Construction of PPSU-MoS 2 /PA-MIL-101(Cr) Membrane with Highly Enhanced Permeance and Stability for Organic Solvent Nanofiltration.
Qin LiuXing WuZongli XieKaisong ZhangPublished in: Membranes (2022)
Membranes with excellent separation performance and stability are needed for organic solvent nanofiltration in industrial separation and purification processes. Here we reported a newly PPSU-MoS 2 /PA-MIL-101(Cr) composite membrane with high permeance, good selectivity and stability. The MIL-101(Cr) was introduced in the polyamide (PA) layer via the PIP/TMC interfacial polymerization process on a microporous PPSU-MoS 2 substrate. At a small doping amount of 0.005 wt% MIL-101(Cr), the PPSU-MoS 2 /PA-MIL-101(Cr) composite membrane exhibited a high methanol permeance of 12.03 L m -2 h -1 bar -1 , twice higher than that of the pristine membrane without sacrificing selectivity. Furthermore, embedding MIL-101(Cr) notably enhanced the stability of the composite membrane, with permeance only decreasing by 8% after a long time operation of 80 h (pristine membrane decreased by 25%). This work demonstrated a composite membrane modified by MIL-101(Cr) with superior separation performance, which provides potential application of MOF materials for high-performance membranes in organic solvent nanofiltration and a theoretical foundation for future research in studying MOF's influence on membrane properties.