A Janus Mesh with Robust Interface and Controllable Wettability for Water Transport

Figure 5

Bonding and welding morphology of PVDF-HFP/CA Janus membrane with robust surface and interface after NaOH treatment. (a) SEM image of CA fibers treated with 0.05 mol/L NaOH; (b) SEM image of PVDF-HFP fibers treated with 0.05 mol/L NaOH; (c) cross section of PVDF-HFP/CA Janus membrane under a microscope; (d) CA surface after 0.05 mol/L NaOH treatment and enlarged view; (e) CA surface after 0.1 mol/L NaOH treatment and enlarged view; (f) the schematic diagram of PVDF-HFP/CA composite membrane with bonding structure after NaOH treatment; (g) flexible and robust PVDF-HFP/CA Janus membrane can be wound on glass rods.