Preparation of proton selective membranes through constructing H+ transfer channels by acid–base pairs

Ge, Liang; Liu, Xiaohe; Wang, Guanhua; Wu, Bin; Wu, Liang; Bakangura, Erigene; Xu, Tongwen

doi:10.1016/j.memsci.2014.10.039

Cited by 60 publications

(31 citation statements)

References 30 publications

(22 reference statements)

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“…With the increase in PVI, compact hydrogen bonds were formed in the membrane, thereby blocking Zn 2+ leakage. On the contrary, electrostatic interaction between sulfonic acid with imidazole groups resulted in significant H + ion flux via the formation of acid-base pairs in the membranes [68].…”

Section: Bulk Modificationmentioning

confidence: 97%

“…Polymer blends can introduce specific complex-forming groups into the membrane, allowing adjustment of the final ionic flux and permselectivity of the membrane [66]. Ge et al introduced acidic sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) (SPPO-H) and basic 1-vinylimidazole (VI) monomer interactions into IEM to prepare the H + selective membrane [68]. The poly(vinyl imidazole) (PVI)-SPPO network in the IEM was formed by polymerizing vinyl imidazole monomers in sulfonated PPO (SPPO) solution with PVI.…”

Section: Bulk Modificationmentioning

confidence: 99%

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Design of Monovalent Ion Selective Membranes for Reducing the Impacts of Multivalent Ions in Reverse Electrodialysis

et al. 2019

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Reverse electrodialysis (RED) represents one of the most promising membrane-based technologies for clean and renewable energy production from mixing water solutions. However, the presence of multivalent ions in natural water drastically reduces system performance, in particular, the open-circuit voltage (OCV) and the output power. This effect is largely described by the “uphill transport” phenomenon, in which multivalent ions are transported against the concentration gradient. In this work, recent advances in the investigation of the impact of multivalent ions on power generation by RED are systematically reviewed along with possible strategies to overcome this challenge. In particular, the use of monovalent ion-selective membranes represents a promising alternative to reduce the negative impact of multivalent ions given the availability of low-cost materials and an easy route of membrane synthesis. A thorough assessment of the materials and methodologies used to prepare monovalent selective ion exchange membranes (both cation and anion exchange membranes) for applications in (reverse) electrodialysis is performed. Moreover, transport mechanisms under conditions of extreme salinity gradient are analyzed and compared for a better understanding of the design criteria. The ultimate goal of the present work is to propose a prospective research direction on the development of new membrane materials for effective implementation of RED under natural feed conditions.

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Section: Bulk Modificationmentioning

confidence: 97%

Section: Bulk Modificationmentioning

confidence: 99%

Design of Monovalent Ion Selective Membranes for Reducing the Impacts of Multivalent Ions in Reverse Electrodialysis

et al. 2019

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“…7 To characterize the membrane pore size and to test the feasibility of membrane use in a VFB system, the H + and VO 2+ ion permeation behaviors were investigated and the diffusivities of H + and VO 2+ are shown in Fig. 8 5 ] 2+ in aqueous solutions at moderately low pH and the radius of the hydrated ions is approximately 0.5-1 nm [32,33], while the radius of hydrogen ions is only 0.28 nm [34]. Although the pore size measured from BET adsorption seems too big to reject vanadium ion, the diffusion results indicate difference from the theoretical estimation.…”

Section: Effect Of Crystallization Time On Membrane Morphology and Prmentioning

confidence: 99%

Synthesis of nanoporous PVDF membranes by controllable crystallization for selective proton permeation

Wang

Liu

et al. 2016

Journal of Membrane Science

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“…The formation of acid-base pairs determines the transport and mechanical properties of the membranes, in which imidazole derivatives are used as the base and sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) [23], sulfonated poly(ether sulfone) [24], or sulfonated poly(fluorenyl ether sulfone) [25] act as the acid polymer. It is noted here that the heterocycle provides better thermal stability, while the increase in the proton conductivity of mixed membranes can be associated with the formation of wider hydrophilic channels induced by the inclusion of the bulky imidazole groups into the ion channel.…”

Section: Introductionmentioning

confidence: 99%

Sodium p-Styrene Sulfonate–1-Vinylimidazole Copolymers for Acid–Base Proton-Exchange Membranes

Лебедева

Pozhidaev

Малахова

et al. 2020

Membr. Membr. Technol.

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Binary copolymers possessing thermal stability up to 290°C and suitable for the formation of ionexchange membranes have been obtained by free radical copolymerization of sodium p-styrene sulfonate and 1-vinylimidazole with subsequent conversion to the H-form. The composition and structure of the copolymers are confirmed by elemental analysis and IR and NMR spectroscopy. Multicomponent membranes based on the copolymers of sodium p-styrene sulfonate and 1-vinylimidazole have been obtained using poly(vinyl alcohol) crosslinked by oxalic acid as a film-forming agent. It is shown by scanning electron microscopy that the surface and cut of the membranes have a uniform structure. The specific electric conductivity of the membranes with different concentrations of styrene sulfonic acid (20 to 80 mol % in the copolymer) increases with an increase in the fraction of styrene sulfonic acid and is 29.5 to 52.0 mS cm −1 at 80°C. The activation energy of proton transport of the membranes is 12.5 to 15.5 kJ mol −1. The water uptake of the membranes decreases with the increase in the concentration of the basic (imidazole) component in them, which may be associated with the increase in the density of ionic crosslinking due to the acid-base interaction of the sulfo groups and pyridine nitrogen atoms of the imidazole cycle. The formation of acid-base pairs results in the formation of continuous proton transport channels in addition to the sulfonic acid channels, which is confirmed by the high values of specific electric conductivity even in the case of a decrease in the concentration of sulfostyrene in the composition of the membrane. Increasing the concentration of 1-vinylimidazole in the composition of the copolymer from 20 to 80 mol % leads to an increase in the relative elongation at break from 3 to 6%, an increase in the tensile strength at break from 4 to 7 MPa, a decrease in the Young modulus of the membranes from 127 to 102 MPa, and a decrease in the water uptake from 45 to 15.

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Preparation of proton selective membranes through constructing H+ transfer channels by acid–base pairs

Cited by 60 publications

References 30 publications

Design of Monovalent Ion Selective Membranes for Reducing the Impacts of Multivalent Ions in Reverse Electrodialysis

Design of Monovalent Ion Selective Membranes for Reducing the Impacts of Multivalent Ions in Reverse Electrodialysis

Synthesis of nanoporous PVDF membranes by controllable crystallization for selective proton permeation

Sodium p-Styrene Sulfonate–1-Vinylimidazole Copolymers for Acid–Base Proton-Exchange Membranes

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