Fabrication of anions exchange membrane (AEM) using Polyvinylidene Fluoride(PVDF) to separate glycine via electrodialysis

Abstract

Enormous industrial waste is being produced while manufacturing food supplements, beverages, desserts, medicaments, bakery items, energy, and tonics containing varying quantities of foodstuff like organic acids, vitamins, and amino acids from feedstocks due to operational flaws which is discharged in water or thrown away at open spaces where it is piling up as environmental load besides adding millions of revenue loss annually to the national exchequer in the form of foreign reserve enhancing import bill. These important food items must be restored by separating them from waste at war footings to improve the economy and quality of life regarding environmental cleanliness. Anion exchange membrane-based electrodialysis has emerged as one of the finest techniques to get rid of this unavoidable process flaws besides carrying out technologically matchless and cheap separation of such food items from industrial waste and from the reaction broths where such products are being ruined due to heat and discharging exuberantly with accuracy without further damaging them and polluting the environment. Polyvinylidene fluoride (PVDF) based IEMs were synthesized by introducing varying amounts of ion exchange resin applying the solution blending technique with Methyl 2-pyrrolidone being its compatible organic solvent whereas, a single-step phase inversion opted for pore formation in deionized water-ethanol solution. Subsequently, each membrane was modified with PANI coating to enhance its conductivity. Bubbles were removed from the casting solution by continuous stirring and uniform composite membranes were fabricated. Every membrane showed enhanced conductivity, IEC, superhydrophilicity, and better anion exchange capability. The effect of PANI and varying quantities of ion exchange resin incorporated while fabricating ion exchange membrane in the matrix of PVDF was studied in terms of its separation efficiency of glycine via electrodialysis in feed and glycine product solutions as glycinate ions quantifying with acid-based titration and subsequently verified with HPLCMSMS which is instrumental in designing and developing efficient, most modern anion-exchange membrane (AEM) system on an industrial scale for commercial applications