Water sorption

The sorption and diffusion properties of water vapor in a new, short-side-chain perfluorosulfonic acid ionomer (PFSI) membrane have been investigated at different temperatures in the range of 35÷120°C. Experiments show that pretreatment of the membranes under vacuum at low temperatures leaves in the

Water vapour sorption kinetics in a H+ form naphtalenic sulfonated polyimide membrane at 25°C has been investigated by using an electronic microbalance (IGA, Hiden). An effective diffusion coefficient Dexp has been calculated from kinetic data by using the Fickian model for the final part of the sor