Developing thin film heterogeneous ion exchange membrane modified by 2-acrylamido-2-methylpropanesulfonic acid hydrogel-co-super activated carbon nanoparticles coating layer

Nemati, Mehdi; Hosseini, Sayed Mohsen; Shabanian, Meisam

doi:10.1007/s11814-017-0049-6

Cited by 15 publications

(4 citation statements)

References 49 publications

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“…There were nonsignificant changes in the aged CEMs, which was different from the case for the aged AEMs. As shown in the FTIR spectra of CEMs (see the Supporting Information, Figure S9), the bands at 1175 and 1040 cm –1 belonged to the characteristic peaks of −SO 3 H groups and SO stretching, respectively. , These characteristic peaks remained unchanged after aging in NaOH solution, indicating the high chemical stability of the CEMs. Accordingly, the IEC, membrane electrical resistance, and contact angle remained stable (see the Supporting Information, Table S4).…”

Section: Resultsmentioning

confidence: 99%

Effects of Alkaline Cleaning on the Conversion and Transformation of Functional Groups on Ion-Exchange Membranes in Polymer-Flooding Wastewater Treatment: Desalination Performance, Fouling Behavior, and Mechanism

Xia

Qiu

et al. 2019

Environ. Sci. Technol.

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The aging effects of sodium hydroxide (NaOH) on ion-exchange membranes were systematically studied, including the membrane properties, desalination performance, and fouling behaviors. After aging in NaOH solution, there were minor changes in the cation-exchange membrane (CEM) properties; however, functional groups (i.e., quaternary amines) on the anion-exchange membranes (AEMs) were converted into benzylic alcohol, alkene, and tertiary amines, respectively, by nucleophilic substitution, Hofmann elimination, and ylide formation. These degradations rendered decreased ionexchange capacity (IEC), increased electrical resistance, lost hydrophilicity, and weakened mechanical strength. Moreover, severe deteriorations of desalination performance were observed due to the little ion-exchange ability of the degraded AEMs. The desalination rates were restored after cultivating the aged AEMs in acid solution, mainly because the tertiary amines transformed from the hydroxide form (OH-form) to the ionic chlorine form (Cl-form). The restored desalination rates indicated that the main degradation products were tertiary amines. In addition, the antifouling performance decreased in the order of aged OH-form > aged Cl-form > original AEMs due to the reduction of foulant−membrane intermolecular interactions after aging in NaOH solution. The results contribute to establishing a more comprehensive understanding of the effects of alkaline cleaning on IEMs and provide new insights into cleaning-process optimization and membrane modification.

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Section: Resultsmentioning

confidence: 99%

Effects of Alkaline Cleaning on the Conversion and Transformation of Functional Groups on Ion-Exchange Membranes in Polymer-Flooding Wastewater Treatment: Desalination Performance, Fouling Behavior, and Mechanism

Xia

Qiu

et al. 2019

Environ. Sci. Technol.

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“…For each of the HCM geometries, a certain set of fabrication methods has been used (see Scheme ). Active layers were typically fabricated through casting, ,,,, electrospinning, spin coating, concentration–polarization, interfacial polymerization (IP), ,,, photografting, or NIPS. ,, On the other hand, pore-filled membranes have been prepared by track etching, ,, or by immersion in precursor solution, followed by polymerization through UV irradiation ,,, or heat . Lastly, draw solutes can be made by hydrogel bulk synthesis procedures, such as radical polymerization ,,, or emulsion polymerization .…”

Section: Advances In Membrane Dewateringmentioning

confidence: 99%

“…For each of the HCM geometries, a certain set of fabrication methods has been used (see Scheme 1 ). Active layers were typically fabricated through casting, 199 , 212 , 214 , 226 , 298 electrospinning, 218 spin coating, 220 concentration–polarization, 221 interfacial polymerization (IP), 201 , 225 , 227 , 229 photografting, 222 or NIPS. 217 , 230 , 231 On the other hand, pore-filled membranes have been prepared by track etching, 224 , 235 , 239 or by immersion in precursor solution, followed by polymerization through UV irradiation 232 , 233 , 237 , 299 or heat.…”

Section: Advances In Membrane Dewateringmentioning

confidence: 99%

Advances in Membrane Separation for Biomaterial Dewatering

Diepenbroek,

Mehta,

Borneman

et al. 2024

Langmuir

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Biomaterials often contain large quantities of water (50−98%), and with the current transition to a more biobased economy, drying these materials will become increasingly important. Contrary to the standard, thermodynamically inefficient chemical and thermal drying methods, dewatering by membrane separation will provide a sustainable and efficient alternative. However, biomaterials can easily foul membrane surfaces, which is detrimental to the performance of current membrane separations. Improving the antifouling properties of such membranes is a key challenge. Other recent research has been dedicated to enhancing the permeate flux and selectivity. In this review, we present a comprehensive overview of the design requirements for and recent advances in dewatering of biomaterials using membranes. These recent developments offer a viable solution to the challenges of fouling and suboptimal performances. We focus on two emerging development strategies, which are the use of electric-field-assisted dewatering and surface functionalizations, in particular with hydrogels. Our overview concludes with a critical mention of the remaining challenges and possible research directions within these subfields.

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“…Meanwhile, ion-exchange membranes (IEMs) are key materials that determine the performance of electro-membrane processes such as CEDI [4][5][6][7], electrodialysis [4,[8][9][10], reverse electrodialysis [11][12][13][14], Donnan dialysis [5,15], and fuel cells [5,13]. IEMs can be classified into anion-exchange membranes (AEMs), cation-exchange membranes (CEMs), and bipolar membranes (BPMs) depending on the types of fixed ion groups they contain [16,17].…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Anion-Exchange Membranes with Enhanced Ion Conductivity for Continuous Electrodeionization

Lee,

Kang

2023

Membranes

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In this study, the optimal fabrication parameters of a heterogeneous anion-exchange membrane (AEM) using an ionomer binder are investigated to improve the performance of continuous electrodeionization (CEDI) for producing ultrapure water. Poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) is selected as the base material for preparing the ionomer binder and quaternized to have various ion exchange capacities (IECs). The optimal content of ion-exchange resin (IER) powder according to the IEC of the ionomer binder is then determined through systematic analyses. In conclusion, it is revealed that a heterogeneous AEM with optimal performance can be fabricated when the IEC of the ionomer binder is lowered and the content of IER powder is also lower than that of conventional heterogeneous membranes. Moreover, crosslinked quaternized PPO (QPPO) nanofiber powder is used as an additive to improve ion conductivity without deteriorating the mechanical properties of the membrane. The membrane fabricated under optimal conditions exhibits significantly lower electrical resistance (4.6 Ω cm2) despite a low IER content (30 wt%) compared to the commercial membrane (IONAC MA-3475, 13.6 Ω cm2) while also demonstrating moderate tensile strength (9.7 MPa) and a high transport number (ca. 0.97). Furthermore, it is proven that the prepared membrane exhibits a superior ion removal rate (99.86%) and lower energy consumption (0.35 kWh) compared to the commercial membrane (99.76% and 0.4 kWh, respectively) in CEDI experiments.

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Developing thin film heterogeneous ion exchange membrane modified by 2-acrylamido-2-methylpropanesulfonic acid hydrogel-co-super activated carbon nanoparticles coating layer

Cited by 15 publications

References 49 publications

Effects of Alkaline Cleaning on the Conversion and Transformation of Functional Groups on Ion-Exchange Membranes in Polymer-Flooding Wastewater Treatment: Desalination Performance, Fouling Behavior, and Mechanism

Effects of Alkaline Cleaning on the Conversion and Transformation of Functional Groups on Ion-Exchange Membranes in Polymer-Flooding Wastewater Treatment: Desalination Performance, Fouling Behavior, and Mechanism

Advances in Membrane Separation for Biomaterial Dewatering

Heterogeneous Anion-Exchange Membranes with Enhanced Ion Conductivity for Continuous Electrodeionization

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