In this research, novel mixed matrix membranes (MMMs) were developed to improve organic solvent nanofiltration (OSN), offering high permeance and enhanced rejection, and capable of overcoming the trade–off. Previous studies generally suffered from membranes with low permeability and hydrophobicity. This study investigates the fabrication of PVDF–co–CTFE/MXene membranes through a non–solvent induced phase separation (NIPS) method for application in OSN. Initially, MXene (Ti3C2Tx) nanosheets were synthesized from MAX phase (Ti3AlC2) powder through chemical etching with HCl–LiF solution. The structure and chemical composition of the resulting MXene nanosheets were subsequently characterized. The results verified the successful synthesis and high quality of the synthesized nanosheets. MMMs with various weight percentages of MXene nanosheets (0.25, 0.5, 1, and 2 wt%) were fabricated. A comprehensive analysis of the membranes\\\' morphology, chemical structure, hydrophilicity, mechanical strength, zeta potential, and swelling behavior was performed. Performance evaluation also included pure ethanol permeance (PEP) and rejection rates for soybean oil/ethanol and Rose Bengal (RB)/ethanol mixtures. Among the tested membranes, the membrane containing 0.5 wt% MXene (M–0.5) demonstrated the best performance. The PEP of M–0.5 was 12.34 L m-2 h-1 bar-1, compared to 0.93 L m-2 h-1 bar-1 for the bare PVDF–co–CTFE membrane (M0), indicating nearly a 12–fold increase. The rejection rates of RB dye and soybean oil by the M–0.5 membrane were 91.7% and 99.4%, respectively, compared to 88.2% and 99.0% for the M0 membrane. These results demonstrate that, in addition to increased permeance, rejection was also enhanced.

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