| Autor: |
Kuzminova A; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia., Dmitrenko M; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia., Salomatin K; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia., Vezo O; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia., Kirichenko S; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia., Egorov S; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia., Bezrukova M; Institute of Macromolecular Compounds, Russian Academy of Sciences, 31 Bolshoy pr., St. Petersburg 199004, Russia., Karyakina A; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia., Eremin A; Institute of Macromolecular Compounds, Russian Academy of Sciences, 31 Bolshoy pr., St. Petersburg 199004, Russia., Popova E; Institute of Macromolecular Compounds, Russian Academy of Sciences, 31 Bolshoy pr., St. Petersburg 199004, Russia.; Faculty of Chemical and Biotechnology, Organic Chemistry Department, Saint-Petersburg State Institute of Technology (Technical University), 24-26/49 Letter A Moskovski Ave., St. Petersburg 190013, Russia.; Faculty of Industrial Drug Technologies, Department of Chemical Technology of Medicinal Substances, Saint-Petersburg State Chemical and Pharmaceutical University, 14 Prof. Popova Str., St. Petersburg 197022, Russia., Penkova A; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia., Selyutin A; Saint-Petersburg State University, 7/9 Universitetskaya Emb., St. Petersburg 199034, Russia. |
| Abstrakt: |
Recently, there has been an active search for new modifiers to create hybrid polymeric materials for various applications, in particular, membrane technology. One of the topical modifiers is metal-organic frameworks (MOFs), which can significantly alter the characteristics of obtained mixed matrix membranes (MMMs). In this work, new holmium-based MOFs (Ho-MOFs) were synthesized for polyether block amide (PEBA) modification to develop novel MMMs with improved properties. The study of Ho-MOFs, polymers and membranes was carried out by methods of X-ray phase analysis, scanning electron and atomic force microscopies, Fourier transform infrared spectroscopy, low-temperature nitrogen adsorption, dynamic and kinematic viscosity, static and dynamic light scattering, gel permeation chromatography, thermogravimetric analysis and contact angle measurements. Synthesized Ho-MOFs had different X-ray structures, particle forms and sizes depending on the ligand used. To study the effect of Ho-MOF modifier on membrane transport properties, PEBA/Ho-MOFs membrane retention capacity was evaluated in vacuum fourth-stage filtration for dye removal (Congo Red, Fuchsin, Glycine thymol blue, Methylene blue, Eriochrome Black T). Modified membranes demonstrated improved flux and rejection coefficients for dyes containing amino groups: Congo Red, Fuchsin (PEBA/Ho-1,3,5-H 3 btc membrane possessed optimal properties: 81% and 68% rejection coefficients for Congo Red and Fuchsin filtration, respectively, and 0.7 L/(m 2 s) flux). |
