VOC sorption in glassy polyimides-Measurements and modeling

▸ We measure non-Fickian organic solvent (VOC) sorption in glassy polyimides. ▸ These polyimides (P84, Matrimid) are important Nanofiltration membrane materials. ▸ VOC-sorption speeds are found to be different in both important polyimides. ▸ Non-Fickian VOC-sorption is modeled using a Maxwell-Stefan diffusion model. ▸ Diffusion coefficients are fitted to experimental data of the polyimide/VOC systems.