Defect-free mixed-matrix membranes (MMMs) were prepared by incorporating hydrophilic metal-organic polyhedra (MOPs) into cross-linked polyethylene oxide (XLPEO) for efficient CO separation. Hydrophilic MOPs with triethylene glycol pendant groups, which were assembled by 5-tri(ethylene glycol) monomethyl ether isophthalic acid and Cu ions, were uniformly dispersed in XLPEO without particle agglomeration. Compared to conventional neat XLPEO, the homogenous dispersion of EG -MOPs in XLPEO enhanced CO permeability of MMMs. Upon increasing the amount of EG -MOPs, the membrane performance such as CO /N selectivity was steadily improved because of unsaturated Cu sites at paddle-wheel units, which was confirmed by Cu K-edge XANES and TPD analysis. Therefore, such defect-free MMMs with unsaturated metal sites would contribute to enhance CO separation performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/asia.201701647 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Polymer-MOF Network Enabling Ultrathin Coating for Post-Combustion Carbon Capture.
Angew Chem Int Ed Engl
December 2024
Department of Chemical and Biomolecular Engineering, National University of Singapore, 117585, Singapore.
Article Synopsis
- The development of membranes for post-combustion carbon capture faces challenges such as the trade-off between permeance and selectivity, as well as high temperature resilience.
- Mixed matrix membranes (MMMs) made from polymers and metal-organic frameworks (MOFs) could solve these issues, but they struggle with low MOF loading in thin layers.
- The proposed inverse synthesis strategy allows for high MOF loading (up to 40 wt%) in polymer coatings, significantly enhancing CO permeance and maintaining selectivity at elevated temperatures, paving the way for energy-efficient carbon capture technologies.
Thin Film Composite Mixed-Matrix Membranes Based on Matrimid and Zeolitic Imidazolate Frameworks for CO/N Separation Performance.
Ind Eng Chem Res
November 2024
School of Engineering, University of Edinburgh, Robert Stevenson Rd., Edinburgh EH9 3FB, United Kingdom.
Membrane-based gas separation processes are a technology in continuous evolution. Various types of polymer membranes have been developed, many exhibiting high CO permeability and selective properties over competing gases such as N and CH. In order to be competitive, membranes must be less-expensive, more stable, and more efficient, and their production must be scalable.
View Article and Find Full Text PDFRational Matching of Metal-Organic Frameworks and Polymers in Mixed Matrix Membranes for Efficient Propylene/Propane Separation.
Polymers (Basel)
September 2024
State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin 300387, China.
The exploitation of high-performance membranes selective for propylene is important for developing energy-efficient propylene/propane (CH/CH) separation technologies. Although metal-organic frameworks with a molecular sieving property have been considered promising filler materials in mixed-matrix membranes (MMMs), their use in practical applications has been challenging due to a lack of interface compatibility. Herein, we adopted a surface coordination strategy that involved rationally utilizing carboxyl-functionalized PIM-1 (cPIM) and ZIF-8 to prepare a mixed-matrix membrane for efficient propylene/propane separation.
View Article and Find Full Text PDFNew generation mixed matrix membrane for CO separation: Transition from binary to quaternary mixed matrix membrane.
Chemosphere
April 2024
Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India. Electronic address:
Contemporary advances in material development associated with membrane gas separation refer to the cost-effective fabrication of high-performance, defect-free mixed matrix membranes (MMMs). For clean energy production, natural gas purification, and CO capture from flue gas systems, constituting a functional integration of polymer matrix and inorganic filler materials find huge applications. The broad domain of research and development of MMMs focused on the selection of appropriate materials, inexpensive membrane fabrication, and comparative study with other gas separation membranes for real-world applications.
View Article and Find Full Text PDFHigh-Performance Mixed-Matrix Membranes Using a Zeolite@MOF Core-Shell Structure Synthesized via Ion-Exchange-Induced Crystallization and Post-Synthetic Conversion.
JACS Au
January 2024
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea.
Strategic design of nanostructures, such as the core-shell configuration, offers a promising avenue to harness the desired properties while mitigating the inherent limitations of individual materials. In our pursuit of synergizing the advantages of two distinct porous materials, namely, zeolites and metal-organic frameworks (MOFs), we aimed to develop the zeolite@MOF core-shell structures. To synthesize this targeted material while minimizing undesirable side reactions, we devised an innovative approach involving ion-exchange-induced crystallization and post-synthetic conversion.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!