Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22
Anion-exchange membranes modified with a polyquaternium-22 (PQ-22) polymer were studied for their use in electrodialysis. The use of PQ-22 for modification makes it possible to “replace” weakly basic amino groups on the membrane surface with quaternary amino groups. It was found that the content of...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/12/11/1065 |
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| author | Dmitrii Y. Butylskii Vasiliy A. Troitskiy Maria A. Ponomar Ilya A. Moroz Konstantin G. Sabbatovskiy Mikhail V. Sharafan |
| author_facet | Dmitrii Y. Butylskii Vasiliy A. Troitskiy Maria A. Ponomar Ilya A. Moroz Konstantin G. Sabbatovskiy Mikhail V. Sharafan |
| author_sort | Dmitrii Y. Butylskii |
| collection | DOAJ |
| description | Anion-exchange membranes modified with a polyquaternium-22 (PQ-22) polymer were studied for their use in electrodialysis. The use of PQ-22 for modification makes it possible to “replace” weakly basic amino groups on the membrane surface with quaternary amino groups. It was found that the content of quaternary amino groups in PQ-22 is higher than the content of carboxyl groups, which is the reason for the effectiveness of this polymer even when modifying Ralex AHM-PES membranes that initially contain only quaternary amino groups. In the case of membranes containing weakly basic amino groups, the PQ-22 polymer modification efficiency is even higher. The surface charge of the modified MA-41P membrane increased, while the limiting current density on the current-voltage curves increased by more than 1.5 times and the plateau length decreased by 2.5 times. These and other characteristics indicate that the rate of water splitting decreased and the electroconvective mixing at the membrane surface intensified, which was confirmed by direct visualization of vortex structures. Increasing the surface charge of the commercial MA-41P anion-exchange membrane, reducing the rate of water splitting, and enhancing electroconvection leads to mitigated scaling on its surface during electrodialysis. |
| first_indexed | 2024-03-09T18:51:12Z |
| format | Article |
| id | doaj.art-be0806f065c043b89b17d5fa74bc9c98 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T18:51:12Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-be0806f065c043b89b17d5fa74bc9c982023-11-24T05:48:32ZengMDPI AGMembranes2077-03752022-10-011211106510.3390/membranes12111065Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22Dmitrii Y. Butylskii0Vasiliy A. Troitskiy1Maria A. Ponomar2Ilya A. Moroz3Konstantin G. Sabbatovskiy4Mikhail V. Sharafan5Membrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, RussiaMembrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, RussiaMembrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, RussiaMembrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, RussiaFrumkin Intstitute of Physical Chemistry and Electrochemistry RAS, 31 Leninsky Prospekt, 119071 Moscow, RussiaMembrane Institute, Kuban State University, 149 Stavropolskaya St., 350040 Krasnodar, RussiaAnion-exchange membranes modified with a polyquaternium-22 (PQ-22) polymer were studied for their use in electrodialysis. The use of PQ-22 for modification makes it possible to “replace” weakly basic amino groups on the membrane surface with quaternary amino groups. It was found that the content of quaternary amino groups in PQ-22 is higher than the content of carboxyl groups, which is the reason for the effectiveness of this polymer even when modifying Ralex AHM-PES membranes that initially contain only quaternary amino groups. In the case of membranes containing weakly basic amino groups, the PQ-22 polymer modification efficiency is even higher. The surface charge of the modified MA-41P membrane increased, while the limiting current density on the current-voltage curves increased by more than 1.5 times and the plateau length decreased by 2.5 times. These and other characteristics indicate that the rate of water splitting decreased and the electroconvective mixing at the membrane surface intensified, which was confirmed by direct visualization of vortex structures. Increasing the surface charge of the commercial MA-41P anion-exchange membrane, reducing the rate of water splitting, and enhancing electroconvection leads to mitigated scaling on its surface during electrodialysis.https://www.mdpi.com/2077-0375/12/11/1065anion-exchange membranemembrane modificationpolyquaternium-22surface chargeelectrodialysiswater splitting |
| spellingShingle | Dmitrii Y. Butylskii Vasiliy A. Troitskiy Maria A. Ponomar Ilya A. Moroz Konstantin G. Sabbatovskiy Mikhail V. Sharafan Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22 Membranes anion-exchange membrane membrane modification polyquaternium-22 surface charge electrodialysis water splitting |
| title | Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22 |
| title_full | Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22 |
| title_fullStr | Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22 |
| title_full_unstemmed | Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22 |
| title_short | Efficient Anion-Exchange Membranes with Anti-Scaling Properties Obtained by Surface Modification of Commercial Membranes Using a Polyquaternium-22 |
| title_sort | efficient anion exchange membranes with anti scaling properties obtained by surface modification of commercial membranes using a polyquaternium 22 |
| topic | anion-exchange membrane membrane modification polyquaternium-22 surface charge electrodialysis water splitting |
| url | https://www.mdpi.com/2077-0375/12/11/1065 |
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