New cation-exchange membranes based on cross-linked sulfonated polystyrene and polyethylene for power generation systems

Safronova, E. Yu.; Голубенко, Д. В.; Shevlyakova, N. V.; D’yakova, M. G.; Тверской, В. А.; Dammak, L.; Grande, Daniel; Yaroslavtsev, A. B.

doi:10.1016/j.memsci.2016.05.006

Cited by 91 publications

(40 citation statements)

References 39 publications

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“…Cation and anion exchange membranes were treated as identical linearly elastic, homogeneous, and isotropic media. The values reported in Table 1 for the membranes' Young modulus (E) and Poisson ratio (ν) are intermediate among literature data for ion exchange membranes, which range broadly from 10 to 1000 MPa for E and from 0.25 to 0.4 for ν [21][22][23][24][25][26]. The linearly elastic hypothesis is acceptable under the moderate load conditions considered here: for TMP = ±0.4 bar, the maximum computed von Mises stress is ∼2 MPa, below the limiting stress for a linearly elastic behavior as indicated by uniaxial tensile tests (see the Supplementary Material in Reference [20]).…”

Section: Mechanical Modelmentioning

confidence: 49%

Pressure-Induced Deformation of Pillar-Type Profiled Membranes and Its Effects on Flow and Mass Transfer

et al. 2019

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In electro-membrane processes, a pressure difference may arise between solutions flowing in alternate channels. This transmembrane pressure (TMP) causes a deformation of the membranes and of the fluid compartments. This, in turn, affects pressure losses and mass transfer rates with respect to undeformed conditions and may result in uneven flow rate and mass flux distributions. These phenomena were analyzed here for round pillar-type profiled membranes by integrated mechanical and fluid dynamics simulations. The analysis involved three steps: (1) A conservatively large value of TMP was imposed, and mechanical simulations were performed to identify the geometry with the minimum pillar density still able to withstand this TMP without collapsing (i.e., without exhibiting contacts between opposite membranes); (2) the geometry thus identified was subject to expansion and compression conditions in a TMP interval including the values expected in practical applications, and for each TMP, the corresponding deformed configuration was predicted; and (3) for each computed deformed configuration, flow and mass transfer were predicted by computational fluid dynamics. Membrane deformation was found to have important effects; friction and mass transfer coefficients generally increased in compressed channels and decreased in expanded channels, while a more complex behavior was obtained for mass transfer coefficients.

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Section: Mechanical Modelmentioning

confidence: 49%

Pressure-Induced Deformation of Pillar-Type Profiled Membranes and Its Effects on Flow and Mass Transfer

et al. 2019

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“…The obtained anion‐exchange membranes are 60–100 μm thick films with a pseudo‐homogeneous structure: no phase separation of the polystyrene and polymethylpentene phases is observed in the electron micrographs [Figure (a)]. According to the microprobe analysis of the cross section [Figure (b)], the surface of the membranes is enriched in polystyrene, since the grafting reaction starts from the surface . The membrane preserves the appearance of the pristine polymethylpentene film [Figure (c)].…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, graft polymerization makes it possible to obtain materials with the same composition and no secondary porosity . The backbone film is typically activated by a high‐energy radiation source: gamma rays, electron and heavy‐ion beams.…”

Section: Introductionmentioning

confidence: 99%

Novel anion exchange membrane with low ionic resistance based on chloromethylated/quaternized‐grafted polystyrene for energy efficient electromembrane processes

Голубенко

Bruggen

Yaroslavtsev

2019

J of Applied Polymer Sci

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A novel anion-exchange membrane has been manufactured by chloromethylation and subsequent quaternization of polystyrene within a graft copolymer films based on UV-oxidized polymethylpentene. Particular attention is given to the kinetics of chloromethylation and the influence of the reaction conditions on the properties of the anion-exchange membranes. By means of variation of the polystyrene content and its crosslinking degree we have obtained membranes that have an ion-exchange capacity from 1.1 to 2.9 mmole g −1 , anion transport numbers between 91.0 and 95.5% and specific ionic conductivities (σ 25Cl − Þ ranging from 2 to 25 mS cm −1 . The developed membranes due to their low thickness and high conductivities have a remarkably low surface ionic resistance of around 0.6 Ω cm 2 . It was calculated that the use of the developed materials will increase the efficiency of reverse electrodialysis energy production by 8-10% compared to the state of the art membranes.

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“…Membranes prepared by this technique have wide applications in proton exchange membrane fuel cells, 4 secondary batteries, 5,6 and treatment of wastewater.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis and properties of a cation exchange membrane with bifunctional groups prepared by pre-irradiation graft copolymerization

Tang

et al. 2018

RSC Adv.

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A new type of a cation exchange membrane named ETFE-g-poly(AA-co-SSS) with bifunctional groups was synthesized by a one-step method. Its preparation by an electron beam-induced pre-irradiation grafting method and the effects of reaction temperature, monomer concentration, pH value of the grafting solution, storage time and temperature of the irradiated poly(ethylene-alt-tetrafluoroethylene) (ETFE) films on the grafting yield were studied. A total concentration of 2 mol L À1 of monomers was found to be beneficial for acrylic acid (AA) and sodium styrene sulfonate (SSS) co-grafting onto the ETFE films.Infrared spectroscopic analysis of the grafted membrane confirmed the existence of sulfonate and carboxylic acid groups. The contact angle of the grafted membrane decreased from 94.3 to 46.7 with the increase in grafting yield. The higher the grafting yield, the faster the response and recovery rate with respect to humidity. AFM images showed that the diameter of the grafted chains on the surface of ETFE membranes was about 30 nm. The voltage of the grafted membrane was stable after 100 cycles of charge-discharge; thus, the prepared membranes have great potentials to be used as separators in secondary batteries.

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New cation-exchange membranes based on cross-linked sulfonated polystyrene and polyethylene for power generation systems

Cited by 91 publications

References 39 publications

Pressure-Induced Deformation of Pillar-Type Profiled Membranes and Its Effects on Flow and Mass Transfer

Pressure-Induced Deformation of Pillar-Type Profiled Membranes and Its Effects on Flow and Mass Transfer

Novel anion exchange membrane with low ionic resistance based on chloromethylated/quaternized‐grafted polystyrene for energy efficient electromembrane processes

Facile synthesis and properties of a cation exchange membrane with bifunctional groups prepared by pre-irradiation graft copolymerization

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