ABSTRACT With the continuous increase in the discharge of oil‐contaminated wastewater, the development of efficient polymer‐based membranes for oil–water separation has attracted significant attention. In this work, poly(vinylidene fluoride)/poly(methyl methacrylate)/carbon nanotubes composite nanofiber membranes were fabricated via electrospinning, and the effects of CNTs content on membrane microstructure, hydrophobicity, thermal stability, and oil–water separation performance were systematica