Proton-conducting membrane composed of sulfonated polystyrene microspheres, poly(vinylpyrrolidone) and poly(vinylidene fluoride)

Chen, Ningping; Hong, Liang

doi:10.1016/s0167-2738(01)01014-1

Cited by 66 publications

(37 citation statements)

References 11 publications

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“…PNVP was selected as a membrane material due to its strong polarity, which gives it good compatibility with other polymers while avoiding unstable morphologies that give rise to poor mechanical properties. Moreover, acid-base interactions between the amino group of PNVP and the sulfonic acid groups of sulfonated polymer, or other host polymers, can form ionically cross-linked ionomer networks able to lower methanol permeation and promote proton transfer [77][78][79]. Lu et al [80] reported the exceptional water or methanol sorption selectivity of PVA/PNVP blends that implied PNVP seemed to be a potential material for preparing PEM in DMFCs.…”

Section: Poly (Vinylpyrrolidone) (Pnvp)mentioning

confidence: 99%

“…There appears to be an optimum ratio of PSSA in the copolymer, as with over 40 wt% PSSA in the blend, the membrane became fragile, and thus no substantial increase in proton conductivity was gained. The optimal membranes show a proton conductivity range that is quite close to what Nafion With the aim of getting a finely dispersed and homogeneous blend membrane and to insure solid-state adhesion between the blend components, a third component, liner poly (vinylpyrrolidone) (PNVP), has been added to PSSA/PVDF blend membranes [78]. The PNVP polymer with oxygen-containing units is able to form Lewis acid-base pairs with PVDF and PSSA to improve blending compatibility.…”

Section: Blend Polyelectrolyte Complex Membranesmentioning

confidence: 99%

“…Introducing a third component in blended membranes was found to be an effective method for enhancing the interface between two poor compatibility phases. Proton conductivities, methanol permeabilities and mechanical properties were all improved by the addition of an appropriate third component such as PNVP [78] or block copolymer [101][102][103][104].…”

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confidence: 99%

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Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

2012

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Abstract:The relentless increase in the demand for useable power from energy-hungry economies continues to drive energy-material related research. Fuel cells, as a future potential power source that provide clean-at-the-point-of-use power offer many advantages such as high efficiency, high energy density, quiet operation, and environmental friendliness. Critical to the operation of the fuel cell is the proton exchange membrane (polymer electrolyte membrane) responsible for internal proton transport from the anode to the cathode. PEMs have the following requirements: high protonic conductivity, low electronic conductivity, impermeability to fuel gas or liquid, good mechanical toughness in both the dry and hydrated states, and high oxidative and hydrolytic stability in the actual fuel cell environment. Water soluble polymers represent an immensely diverse class of polymers. In this comprehensive review the initial focus is on those members of this group that have attracted publication interest, principally: chitosan, poly (ethylene glycol), poly (vinyl alcohol), poly (vinylpyrrolidone), poly (2-acrylamido-2-methyl-1-propanesulfonic acid) and poly (styrene sulfonic acid). The paper then considers in detail the relationship of structure to functionality in the context of polymer blends and polymer based networks together with the effects of membrane crosslinking on IPN and semi IPN architectures. This is followed by a review of pore-filling and other impregnation approaches. Throughout the paper detailed numerical results are given for comparison to today's state-of-the-art Nafion ® based materials.

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Section: Poly (Vinylpyrrolidone) (Pnvp)mentioning

confidence: 99%

Section: Blend Polyelectrolyte Complex Membranesmentioning

confidence: 99%

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Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

2012

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“…have been reported to exceed Nafion 1 in water uptake, thermal stability or proton conductivity. Sometimes further modifications on sulfonated polymers such as crosslinking, [15][16][17] surface grafting 18 and blending 12,[19][20][21] with heteropolyacids or other polymers are reported in literature to improve their properties of conductivity, mechanical stability or methanol resistance. A series of poly(phthalazinone ether sulfone ketone) copolymers, containing different ratios of diphenylsulfone and diphenylketone units, have high thermal stability (T g from 2848C to 3058C) besides outstanding physical and chemical properties.…”

Section: Introductionmentioning

confidence: 99%

Sulfonation of poly(phthalazinone ether sulfone ketone) by heterogeneous method and its potential application on proton exchange membrane (PEM)

et al. 2007

J of Applied Polymer Sci

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A series of sulfonated PPESK (SPPESKs) were synthesized through a heterogeneous sulfonation process with fuming sulfuric acid as sulfonating agent in a chloroform solvent. Membranes prepared from SPPESKs were investigated and proved to be candidates of proton exchange membrane in fuel cell operating at high temperature and low humidity. The heterogeneous sulfonation reaction is verified to first occur on the interface of the acid phase and the chloroform phase, then went on in the acid phase. SPPESKs with sulfonation degree (DS) up to 2.0 are obtained through a new reprecipitation method. Effects of reaction temperature, reaction time, acid/polymer ratio, and chloroform/polymer ratio on the sulfonation reaction are reported in details. An increase in sulfonation degree results in the increase of hydrophilicity, bringing about a substantial gain in proton conductivity. SPPESK membranes exhibit high water uptake of about 105.4% with DS of 1.01, almost two times higher than that of Nafion 1 with similar dimensional variation. Conductivity values at 358C, 60% R.H. ranging from 10 À3 to 10 À2 S/cm were measured, which are comparable to or higher than that of Nafion 1 112 (1.635 Â 10 À2 S/cm) under the same test condition. Thermogravimetric analysis shows that SPPESK membranes are stable up to 2908C in N 2 .

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“…Similar polymer membranes were synthesized from sulfonated polystyrene microspheres, poly(vinyl pyrrolidone), and poly(vinylidene fluoride). 17 The polymers should have chemical stabilities such as high-resistance to oxidation, reduction, and hydrolysis to use as fuel cell polymer electrolytes. 1 Taking the reported results into consideration, the sulfonated fluoro-poly(arylene ether)s obtained from polycondensation with perfluoro-aromatic compound will be expected to have good properties as a polymer electrolyte membrane.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of sulfonated aromatic fluoro‐polymers

Endo

Yamade

2010

J of Applied Polymer Sci

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Polycondensation of perfluorobiphenyl with a,a-bis(4-hydroxyphenyl)ethylbenzene and/or 9,9-bis(4-hydroxyphenyl)fluorene was investigated. The polycondensation of perfluorobiphenyl with a,a-bis(4-hydroxyphenyl) ethylbenzene and/or 9,9-bis(4-hydroxyphenyl)fluorene proceeded at low-temperature to a give high-molecular weight and thermal stable polymers. The 19 F-NMR spectra of the polymers indicate that the polymers consists of predominantly 1,4-phenylene structure with respect to the perfluoroaromatic compound. The sulfonation of the polymers obtained from the polycondensation occurred at the phenyl groups and fluorenyl side chain. A tough and smooth film was prepared by a casting method from DMF solution of the sulfonated polymer. The films showed hydrolytic and oxidative stabilities, and a high-proton conductivity.

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Proton-conducting membrane composed of sulfonated polystyrene microspheres, poly(vinylpyrrolidone) and poly(vinylidene fluoride)

Cited by 66 publications

References 11 publications

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

Water Soluble Polymers as Proton Exchange Membranes for Fuel Cells

Sulfonation of poly(phthalazinone ether sulfone ketone) by heterogeneous method and its potential application on proton exchange membrane (PEM)

Synthesis and properties of sulfonated aromatic fluoro‐polymers

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