AI Article Synopsis
Article Abstract
Mixed-matrix membranes based on amorphous and semi-crystalline polyimides with zirconium dioxide (ZrO₂) nanostars were synthesized. Amorphous poly(4,4'-oxydiphenylenepyromellitimide) and semi-crystalline polyimide prepared from 1,4-bis(4-aminophenoxy)benzene and 4,4'-oxydiphthalic anhydride were used. The effect of ZrO₂ nanostars on the structure and morphology of nanocomposite membranes was studied by wide-angle X-ray scattering, scanning electron microscopy, atomic force microscopy, and contact angle measurements. Thermal properties and stability were investigated by thermogravimetric analysis and differential scanning calorimetry. Transport properties of hybrid membranes containing 5 wt % ZrO₂ were tested for pervaporation of a mixture of butanol⁻water with 10 wt % H₂O content. It was found that a significant amount of the ZrO₂ added to the semi-crystalline polyimide is encapsulated inside spherulites. Therefore, the beneficial influence of inorganic filler on the selectivity of mixed-matrix membrane with respect to water was hampered. Mixed-matrix membranes based on amorphous polymer demonstrated the best performance, because water molecules had higher access to inorganic particles.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6431868 | PMC |
| http://dx.doi.org/10.3390/polym8110403 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Novel Mixed-Matrix Pervaporation Membrane Based on Polyether Block Amide Modified with Ho-Based Metal-Organic Framework.
Polymers (Basel)
November 2024
St. Petersburg State University, 7/9 Universitetskaya Nab., St. Petersburg 199034, Russia.
Segmented polymers, such as polyether block amide (PEBA), exhibit unique properties due to the combination of different segments. PEBA consists of soft polyester and rigid polyamide blocks, enabling its use in various industrial applications, including membrane technologies. In this study, PEBA membranes modified with a holmium-based metal-organic framework (Ho-1,3,5-Hbtc) were developed for enhanced pervaporation separation of water/isopropanol and water/phenol mixtures.
View Article and Find Full Text PDFPolymeric Membranes for Liquid Separation: Innovations in Materials, Fabrication, and Industrial Applications.
Polymers (Basel)
November 2024
Chemical Engineering Group, Engineering Sciences and Technology Division, CSIR-NorthEast Institute of Science and Technology, Jorhat 785006, Assam, India.
Polymeric membranes have emerged as a versatile and efficient liquid separation technology, addressing the growing demand for sustainable, high-performance separation processes in various industrial sectors. This review offers an in-depth analysis of recent developments in polymeric membrane technology, focusing on materials' advancements, innovative fabrication methods, and strategies for improving performance. We discuss the underlying principles of membrane separation, selecting suitable polymers, and integrating novel materials, such as mixed-matrix and composite membranes, to enhance selectivity, permeability, and antifouling properties.
View Article and Find Full Text PDFCobalt-Based ZIF Composite Membranes: In Situ Defect Engineering for Enhanced Water Stability and Gas Separation.
Small
December 2024
Department of Chemical and Biomolecular Engineering, Sogang University, Seoul, 04107, Republic of Korea.
Porous coordination polymers with excellent molecular sieving ability, high dispersibility, and good compatibility with engineered polymer matrices hold promise for various industrial applications, such as gas separation and battery separators. Here, an in situ defect engineering approach is proposed for highly processable cobalt (Co)-based zeolitic imidazolate frameworks (ZIFs) with enhanced molecular sieving ability and water stability. By varying alkylamine (AA) modulators, the pore structures and textural properties of ZIFs can be fine-tuned.
View Article and Find Full Text PDFDirectly Gel-Thermal Processing of Linker-Mixed Crystal-Glass Composite Membranes for Sorption-Preferential Gas Separation.
Adv Sci (Weinh)
December 2024
College of Environment and Climate, Jinan University, No. 855, East Xingye Avenue, Panyu District, Guangzhou, 511443, China.
Membrane processes are promising for energy-saving industrial applications. However, efficient separation for some valuable gas mixtures with similar characteristics, such as CH/N and O/N, remains extremely challenging. Metal-organic framework (MOF) membranes have been attracting intensive attention for gas sieving, but it is difficult to manufacture MOF membranes in scalability and precisely tune their transport property.
View Article and Find Full Text PDFPolymer-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.
Permeance-selectivity trade-off and high temperature resilience are key challenges in development of membranes for post-combustion carbon capture. While mixed matrix membranes (MMMs) consisting of polymers and metal-organic frameworks (MOFs) offer the potential to address the challenges, they are limited by the low loading of MOFs in the thin film layer. Herein, we propose an inverse synthesis strategy to form polymer-MOF networks by copolymerizing monomers with functionalized UiO-66 nanoparticles.
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!