In situ nanoporous structural characterization of asymmetric hollow fiber membranes for desalination using Raman spectroscopy

Observing the nanoporous structure inside membranes has been one of greatest challenges in membrane research, and many recent studies have employed positron annihilation lifetime spectroscopy, among other methods, to gain structural insights. In this report, we demonstrate significant potential Raman spectroscopy for investigating under situ conditions. Sulfonated poly(arylene ether sulfone) cellulose triacetate asymmetric hollow fiber were fabricated their structures examined using spectroscopy. The dimensions, mechanical properties, reverse osmosis (RO) performances also measured. estimated by correlated very well with properties RO performances. This study indicated that represents a promising method detecting desalination applications, furthermore, it would be good tool developing optimized structures.