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Divya Achari,Padmeshwary Rachipudi,Satishkumar Naik,Ramesh Karuppannan,Mahadevappa Kariduraganvar 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.78 No.-
Chitosan-based polyelectrolyte complex membranes (PECMs) were developed by incorporatingpolystyrene sulfonic acid-co-maleic acid (PSSAMA) in the chitosan membrane matrix as a pervaporationmembrane by employing a solution technique. Fourier transform infrared (FTIR) spectroscopy, wideangleX-ray diffraction (WAXD), thermogravimetry analysis (TGA), differential scanning calorimetry(DSC), and scanning electron microscopy (SEM) were used to characterize the membranes. PECMs weretested for their potentiality to separate various azeotropic mixtures; water/ter-butanol, water/isopropanol, water/n-propanol and water/1, 4 dioxane at their azeotropic point. The PECMs containing9 mass% of PSSAMA manifest highest separation selectivity of 5352 with aflux of 4.145 10 2 kg /m2 h forthe azeotropic mixture of water/ter-butanol at 30 C. To confirm their stability at the higher temperature,the PECMs were assessed for pervaporation (PV) separation at 40, 50 and 60 C. For all PECMs totalfluxandflux of water appeared to be coinciding each other, signifying that PECMs could be used successfullyto break the azeotropic point of various azeotropic mixtures. The Arrhenius activation parameters weredetermined by diffusion and permeation values. The activation energy values procured for waterpermeation (Epw) were considerably lower than ter-butanol permeation (EpTBOH). The heat of sorption(DHs) values obtained for PECMs were negative, showing that Langmuir’s mode of sorption is dominant.
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