Development of bivalent cation selective ion exchange membranes by varying molecular weight of polyaniline

Farrokhzad, Hasan; Darvishmanesh, Siavash; Genduso, Giuseppe; Gerven, Tom Van; Bruggen, Bart Van der

doi:10.1016/j.electacta.2015.01.062

Cited by 59 publications

(21 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A quite efficient modifying agent for this aim is polyaniline (PANI) due to its high conductivity, chemical and thermal stability [ 12 ]. The efficiency of the application of the PANI-modified ion exchange membrane in the separation of singly- and multiply-charged ions (including acid solutions) has been shown in [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. The size of the membrane operating area in those papers is insufficient for scaling the experimental results to industrial electrodialysis apparatus.…”

Section: Introductionmentioning

confidence: 99%

Permselectivity of Cation Exchange Membranes Modified by Polyaniline

Фалина

Loza

et al. 2021

Membranes

View full text Add to dashboard Cite

This work discusses the applicability of polyaniline-modified cation exchange membranes for the separation of monovalent/divalent cations by electrodialysis. A novel method of membrane modification directly in the electrodialysis unit is used to prepare permselective membranes. Complex characterization of the membranes before and after modification allows revealing the influence of membrane matrix on the modification efficiency. The characterization of the membranes includes determination of the diffusion permeability, specific conductivity and current–voltage curves in HCl, NaCl and CaCl2 solutions, as well as transport-structural parameters of the extended three-wire model. The characterization results are used to predict the influence of the modification on membrane permselectivity. The competitive mass transfer of singly and doubly charged cations in the electrodialysis process is investigated in underlimiting and overlimiting currents. Electrodialysis desalination of a solution containing Na+/Ca2+ or H+/Ca2+ cations shows that the modification leads to an increase in membrane permselectivity to single-charged cations due to the repulsion of Ca2+ ions from the positively charged membrane surface. The permselectivity of the polyaniline-modified perfluorinated membrane to H+ in the mixture of H+/Ca2+ cations is observed in all current regimes.

show abstract

Section: Introductionmentioning

confidence: 99%

Permselectivity of Cation Exchange Membranes Modified by Polyaniline

Фалина

Loza

et al. 2021

Membranes

View full text Add to dashboard Cite

show abstract

“…PVDF polymers have been previously used to reduce methanol crossover to a certain limit; however, despite this convenience, PVDF polymers have hydrophobic properties that diminish the ion exchange capacity and proton conductivity of membrane [140][141][142]. This problem can be overcome by modifying PVDF polymers through sulphonation and blending SPVDF with CS, producing a blended membrane with good mechanical strength, water uptake, and retention capacity [143,144]. With increasing content of SPVDF in the blend membrane, water uptake and ion exchange capacity values increased by ≈50% and 0.22 mmol g −1 , respectively.…”

Section: Cs/polymer Blend Membranesmentioning

confidence: 99%

Review of Chitosan-Based Polymers as Proton Exchange Membranes and Roles of Chitosan-Supported Ionic Liquids

Rosli

Loh

Wong

et al. 2020

IJMS

View full text Add to dashboard Cite

Perfluorosulphonic acid-based membranes such as Nafion are widely used in fuel cell applications. However, these membranes have several drawbacks, including high expense, non-eco-friendliness, and low proton conductivity under anhydrous conditions. Biopolymer-based membranes, such as chitosan (CS), cellulose, and carrageenan, are popular. They have been introduced and are being studied as alternative materials for enhancing fuel cell performance, because they are environmentally friendly and economical. Modifications that will enhance the proton conductivity of biopolymer-based membranes have been performed. Ionic liquids, which are good electrolytes, are studied for their potential to improve the ionic conductivity and thermal stability of fuel cell applications. This review summarizes the development and evolution of CS biopolymer-based membranes and ionic liquids in fuel cell applications over the past decade. It also focuses on the improved performances of fuel cell applications using biopolymer-based membranes and ionic liquids as promising clean energy. Int. J. Mol. Sci. 2020, 21, 632 2 of 52 used to exchange protons from the anode to the cathode [1]. PEMFCs are light, highly efficient, and compact. They operate at relatively low temperatures (≈80 • C), have high power density, and are suitable for various applications. Figure 1 shows that PEMFC consists of various important elements, namely, bipolar plates, diffusion layers, electrodes (anode and cathode), and an electrolyte. The core of a PEMFC is a membrane electrode assembly (MEA) composed of a proton exchange membrane (PEM) placed between two electrodes. Int. J. Mol. Sci. 2019, 20, x FOR PEER REVIEW 2 of 53 Int. J. Mol. Sci. 2020, 21, 632 3 of 52Polysaccharides, such as chitosan (CS) and cellulose, are among the best natural polymer materials because of their abundance in the environment. CS is a linear polysaccharide consisting of randomly distributed β-(1-4)-linked d-glucosamine (deacetylated unit) and N-acetyl-d-glucosamine (acetylated unit), which is produced by the deacetylation of chitin. CS has high water affinity properties as there is the presence of three different polar functional groups, which are hydroxyl (-OH), primary amine (-NH 2 ), and C-O-C groups. CS has a structure that is very similar to cellulose, but the difference among them is that CS contains amine groups and its structure is characterized by its molecular weight and degree of deacetylation, where its solubility is depended on [7].CS has rigid structure and high crystallinity as there are three hydrogen atoms strongly bonded between the amino and hydroxyl groups within the CS monomers, due to the immobilized structure, which leads to its proton conduction limitation. Moreover, CS has attractive physicochemical properties in aqueous solution due to its polycationic nature and this leads to wide range of biological purposes such as antimicrobial activity and disease resistance activities in plants [8]. CS membranes are one of the most preferable and favorable materials to re...

show abstract

“…A lot of researches are focused on Nafion® membranes modified by polyaniline (PANI) since they exhibit unique electrical, electrochemical, and optical properties [1][2][3]. These materials are perspective for using both in electrochemistry as coating of electrodes [2,[4][5][6][7] and in fuel cells and electromembrane technology as separation diaphragms [8][9][10][11][12][13][14]. The special interest represents application of such composite membranes in electrodialysis processes for concentration of acids solutions.…”

Section: Introductionmentioning

confidence: 99%

Influence of conditions of polyaniline synthesis in perfluorinated membrane on electrotransport properties and surface morphology of composites

Kononenko

Loza

Shkirskaya

et al. 2015

J Solid State Electrochem

View full text Add to dashboard Cite

The conductivity, diffusion, and electroosmotic permeability of composites, obtained in different conditions of polyaniline synthesis on the surface or in volume of perfluorinated MF-4SK membrane, were studied. The oxidative polymerization of aniline was carried out in static conditions in mixture of monomer and oxidant solutions, in concentration field by method of successive diffusion of polymerization solutions through the membrane in water, and in an external electrical field. The concentration of polymerization solutions, the type of electron acceptors, duration of synthesis, and current density were varied to obtain a set of composites. The certain advantages of every method of polyaniline chemical template synthesis were revealed to prepare the materials with required set of the electrotransport characteristics.

show abstract

Development of bivalent cation selective ion exchange membranes by varying molecular weight of polyaniline

Cited by 59 publications

References 28 publications

Permselectivity of Cation Exchange Membranes Modified by Polyaniline

Permselectivity of Cation Exchange Membranes Modified by Polyaniline

Review of Chitosan-Based Polymers as Proton Exchange Membranes and Roles of Chitosan-Supported Ionic Liquids

Influence of conditions of polyaniline synthesis in perfluorinated membrane on electrotransport properties and surface morphology of composites

Contact Info

Product

Resources

About