Kinetics of water vapor sorption in sulfonated polyimide membranes

Sulfonated hydrocarbon membranes for medium-temperature and low-humidity proton exchange membrane fuel cells (PEMFCs)

“…16) [72,75,91,92]. However, BDSA-based SPIs have exhibited a relatively low hydrolytic stability despite attempts to improve this through the introduction of a six-membered ring of naphthalenic anhydride [93].…”

Water vapor permeation in polyimide membranes

“…Water clusters will also be more effective in swelling the polymeric matrix, enhancing plasticization effects. Conversely, some authors report that water clusters can hinder the diffusion of other water molecules, resulting in a diminished increase [17] or a decrease [28] in the water diffusivity as the water vapour activity increases.…”

Measurement of transport phenomena of volatile compounds: A review

“…However, these automatic apparatus have some limitations, such as the necessary time delay in the establishment of the concentration equilibrium at the surface of the system or the upper limit in regulation of the pressure as well as the establishment of pseudo-equilibrium for high activities (Detallante et al, 2002;Gouanvé, Marais, Bessadok, Langevin, & Métayer, 2007). To overcome the limitation at high activities, a new method based on pressure drops has been validated to determine water diffusivity through gelatine gels (Baucour & Daudin, 2000).…”