ABSTRACT The inherent hydrophobicity of polysulfone (PSf) membranes frequently leads to membrane fouling issues. To address this limitation, a novel composite membrane was developed by incorporating hydrophilic tannic acid‐modified carbon nanotubes (TCNT). The TCNT nanomaterial was synthesized by functionalizing carbon nanotubes (CNTs)─known for their exceptional organic compound adsorption capacity─with tannic acid (TA), which exhibits mussel‐inspired adhesion properties for surface modificatio