Fig. 1: Design concept of double charge flips of polyamide membranes. | Nature Communications

Fig. 1: Design concept of double charge flips of polyamide membranes.

From: Double charge flips of polyamide membrane by ionic liquid-decoupled bulk and interfacial diffusion for on-demand nanofiltration

Fig. 1

a Schematic illustration of negatively charged polyamide membranes resulting from conventional interfacial polymerization (IP) at the alkane-water interface. The surface charge of these membranes can be altered through multi-step post-modifications. b Schematic illustration of double charge flips of polyamide membranes by ionic liquid (IL)-decoupled bulk/interfacial diffusion during interfacial polymerization. These polyamide membranes via IL-decoupled strategy present double charge flips: surface charge transits following a negative-positive-near-neutral-negative tendency by controlling IL content.

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