One-pot in-situ deposition toward fabricating superhydrophobic fiberglass membranes with composite microstructure for fast water-in-oil emulsions separation

•A cost-efficient strategy to construct superhydrophobic membranes for separating emulsions.•The deposited stalactite-shaped TiO2-SiO2 nanoparticles increased roughness and hydrophobicity (162.7°).•Ultrafast flux for surfactant stabilized water-in-oil emulsion(3130.4 L m−2 h−1) and high efficiency (>99%).•This membrane exhibits excellent adsorption capacity (4.25–19.07 gg−1), barely changing after 10 cycles.•Staying hydrophobic in strong alkali and acid solution after 20 days, and mechanical strength is enhanced.