کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
634378 | 1456068 | 2013 | 7 صفحه PDF | دانلود رایگان |

Using computational approaches we predict the microstructure of high-performance alkaline polymer, quaternary ammonium polysulfone hydroxide (QAPS-OH) membranes, dry and with ∼14 wt% water uptake. The microstructure can be described as a hydrophobic polymer backbone penetrated by a network of three-dimensional interlinked hydrophilic channels of different diameters. Mobile OH-anions are distributed inside the channels. OH diffusion coefficients and corresponding activation energy were calculated from our molecular dynamics simulations of the QAPS-OH membrane at different temperatures. The predicted values are consistent with available experimental data. Possible mechanisms of the OH-anion diffusion have been discussed.
► We model the microstructure and OH-diffusion in dry and hydrated QAPS-OH membranes.
► Our predicted OH-diffusion and activation energies are consistent with experiment.
► Structural characteristics of the QAPS-OH membranes are revealed and discussed.
► Mechanisms of the OH-anion diffusion in a QAPS-OH membrane are discussed.
Journal: Journal of Membrane Science - Volume 431, 15 March 2013, Pages 79–85