Fundamental studies on a new series of SPSEBS‐PVA‐QPSEBS bipolar membrane: Membrane preparation and characterization

Venugopal, Krishnaveni; Dharmalingam, Sangeetha

doi:10.1002/app.38098

Cited by 12 publications

(5 citation statements)

References 28 publications

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“…28,29 Poly(4-vinylpyrrolidine) (P4VP) was used in previous research to catalyze the water dissociation reaction in BPM. 28 For the junction of the bipolar membrane, other polymeric materials were integrated as catalysts like polyethylene glycol by casting and electrospinning, 15 polyelectrolyte multilayers, 30 poly vinyl alcohol, 31,32 and poly(acrylic acid). 33 Kim et al presented how a multilayered BPM with a layer of polyacrylonitrile enhances the water dissociation efficiency.…”

Section: Introductionmentioning

confidence: 99%

Entanglement-Enhanced Water Dissociation in Bipolar Membranes with 3D Electrospun Junction and Polymeric Catalyst

Al-Dhubhani¹,

Swart²,

Borneman

et al. 2021

ACS Appl. Energy Mater.

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With the use of bipolar membranes (BPMs) in an expanding range of applications, there is an urgent need to understand and improve the catalytic performance of BPMs for water dissociation, as well as to increase their physical and chemical stability. In this regard, electrospinning BPMs with 2D and 3D junction structures have been suggested as a promising route to produce high-performance BPMs. In this work, we investigate the effect of entangling anion and cation exchange nanofibers at the junction of bipolar membranes on the water dissociation rate. In particular, we compare the performance of different tailor-made BPMs with a laminated 2D junction and a 3D electrospun entangled junction, while using the same type of anion and cation exchange polymers in a single/dual continuous electrospinning manufacturing method. The bipolar membrane with a 3D entangled junction shows an enhanced water dissociation rate as compared to the bipolar membrane with laminated 2D junction, as measured by the decreased bipolar membrane potential. Moreover, we investigate the use of a third polymer, that is, poly(4-vinylpyrrolidine) (P4VP), as a catalyst for water dissociation. This polymer confirmed that a 3D entangled junction BPM (with incorporated P4VP) gives a higher water dissociation rate than does a 2D laminated junction BPM with P4VP as the water dissociation catalyst. This work demonstrates that the entanglement of the anion exchange polymer with P4VP as the water dissociation catalyst in a 3D junction is promising to develop bipolar membranes with enhanced performance as compared to the conventionally laminated membranes.

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Section: Introductionmentioning

confidence: 99%

Entanglement-Enhanced Water Dissociation in Bipolar Membranes with 3D Electrospun Junction and Polymeric Catalyst

Al-Dhubhani¹,

Swart²,

Borneman

et al. 2021

ACS Appl. Energy Mater.

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“…Cationic and anionic functionalized ionomers or sulfonated polystyrene-ethylene-butylene-polystyrene (SPSEBS) and quaternized polystyrene-ethylenebutylene-polystyrene (QPSEBS) ionomers were obtained as per the procedure explained in the S1 section of supporting information [16]. To enhance the ion-exchange capacity (IEC), firmness, and strength of the non-reinforced membranes, it was reinforced with resin and glass fiber.…”

Section: Preparation Of Reinforced Iemsmentioning

confidence: 99%

Development of monopolar and platinum intermediate bipolar membranes: application in desalting brine solution

Venugopal

Dharmalingam

2016

Desalination and Water Treatment

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A B S T R A C TThe desalination process parameters like current efficiency (CE), energy consumption, and acid-base production for the fabricated bipolar membrane (BPM) electrodialysis unit (five compartments of 120 cm 2 active areas) were investigated in this paper using monopolarand bipolar-based ion-exchange membranes (IEMs). Also, the performance of the fabricated unit in removing NaCl was assessed in terms of salinity. Polystyrene-ethylene-butylenepolystyrene was functionalized to prepare the monopolar and bipolar IEMs. In the case of BPM, platinum was used as the intermediate layer. The synthesized IEMs were characterized thermally and by contact angle measurements. A commercially procured monopolar and bipolar ion-exchange membrane made of polystyrene-divinylbenzene was also evaluated for the purpose of comparison. The electrodialysis process using these IEMs reached the highest CE of 66 and 38% with the lowest energy consumption of 0.24 Wh and 1.60 Wh for the synthesized and commercial membrane, respectively.

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“…As the casting method does not include the hot-pressure procedure, layer separation may occur if the two layers lack sufficient combining strength. Finally, the cation and anion exchange layers need to be coordinated in properties [15]. For example, similar hydrophilicity of the two layers is desired; otherwise, the formed bipolar membrane may be greatly curled and layer separated after being immersed in water.…”

Section: Y Wu Et Al / Desalination and Water Treatment 161 (2019) 1mentioning

confidence: 99%

“…The SQ membrane is prepared without the addition of intermediate layer or the hot-press procedure, which are often used in the preparation of other bipolar membranes [7,15]. The hot-press procedure is avoided due to the present casting method and the acid-base ionic bonds.…”

Section: Preparation Of the Bipolar Membranementioning

confidence: 99%

PPO/PVA hybrid membranes for application in bipolar membrane electrodialysis

Wu¹,

Gao²,

Zou³

et al. 2019

Desalination and Water Treatment

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The bipolar membrane electrodialysis (BMED) process requires three types of membranes: cation exchange, anion exchange and bipolar membranes. As commercial membranes are limited in performance, and have a relatively high cost, anion and cation exchange hybrid membranes were prepared in this study from poly(2,6-dimethyl-1,4-phenylene oxide) (PPO), polyvinyl alcohol (PVA) and two kinds of alkoxysilanes. The anion and cation exchange layers, containing-N + (CH 3) 3 OHand-SO 3 H groups, respectively, can be combined to prepare a bipolar membrane. These membranes were used in BMED process to regenerate CH 3 COOH and NaOH from the CH 3 COONa waste residue. The newly developed anion and cation exchange hybrid membranes are compact and homogeneous, having the water uptakes between 58.0% and 65.0%, an ion exchange capacity of 1.04-1.58 mmol g-1 and an area resistance of 0.73-1.55 Ω cm 2. The anion and cation exchange layers were combined as a bipolar membrane. This increases the membrane stability and area resistance (6.47 Ω cm 2). The bipolar membrane is intact without layer separation after immersion in 65°C water or NaOH solution (1-2 mol L-1). The PPO/PVA hybrid membranes can produce 0.25-0.43 mol L-1 CH 3 COOH/ NaOH during the BMED process. The energy consumption is 18.2-26.5 kWh kg-1 , and the current efficiency is 70%-72% after running 3 h at 20 mA cm-2 .

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Fundamental studies on a new series of SPSEBS‐PVA‐QPSEBS bipolar membrane: Membrane preparation and characterization

Cited by 12 publications

References 28 publications

Entanglement-Enhanced Water Dissociation in Bipolar Membranes with 3D Electrospun Junction and Polymeric Catalyst

Entanglement-Enhanced Water Dissociation in Bipolar Membranes with 3D Electrospun Junction and Polymeric Catalyst

Development of monopolar and platinum intermediate bipolar membranes: application in desalting brine solution

PPO/PVA hybrid membranes for application in bipolar membrane electrodialysis

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