Robust preparation of braid-reinforced hollow fiber membrane covered by PVDF nanofibers and PVDF/SiO2 micro/nanospheres for highly efficient emulsion separation

•The PVDF hollow fiber membrane with nanofibers and micro/nanospheres was prepared.•The micro/nanospheres were restricted by deposited nanofibers to prevent shedding.•Three-D micro/nano structure was adjusted by adding SiO2 in electrospray solution.•The membrane had excellent mechanical property and oil-water separation property.