Correlation of physicochemical characteristics with pervaporation performance of poly(vinyl alcohol) membranes

Maleic anhydride surface-modification of crosslinked chitosan membrane and its pervaporation performance

“…10 also showed that the separation factor increased while the flux declined with the increase of feed ethanol concentration. This behavior was generally Table 2 Pervaporation performance of the GA-CS membrane and the GA-CS membrane modified by MA for 1 h for the separation of 90 wt% aqueous solutions of organic compounds (GA content: 1%) Organic solvent t ( • C) Separation factor (α) Permeation flux (g/m 2 h) explained by the fact that the CS membrane was inherently hydrophilic and swelled in the feed, which makes the polymer more flexible for both water and ethanol molecules to transport in the membrane [3].…”

“…According to solution-diffusion model, membrane surface structure and property play an important role in the membrane separation performance [2,3]. Surface modifications of polymeric membranes are promising approaches to confer new and improved properties to the existing ones.…”

Investigating the sorption influence of poly(vinyl alcohol) (PVA) at different crosslinking content

“…Previous studies have shown the importance of 25 membrane swelling in transport processes through NF membranes 26 [3,4]. Swelling is a thermodynamic phenomenon in which a 27 solvent transfers from a liquid phase to a polymer phase, and 28 deformation of the polymer network occurs as a result. The 29 swollen material can be considered to be a mixture of solvent and 30 polymer, and the thermodynamics of liquid mixtures can be 31 extended to swollen polymers [5].…”

Sago/PVA blend membranes for the recovery of ethyl acetate from water

“…Secondly, higher water content makes membranes swell thereby increasing the flexibility and network of polymers. However an increase in water content lowers membrane selectivity preventing ethyl acetate and water from permeating the membrane (Hyder et al, 2006). On the other hand, there is a difference in the permeation flux in each membrane.…”

“…Two main advantages of pervaporation are no pollution and high production efficiency (Zhang et al, 2009b;Huang and Yeom, 1991). All chemical and pharmaceutical industries are presently expressing incredible interest in new technologies that offer low energy consumption, high separation efficiency and are eco-friendly in nature (Rachipudi et al, 2011;Hyder et al, 2006). Pervaporation has several applications such as the recovery of water from organic mixtures with, similar boiling point and dehydration (Huang and Yeom, 1991;Hasanog˘lu et al, 2005;Liu et al, 2011).…”