized Sulfonated Styrenic Pentablock Copolymer Films. Ind Eng Chem Res 2012. [DOI: 10.1021/ie202546z] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Geoffrey M. Geise
- Department
of Chemical Engineering, The University of Texas at Austin, 1 University Station C0400, Austin,
Texas 78712, United States
| | - Carl L. Willis
- Kraton Performance Polymers, Inc., 16400 Park Row, Houston, Texas 77084,
United States
| | - Cara M. Doherty
- CSIRO Materials Science and Engineering & CSIRO Process Science and Engineering, Private Bag 33, South Clayton MDC, Clayton, Victoria 3169, Australia
| | - Anita J. Hill
- CSIRO Materials Science and Engineering & CSIRO Process Science and Engineering, Private Bag 33, South Clayton MDC, Clayton, Victoria 3169, Australia
| | - Timothy J. Bastow
- CSIRO Materials Science and Engineering & CSIRO Process Science and Engineering, Private Bag 33, South Clayton MDC, Clayton, Victoria 3169, Australia
| | - Jamie Ford
- Department
of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, Pennsylvania
19104, United States
| | - Karen I. Winey
- Department
of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, Pennsylvania
19104, United States
| | - Benny D. Freeman
- Department
of Chemical Engineering, The University of Texas at Austin, 1 University Station C0400, Austin,
Texas 78712, United States
| | - Donald R. Paul
- Department
of Chemical Engineering, The University of Texas at Austin, 1 University Station C0400, Austin,
Texas 78712, United States
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Hunger K, Buschhaus L, Schmeling N, Staudt C, Pfeifer A, Kleinermanns K. Characterization of maleimide dimers in photo-cross-linked copolyimide films. Phys Chem Chem Phys 2012; 14:4538-47. [PMID: 22366816 DOI: 10.1039/c2cp23355j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copolyimide membranes are established materials for the separation of gaseous and liquid mixtures. Cross-linking of the polymer strands improves the physical and chemical stability. The photo-cross-linking of a 6FDA-ODA/6FDA-DABA 4 : 1 copolyimide membrane containing maleimide side groups as linker was investigated by FTIR spectroscopy. IR absorption spectra of the copolyimide backbone, 3-hydroxypropyldimethyl maleimide and the copolyimide functionalized with 3-hydroxypropyldimethyl maleimide were measured before and after different irradiation times and compared to each other. For band assignment a normal mode analysis was performed. The backbone of the polymer and the maleimide linker can be well distinguished due to their different spectral band positions. Only the films containing a maleimide moiety perform a photoreaction, the polymer backbone does not interfere. Based on the difference spectra and the results of the DFT calculations it was shown that the trans- and the cis-cycloadduct as well as the previously suggested 2-2'-adduct without a cyclobutane ring are formed upon UV irradiation. Evidence for an oxetane-like photoproduct was not found. Different time constants for the increase of the product bands were observed. The cycloadduct accumulates with a shorter time constant (τ = 2 to 5 min) than the 2-2'-adduct (τ = 75 min). The yield of the photo-cross-linking reaction was determined by spectral deconvolution and kinetic fitting of several marker bands. For the copolyimide synthesized in this work, a maximum value of 6% was reached. The stiffness of the copolyimide backbone inhibits further photo-cross-linking.
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Affiliation(s)
- Katharina Hunger
- Institute of Physical Chemistry, Heinrich-Heine University, Düsseldorf, Germany
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Ebner AD, Ritter JA. State-of-the-art Adsorption and Membrane Separation Processes for Carbon Dioxide Production from Carbon Dioxide Emitting Industries. SEP SCI TECHNOL 2009. [DOI: 10.1080/01496390902733314] [Citation(s) in RCA: 184] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Majumdar P, Lee E, Gubbins N, Stafslien SJ, Daniels J, Thorson CJ, Chisholm BJ. Synthesis and antimicrobial activity of quaternary ammonium-functionalized POSS (Q-POSS) and polysiloxane coatings containing Q-POSS. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.01.009] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Shi B, Zhang Q, Zhang H, Liu Z, Zhang X. Concentration of benzylpenicillin sodium by polyimide nanofiltration membrane. J Appl Polym Sci 2007. [DOI: 10.1002/app.25670] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Maya EM, de la Torre G, Lozano AE, Torres T, de la Campa JG, de Abajo J. Novel Cobalt (II) Phthalocyanine-Containing Polyimides: Synthesis, Characterization, Thermal and Optical Properties. Macromol Rapid Commun 2006. [DOI: 10.1002/marc.200600483] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Martin DC, Chen J, Yang J, Drummy LF, Kübel C. High resolution electron microscopy of ordered polymers and organic molecular crystals: Recent developments and future possibilities. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/polb.20419] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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