Preparation of Highly Antibacterial MXene Nanofiltration Membranes and Investigation of Their Separation Performance.
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| Title: | Preparation of Highly Antibacterial MXene Nanofiltration Membranes and Investigation of Their Separation Performance. |
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| Authors: | Meng, Na1 (AUTHOR) mengna309@163.com, Liu, Jinxin1,2 (AUTHOR), Mi, Jialing1 (AUTHOR), Chen, Xuan2 (AUTHOR), Rong, Rong1 (AUTHOR), Hang, Junjie1 (AUTHOR), Jiang, Zihan1 (AUTHOR) |
| Source: | Polymers (20734360). Jun2025, Vol. 17 Issue 11, p1493. 16p. |
| Subjects: | Bacterial cell membranes, Polyethersulfone, Composite membranes (Chemistry), Membrane separation, Magnesium sulfate, Reactive oxygen species |
| Abstract: | In this study, polyethersulfone (PES)/sulfonated polyethersulfone (SPES) composite nanofiltration membranes doped with different contents of monolayer titanium carbide nanosheets (Ti3C2TX) were prepared by the nonsolvent induced phase inversion (NIPS) method. The effects of Ti3C2TX on membrane structure, separation performance and antibacterial activity were investigated systematically. The results demonstrated that the viscosity of the casting solution increased significantly with the increasing content of Ti3C2TX. In addition, the pore size of the membrane surface first decreased and then increased; porosity and hydrophilicity were optimized synchronously; and the density of negative charges on the surface increased. The M2 membrane showed a rejection rate of more than 90% for Metanil yellow (MY) and methylene blue (MEB). The order of salt ion rejection rates was magnesium sulfate (MgSO4) > sodium sulfate (Na2SO4) > sodium chloride (NaCl), and water flux reached the peak (18.5 L/m2·h·bar). The antibacterial activity of the M2 membrane was significantly enhanced, and its antibacterial rate against Bacillus subtilis increased from 15% (M0) to 58%. This phenomenon was attributed to the synergistic mechanism of the Ti3C2TX physical capture effect, reactive oxygen species (ROS) generation and sharp edge damage to bacterial cell membranes. This study provides theoretical support and a technical path for the development of MXene composite membranes with high separation efficiency and excellent antibacterial properties. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | In this study, polyethersulfone (PES)/sulfonated polyethersulfone (SPES) composite nanofiltration membranes doped with different contents of monolayer titanium carbide nanosheets (Ti3C2TX) were prepared by the nonsolvent induced phase inversion (NIPS) method. The effects of Ti3C2TX on membrane structure, separation performance and antibacterial activity were investigated systematically. The results demonstrated that the viscosity of the casting solution increased significantly with the increasing content of Ti3C2TX. In addition, the pore size of the membrane surface first decreased and then increased; porosity and hydrophilicity were optimized synchronously; and the density of negative charges on the surface increased. The M2 membrane showed a rejection rate of more than 90% for Metanil yellow (MY) and methylene blue (MEB). The order of salt ion rejection rates was magnesium sulfate (MgSO4) > sodium sulfate (Na2SO4) > sodium chloride (NaCl), and water flux reached the peak (18.5 L/m2·h·bar). The antibacterial activity of the M2 membrane was significantly enhanced, and its antibacterial rate against Bacillus subtilis increased from 15% (M0) to 58%. This phenomenon was attributed to the synergistic mechanism of the Ti3C2TX physical capture effect, reactive oxygen species (ROS) generation and sharp edge damage to bacterial cell membranes. This study provides theoretical support and a technical path for the development of MXene composite membranes with high separation efficiency and excellent antibacterial properties. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20734360 |
| DOI: | 10.3390/polym17111493 |
