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Polyelectrolyte complex membranes made of chitosan-PSSAMA for pervaporation separation of industrially important azeotropic mixtures

Achari, Divya and Rachipudi, Padmeshwary and Naik, Satishkumar and Karuppannan, Ramesh and Kariduraganavar, Mahadevappa (2019) Polyelectrolyte complex membranes made of chitosan-PSSAMA for pervaporation separation of industrially important azeotropic mixtures. In: JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 78 . pp. 383-395.

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Official URL: https://dx.doi.org/10.1016/j.jiec.2019.05.031

Abstract

Chitosan-based polyelectrolyte complex membranes (PECMs) were developed by incorporating polystyrene sulfonic acid-co-maleic acid (PSSAMA) in the chitosan membrane matrix as a pervaporation membrane by employing a solution technique. Fourier transform infrared (FTIR) spectroscopy, wide-angle X-ray diffraction (WAXD), thermogravimetry analysis (TGA), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) were used to characterize the membranes. PECMs were tested for their potentiality to separate various azeotropic mixtures; water/ter-butanol, water/isopropanol, water/n-propanol and water/l, 4 dioxane at their azeotropic point. The PECMs containing 9 mass% of PSSAMA manifest highest separation selectivity of 5352 with a flux of 4.145 x 10(-2) kg/m(2) h for the azeotropic mixture of water/ter-butanol at 30 degrees C. To confirm their stability at the higher temperature, the PECMs were assessed for pervaporation (PV) separation at 40, 50 and 60 degrees C. For all PECMs total flux and flux of water appeared to be coinciding each other, signifying that PECM5 could be used successfully to break the azeotropic point of various azeotropic mixtures. The Arrhenius activation parameters were determined by diffusion and permeation values. The activation energy values procured for water permeation (E-pw) were considerably lower than ter-butanol permeation (E-pTBOH). The heat of sorption (Delta Hs) values obtained for PECMs were negative, showing that Langmuir's mode of sorption is dominant. (C) 2019 The Korean Society of Industrial and Engineering Chemistry.

Item Type: Journal Article
Additional Information: copyright for this article belongs to ELSEVIER SCIENCE INC
Keywords: Chitosan; Polyelectrolyte complex; Azeotropic mixtures; Pervaporation; Selectivity; Activation energy
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 12 Sep 2019 10:13
Last Modified: 12 Sep 2019 10:13
URI: http://eprints.iisc.ac.in/id/eprint/63387

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