Meng Na, Liu Jinxin, Mi Jialing, Chen Xuan, Rong Rong, Hang Junjie, Jiang Zihan
Jiangsu Key Laboratory of Industrial Pollution Control and Resource Reuse, School of Environment Engineering, Xuzhou University of Technology, Xuzhou 221018, China.
School of Technology-Saint Pertersburg Joint Engineering, Xuzhou University of Technology, Xuzhou 221018, China.
Polymers (Basel). 2025 May 27;17(11):1493. doi: 10.3390/polym17111493.
In this study, polyethersulfone (PES)/sulfonated polyethersulfone (SPES) composite nanofiltration membranes doped with different contents of monolayer titanium carbide nanosheets (TiCT) were prepared by the nonsolvent induced phase inversion (NIPS) method. The effects of TiCT 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 TiCT. 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 (MgSO) > sodium sulfate (NaSO) > sodium chloride (NaCl), and water flux reached the peak (18.5 L/m·h·bar). The antibacterial activity of the M2 membrane was significantly enhanced, and its antibacterial rate against increased from 15% (M0) to 58%. This phenomenon was attributed to the synergistic mechanism of the TiCT 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.
在本研究中，采用非溶剂诱导相转化（NIPS）法制备了掺杂不同含量单层碳化钛纳米片（TiCT）的聚醚砜（PES）/磺化聚醚砜（SPES）复合纳滤膜。系统研究了TiCT对膜结构、分离性能和抗菌活性的影响。结果表明，铸膜液的粘度随TiCT含量的增加而显著增加。此外，膜表面孔径先减小后增大；孔隙率和亲水性同步优化；表面负电荷密度增加。M2膜对酸性金黄（MY）和亚甲基蓝（MEB）的截留率超过90%。盐离子截留率顺序为硫酸镁（MgSO）＞硫酸钠（NaSO）＞氯化钠（NaCl），水通量达到峰值（18.5 L/m·h·bar）。M2膜的抗菌活性显著增强，其对 的抗菌率从15%（M0）提高到58%。这种现象归因于TiCT物理捕获效应、活性氧（ROS）生成以及对细菌细胞膜的尖锐边缘损伤的协同作用机制。本研究为开发具有高分离效率和优异抗菌性能的MXene复合膜提供了理论支持和技术途径。
