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Deswelling of Ultrathin Molecular Layer-by-Layer Polyamide Water Desalination Membranes



Edwin P. Chan


The selective layer of pressure-induced water desalination membranes is an ultrathin and highly crosslinked aromatic polyamide (PA) film that separates salt from water based on differences in diffusion coefficients. Characterizing the transport properties of the selective layer is necessary in understanding its permselective performance. However, measuring transport of ultrathin films in general is nontrivial. Here, Poroelastic Relaxation Indentation (PRI) is employed as a simple deswelling technique for measuring the transport properties of these ultrathin selective layers.
Soft Matter


thin films, membranes, water purification, poromechanics, contact mechanics, transport


Chan, E. (2014), Deswelling of Ultrathin Molecular Layer-by-Layer Polyamide Water Desalination Membranes, Soft Matter, [online], (Accessed June 20, 2024)


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Created March 13, 2014, Updated February 19, 2017