Anion exchange membranes based on semi-interpenetrating polymer network of quaternized chitosan and polystyrene

Wang, Jilin; He, Ronghuan; Che, Quantong

doi:10.1016/j.jcis.2011.05.039

Cited by 95 publications

(60 citation statements)

References 47 publications

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“…The CS/EMImC-Co-EP-OH -membranes at low content of EMImC-Co-EP (CS/EMImC-Co-EP = 1:0.5 by mass) showed the maximum tensile strength of 26.95 MPa and elongation at break of 8.84%, which is similar to CS-based membranes [37,38]. With increasing the content of EMImC-Co-EP in polymer, for example, with CS/EMImC-Co-EP ratio exceeding 1:0.75 by mass, the tensile strength of CS/EMImC-Co-EP-OH -membranes decreased to less than 2 MPa.…”

Section: Thermal Stability and Mechanical Propertiesmentioning

confidence: 69%

Novel Alkaline Anion-exchange Membranes Based on Chitosan/Ethenylmethylimidazoliumchloride Polymer with Ethenylpyrrolidone Composites for Low Temperature Polymer Electrolyte Fuel Cells

Song

Gao

et al. 2015

Electrochimica Acta

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Section: Thermal Stability and Mechanical Propertiesmentioning

confidence: 69%

Novel Alkaline Anion-exchange Membranes Based on Chitosan/Ethenylmethylimidazoliumchloride Polymer with Ethenylpyrrolidone Composites for Low Temperature Polymer Electrolyte Fuel Cells

Song

Gao

et al. 2015

Electrochimica Acta

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“…KOH aqueous solution was heated in a thermostat at certain temperatures from 20 °C to 60 °C, and poured in the cell. A low-concentration KOH was used since high-concentration KOH influences ionic conductivity at high temperatures [20,21]. The ion conductivity of the membrane (σ was calculated by Equation (2):…”

Section: Ionic Conductivitymentioning

confidence: 99%

Characterization of Anion Exchange Membrane Containing Epoxy Ring and C–Cl Bond Quaternized by Various Amine Groups for Application in Fuel Cells

et al. 2015

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Anion exchange membranes were synthesized from different compositions of glycidyl methacrylate (GMA) and vinylbenzyl chloride (VBC), with constant content of divinyl benzene (DVB) by radical polymerization using benzoyl peroxide (BPO) on non-woven polyethylene terephthalate (PET) substrate. Polymerized membranes were then quaternized by soaking in trimethylamine (TMA), triethylamine (TEA), tripropylamine (TPA), and 1,4-diazabicyclo [2.2.2] octane (DABCO). Characteristics of membranes were confirmed by Fourier transform infrared spectroscopy, water uptake, ion exchange capacity, ion conductivity, thermal, and alkaline stability. The results revealed that membranes quaternized by TPA and DABCO showed high affinity when GMA content was 15 wt% and 75 wt%, respectively. IEC and ion conductivity of membranes quaternized by TPA were 1.34 meq·g (at 60 °C), respectively. The results indicate that the membrane containing GMA 15 wt% quaternized by TPA showed the highest thermal stability among membranes and exhibited high ion conductivity compared to existing researches using GMA, VBC, and DVB monomers.

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“…[8][9][10][11] Among the various options available, SIPNs have gained relevance due to ease of fabrication, acceptable ionic conductivities, and excellent mechanical properties. [12][13][14] More specifically, poly(vinyl alcohol)/poly(diallyldimethylammonium chloride) (PVA/PDDA) SIPNs are promising membranes for applications in electrochemical energy systems mainly because PVA is a non-toxic, water soluble and crosslinkable polymer with excellent film-forming properties. 15,16 In addition, PDDA, which acts as a charge carrier, is also a water soluble and chemically stable polyelectrolyte that exhibits excellent OH − conductivity.…”

mentioning

confidence: 99%

Graphene Oxide–Polymer Nanocomposite Anion-Exchange Membranes

Movil

Frank

2015

J. Electrochem. Soc.

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Functionalized graphene oxide (FGO) was incorporated into polyvinyl alcohol/ poly(diallyldimethylammonium chloride) semiinterpenetrating polymer networks (PVA/PDA SIPNs) in order to create novel nanocomposite anion-exchange membranes (AEMs) with improved OH − conductivity and good thermo-mechanical stability at high relative humidity. The nanocomposites were fabricated by a solvent-casting method and subsequently thermally crosslinked to improve their mechanical stability in the hydrated state. The effects of PVA/PDDA ratio, cross-linking method, cross-linking temperature, and FGO content were studied in order to determine the optimal conditions to fabricate AEMs with improved material properties. The membranes were characterized by XRD, FTIR, TGA, FE-SEM, and impedance spectroscopy to assess the material properties of FGO and the nanocomposite membranes. The membranes were also evaluated as polymer electrolytes in anion exchange membrane fuel cells. The results reveal that the membrane fabricated at a PVA/PDDA weight ratio of 70/30 and 20 wt% FGO possesses the highest value of OH − conductivity (12.1 mS cm −1 @ 30 • C and 21 mS cm −1 @ 80 • C), as well as improved thermo-mechanical stability at 100% R.H. However, the fuel cell performance reaches a maximum using the membrane fabricated at 10 wt% FGO. Anion exchange membrane fuel cells (AEMFCs) have attracted considerable attention during the last few years due to some advantages that these kinds of systems offer compared to proton exchange membranes fuel cells (PEMFCs).1,2 For example, thanks to the facile kinetics for electrochemical charge transfer in alkaline environments, it is possible to use less expensive catalysts like nickel and silver in AEM-based fuel cells. 3 In terms of the fuel management, it is also possible to use concentrated fuels to operate these devices, because of the often reduced fuel crossover in AEMs. 4 Unfortunately, AEMFCs have some issues, specifically related to the polyelectrolyte performance. In general, AEMs have lower ionic conductivity than PEMs, mostly due to the fact that conductivity of OH − is intrinsically lower than H + . 5 Another concern with the use of AEMs is the degradation of their cationic groups in strong alkaline media. 6 In addition, AEMs usually exhibit poor solubility in low boiling point and inexpensive solvents, leading to less environmentallyfriendly fabrication processes with high costs and high degree of complexity. 7In order to overcome these limitations, a wide variety of membranes have been proposed during the last few decades as AEMs, including homopolymers, heterogeneous membranes and semi-interpenetrating polymer networks (SIPNs). [8][9][10][11] Among the various options available, SIPNs have gained relevance due to ease of fabrication, acceptable ionic conductivities, and excellent mechanical properties.12-14 More specifically, poly(vinyl alcohol)/poly(diallyldimethylammonium chloride) (PVA/PDDA) SIPNs are promising membranes for applications in electrochemical energy systems mainly because PVA is ...

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Anion exchange membranes based on semi-interpenetrating polymer network of quaternized chitosan and polystyrene

Cited by 95 publications

References 47 publications

Novel Alkaline Anion-exchange Membranes Based on Chitosan/Ethenylmethylimidazoliumchloride Polymer with Ethenylpyrrolidone Composites for Low Temperature Polymer Electrolyte Fuel Cells

Novel Alkaline Anion-exchange Membranes Based on Chitosan/Ethenylmethylimidazoliumchloride Polymer with Ethenylpyrrolidone Composites for Low Temperature Polymer Electrolyte Fuel Cells

Characterization of Anion Exchange Membrane Containing Epoxy Ring and C–Cl Bond Quaternized by Various Amine Groups for Application in Fuel Cells

Graphene Oxide–Polymer Nanocomposite Anion-Exchange Membranes

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