Chan Edwin P
Materials Science and Engineering Division, National Institute of Standards and Technology, 100 Bureau Drive, MS 8542, Gaithersburg, MD, USA.
Soft Matter. 2014 May 7;10(17):2949-54. doi: 10.1039/c4sm00088a.
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 permeability, which is a product of diffusivity and solubility. 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.
压力诱导水脱盐膜的选择性层是一种超薄且高度交联的芳香族聚酰胺（PA）薄膜，它基于渗透率的差异将盐与水分离，渗透率是扩散率和溶解度的乘积。表征选择性层的传输特性对于理解其选择性渗透性能至关重要。然而，一般来说测量超薄薄膜的传输并非易事。在此，孔隙弹性松弛压痕法（PRI）被用作一种简单的去溶胀技术来测量这些超薄选择性层的传输特性。
