Fig. 1: Superhydrophobic hierarchical porous PES membrane.
From: A super liquid-repellent hierarchical porous membrane for enhanced membrane distillation
a Schematic of the hierarchical porous structure of nanofilament-coated membrane, which can concurrently enhance the wetting resistance and vapor permeability. b–e Scanning electron microscopy (SEM) top view images of membranes (b, c) pristine PES-8 membrane, (d, e) nanofilament-coated PES-8 membrane at different magnifications. f, g Cross-section SEM images of the nanofilament-coated PES-8 membrane with hierarchical porous structures. Yellow arrows in (f, g) denote the nano-porous outer layer on top of micro-porous structures. Red dashed lines represent one of the micro-porous paths inside the membrane. h Pore size distribution of the nanofilaments coating, pristine PES-8, PE-0.2 and PTFE-0.2 membranes.
