Facile preparation of CuMOF-modified multifunctional nanofiber membrane for high-efficient filtration/separation in complex environments

In this study, a multifunctional polyetherimide (PEI) nanofiber membrane decorated by Cu-based metal-organic framework (CuMOF) was proposed for high-efficient filtration/separation in complex environments. In the presence of CuMOF, the hybrid nanofiber membrane exhibited effective antibacterial ability, lotus leaf-like selfcleaning function, and enhanced particulate matter (PM) capture capacity. Significantly, the removal efficiency of resultant membrane for PM of 0.3 mu m, 0.5 mu m and 0.8 mu m was as high as 99.94 %, 99.95 % and 99.99 %, respectively, and the filtration efficiency for particles of >= 1.25 mu m could reach nearly 100 %. Due to the excellent stability of PEI and CuMOF, the hybrid nanofiber membrane maintained a high removal ability after high temperature (up to 200 degrees C), acidic and alkaline treatment, and still displayed outstanding recyclability and long-term purification capacity in seriously PM polluted level of > 800 mu g/m3. Furthermore, the special selective wettability of hydrophobicity and lipophilicity, as well as the structural stability, enabled the obtained membrane present superior oil/water separation efficiency even in highly salty, acidic and alkaline environments. This work provides a facile and effect approach for the development of comprehensive nanofiber material for various filtration and separation applications.

Automated summary

In this study, a multifunctional polyetherimide (PEI) nanofiber membrane decorated by Cu-based metal-organic framework (CuMOF) was developed for high-efficient filtration/separation. The hybrid membrane exhibited effective antibacterial ability, self-cleaning function, and enhanced particulate matter (PM) capture capacity. It also demonstrated superior oil/water separation efficiency and stability in complex environments.