Fig. 1: Schematic illustration of CIP and AIP processes.
From: Anhydrous interfacial polymerization of sub-1 Å sieving polyamide membrane

Scheme depicting the preparation of (a) CIP-PA and (b) AIP-PA membranes, where PIP, TMC and PA are abbreviations for piperazine, trimesoyl chloride and polyamide, respectively.