A novel composite membranes based on sulfonated montmorillonite modified Nafion® for DMFCs

Lin, Yuping; Yen, Ching Yu; Hung, Chih‐Hung; Hsiao, Yi-Hsiu; Chen‐Chi, M.

doi:10.1016/j.jpowsour.2007.02.079

Cited by 64 publications

(42 citation statements)

References 18 publications

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“…The FR-IR spectra of Na 1 -MMT and CTAB-MMT (in KBr pellets) were recorded in the wave number ranging from 500 to 4000 cm 21 . XRD measurements were carried out using a D/MAX-2400 with Cu Ka radiation.…”

Section: Physical Characterizationmentioning

confidence: 99%

“…Membrane stripes of 1 3 5 cm 2 were prepared for the mechanical property test. Tensile strength and tensile strain at break (elongation-tobreak) of the membrane were measured by using a SANS CMT8102 stretching tester at the speed of 20 mm min 21 .…”

Section: Physical Characterizationmentioning

confidence: 99%

“…The IR spectra of the untreated MMT (Na 1 -MMT) and the CTAB-treated MMT (CTAB-MMT) are shown in Figure 1. Before treatment, the Na 1 -MMT spectrum shows strong IR absorptions at 4002600 cm 21 (AlAO stretching), 1038-1090 cm 21 (SiAO stretching), and around 3435 and 3628 cm 21 (OAH stretching in hydrogen-bond water and free water, respectively). 36 After CTAB treatment, the CTAB-MMT spectrum shows a pair of new peaks at 2851 and 2926 cm 21 , which are ascribed to the symmetrical and asymmetrical CAH stretching from CTAB molecules.…”

Section: Preparation Of Sppesk-mmt Nanocompositesmentioning

confidence: 99%

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Montmorillonite‐reinforced sulfonated poly(phthalazinone ether sulfone ketone) nanocomposite proton exchange membranes for direct methanol fuel cells

et al. 2013

J of Applied Polymer Sci

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To produce a composite membrane with high conductivity and low permeability, SPPESK with a degree of sulfonation of 101% was carefully selected for the preparation of montmorillonite (MMT)-reinforced SPPESK using solution intercalation. The fundamental characteristics such as water uptake, swelling ratio, proton conductivity, methanol permeability, and mechanical properties of the composite membranes were studied. Water uptake is improved when organic MMT (OMMT) loading increase. The composite membranes with CTAB-MMT loading of 4-0.5% show 0.143-0.150 S cm 21 proton conductivity at 80 C, which approaches the value of Nafion112. In addition, methanol permeability was decreased to 6.29 3 10 28 cm 2 s 21 by the addition of 6 wt % OMMT. As a result, the SPPESK-MMT composite membrane is a good candidate for use in direct methanol fuel cells.

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Section: Physical Characterizationmentioning

confidence: 99%

Section: Physical Characterizationmentioning

confidence: 99%

Section: Preparation Of Sppesk-mmt Nanocompositesmentioning

confidence: 99%

See 1 more Smart Citation

Montmorillonite‐reinforced sulfonated poly(phthalazinone ether sulfone ketone) nanocomposite proton exchange membranes for direct methanol fuel cells

et al. 2013

J of Applied Polymer Sci

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“…Another strategy consists in incorporating inorganic fillers such as metal oxides [13,14,15,16,17,18,19,20,21], acids [22,23,24,25,26], phosphates or phosphonates [27,28,29] into the Nafion® matrix to make the composite or hybrid membrane more mechanically stable, less permeable to reactant and more hygroscopic. Different clays, montmorillonite [30,31,32] or laponite [33] for instance, have also been evaluated as possible fillers. Palygorskite and sepiolite are fibrous clays known to be very hygroscopic and whose acicular morphology may help to make composite membranes more mechanically resistant.…”

Section: Introductionmentioning

confidence: 99%

Nafion®–sepiolite composite membranes for improved proton exchange membrane fuel cell performance

Beauger

Lainé

Burr

et al. 2013

Journal of Membrane Science

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“…Several papers describe the synthesis and characterization of Nafion membranes based on sulfonated [23][24][25][26][27][28], fluoro-modified [29,30] conventional organo-modified [31][32][33] or native clays [33]. Other approaches for synthesizing Nafionclay hybrids have also been reported [34,35].…”

Section: Introductionmentioning

confidence: 99%

Nafion–clay nanocomposite membranes: Morphology and properties

Alonso

Estevez

Lian

et al. 2009

Polymer

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A series of Nafion-clay nanocomposite membranes were synthesized and characterized. To minimize any adverse effects on ionic conductivity the clay nanoparticles were H + exchanged prior to mixing with Nafion. Well-dispersed, mechanically robust, freestanding nanocomposite membranes were prepared by casting from a water suspension at 180°C under pressure. SAXS profiles reveal a preferential orientation of Nafion aggregates parallel to the membrane surface, or normal plane. This preferred orientation is induced by the platy nature of the clay nanoparticles, which tend to align parallel to the surface of the membrane. The nanocomposite membranes show dramatically reduced methanol permeability, while maintaining high levels of proton conductivity.The hybrid films are much stiffer and can withstand much higher temperatures compared to pure Nafion. The superior thermomechanical, electrochemical and barrier properties of the nanocomposite membranes are of significant interest for direct methanol fuel cell applications.2

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A novel composite membranes based on sulfonated montmorillonite modified Nafion® for DMFCs

Cited by 64 publications

References 18 publications

Montmorillonite‐reinforced sulfonated poly(phthalazinone ether sulfone ketone) nanocomposite proton exchange membranes for direct methanol fuel cells

Montmorillonite‐reinforced sulfonated poly(phthalazinone ether sulfone ketone) nanocomposite proton exchange membranes for direct methanol fuel cells

Nafion®–sepiolite composite membranes for improved proton exchange membrane fuel cell performance

Nafion–clay nanocomposite membranes: Morphology and properties

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