Transport Properties of Cation Exchange Membranes in the Presence of Ether Compounds in Electrodialysis

Sata, Toshikatsu; Tanimoto, M.; Kawamura, Kouhei; Matsusaki, Koji

doi:10.1006/jcis.1999.6482

Cited by 20 publications

(12 citation statements)

References 35 publications

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“…Where M(NaOH) was the concentration of standard NaOH solution (mol dm -3 ), V(NaOH) the NaOH solution volume used to neutralized (dm 3 ), W the sample weight (g), 232 the molecular weight of PES repeat unit and 81 the molecular weight of the SO 3 H. The DS of sPES used as matrix polymer in this work is calculated to be ~21%. …”

Section: Sulfonation Reactionmentioning

confidence: 99%

“…Thus, the hydrophilic modification by incorporating hydrophilic modifiers becomes an effective strategy not only to improve fouling resistance but also change the ion selectivity of membranes. Among various modifiers, polyether compounds and poly(ethylene oxide) is widely used and studied [2][3][4] . It had been reported that these modifiers can effectively improve hydrophilicity of membranes without significantly reducing conductivity of ion-exchange membranes [5] .…”

Section: Introductionmentioning

confidence: 99%

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Preparation of new composite membranes for water desalination using electrodialysis

et al. 2008

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The use of polyethersulfone (PES), an excellent but highly hydrophobic thermoplastic, as a matrix material for ionexchange membranes was investigated. To make PES ion-exchangeable, sulfonate groups were introduced to the polymer chains by sulfonation reaction with chlorosulfonic acid. The degree of sulfonation of sPES was estimated to be 21%. Preliminary experiments investigated the effect of polyethylene glycol (PEG) and Pluronic F127 as fillers to improve the hydrophilicity of the membranes. Moreover, a lab scale electrodialysis cell has been designed and set up to evaluate the performance of these novel membranes compared to the benchmark of commercial membranes. The results show promising properties of ion-exchange capacity, water uptake, conductivity and hydophilicity from blended membranes, comparable to commercial membranes, though the performance of the prepared membranes did not exceed the commercial one. Further characterization of the transport properties of ion-exchange membranes need to be investigated to be able to understand the effects of the fillers on the performance of the membranes in ED application.

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Section: Sulfonation Reactionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of new composite membranes for water desalination using electrodialysis

et al. 2008

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“…In regard to cation exchange membrane (CEM), improving the permselectivity of monovalent cations can be achieved generally through three physicochemical effects: pore-size sieving, electrostatic repulsion, and specific interaction effects [ 5 , 9 ]. Following the pore-size sieving effect, the improvement of cross-linking degree [ 10 , 11 ] and formation of hydrophilic/hydrophobic separated structures [ 12 , 13 , 14 ] are the main approaches of altering the structures of membrane matrix to realize cation permselectivity. According to numerous reported studies, surface modification is considered as a facile and efficient approach to prepare monovalent cation permselective membranes (MCPMs).…”

Section: Introductionmentioning

confidence: 99%

Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity

Yang

Liu

et al. 2021

Membranes

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Developing monovalent cation permselective membranes (MCPMs) with high-efficient permselectivity is the core concern in specific industrial applications. In this work, we have fabricated a series of novel cation exchange membranes (CEMs) based on sulfonated polysulfone (SPSF) surface modification by polyethyleneimine (PEI) and 4′-aminobenzo-12-crown-4 (12C4) codeposited with dopamine (DA) successively, which was followed by the cross-linking of glutaraldehyde (GA). The as-prepared membranes before and after modification were systematically characterized with regard to their structures as well as their physicochemical and electrochemical properties. Particularly, the codeposition sequence of modified ingredients was investigated on galvanostatic permselectivity to cations. The modified membrane (M-12C4-0.50-PEI) exhibits significantly prominent selectivity to Li+ ions (PMg2+Li+ = 5.23) and K+ ions (PMg2+K+ = 13.56) in Li+/Mg2+ and K+/Mg2+ systems in electrodialysis (ED), which is far superior to the pristine membrane (M-0, PMg2+Li+ = 0.46, PMg2+K+ = 1.23) at a constant current density of 5.0 mA·cm−2. It possibly arises from the synergistic effects of electrostatic repulsion (positively charged PEI), pore-size sieving (distribution of modified ingredients), and specific interaction effect (12C4 ~Li+). This facile strategy may provide new insights into developing selective CEMs in the separation of specific cations by ED.

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“…[1][2][3][4][5][6][7] Since Juda reported a synthetic ion-exchange membrane, 8 a number of studies have been carried out on synthesis of ion-exchange membranes. [1][2][3][4][5][6][7] In general, an excellent ion-exchange membrane should have high chemical and mechanical stability with favorable electrochemical properties such as low electrical resistance and high ion-permselectivity. 9 To obtain the desired properties of ion-exchange membranes, many preparation methods have been practiced.…”

Section: Introductionmentioning

confidence: 99%

“…Ion exchange membranes have been widely used in electrodialysis for desalination of brackish water, production of table salt, recovery of valuable metals from effluents in the metal‐plating industry, and other purposes 1–7. Since Juda reported a synthetic ion‐exchange membrane,8 a number of studies have been carried out on synthesis of ion‐exchange membranes 1–7. In general, an excellent ion‐exchange membrane should have high chemical and mechanical stability with favorable electrochemical properties such as low electrical resistance and high ion‐permselectivity 9.…”

Section: Introductionmentioning

confidence: 99%

Characterization of semi‐interpenetrating polymer network polystyrene cation‐exchange membranes

Choi

Kang

Moon

2003

J of Applied Polymer Sci

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Polystyrene cation exchange membranes were prepared by a PVC-based semi-interpenetrating polymer network (IPN) method. The reaction behaviors during polymerization and sulfonation in the preparation method were investigated. The prepared membranes were characterized in terms of the physical and electrochemical properties. The membranes exhibited reasonable mechanical properties (tensile strength, 13 MPa, and elongation at break, 52%) for an ion-exchange membrane with the ratio of polystyrene-divinylbenzene (DVB)/poly(vinyl chloride) (PVC) (R St-DVB/PVC ) of below 0.9. Fourier transform infrared/attenuated total reflectance, differential scanning calorimetry, and scanning electron microscopy studies revealed the formation of a homogeneous membrane. The resulting membrane showed membrane electrical resistance of 2.0 ⍀ cm 2 and ion-exchange capacity of 3.0 meq/g dry membrane. The current-voltage (I-V) curves of the membrane show that the semi-IPN polystyrene membranes can be properly used at a high current density, and that the distribution of cationexchange sites in the membrane was more homogenous than that in commercial membranes.

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Transport Properties of Cation Exchange Membranes in the Presence of Ether Compounds in Electrodialysis

Cited by 20 publications

References 35 publications

Preparation of new composite membranes for water desalination using electrodialysis

Preparation of new composite membranes for water desalination using electrodialysis

Cation Exchange Membranes Coated with Polyethyleneimine and Crown Ether to Improve Monovalent Cation Electrodialytic Selectivity

Characterization of semi‐interpenetrating polymer network polystyrene cation‐exchange membranes

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