Short side chain perfluorosulfonic acid membranes and their composites with nanosized zirconium phosphate: hydration, mechanical properties and proton conductivity

Pica, Monica; Donnadio, Anna; Casciola, Mario; Cojocaru, Paula; Merlo, Luca

doi:10.1039/c2jm34958b

Cited by 29 publications

(7 citation statements)

References 22 publications

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“…Zirconium phosphate enhances the mechanical properties of the membranes [31,39,40]. As shown in Table 1, by increasing zirconium phosphate insertion in the poly-…”

Section: Mechanical and Thermal Analysismentioning

confidence: 96%

“…Zirconium phosphate enhances the mechanical properties of the membranes [31,39,40]. As shown in Table 1, by increasing zirconium phosphate insertion in the polymeric structure, the mechanical tensile strength of the membranes was increased due to improving the compatibility of the membrane components as a result of enhancing the bonding between the polymers and zirconium phosphate, through ionic, hydrogen, and covalent bonds, which increased the interfacial adhesion in the membranes when compared to the membrane without doping.…”

Section: Mechanical and Thermal Analysismentioning

confidence: 99%

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Organic-Inorganic Novel Green Cation Exchange Membranes for Direct Methanol Fuel Cells

et al. 2021

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Commercializing direct methanol fuel cells (DMFC) demands cost-effective cation exchange membranes. Herein, a polymeric blend is prepared from low-cost and eco-friendly polymers (i.e., iota carrageenan (IC) and polyvinyl alcohol (PVA)). Zirconium phosphate (ZrPO4) was prepared from the impregnation–calcination method and characterized by energy dispersive X-ray analysis (EDX map), X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), and transmission electron microscopy (TEM), then incorporated as a bonding and doping agent into the polymer blend with different concentrations. The new fabricated membranes were characterized by SEM, FTIR, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and XRD. The results revealed that the membranes’ physicochemical properties (oxidative stability, tensile strength) are enhanced with increasing doping addition, and they realized higher results than Nafion 117 because of increasing numbers of hydrogen bonds fabricated between the polymers and zirconium phosphate. Additionally, the methanol permeability was decreased in the membranes with increasing zirconium phosphate content. The optimum membrane with IC/SPVA/ZrPO4-7.5 provided higher selectivity than Nafion 117. Therefore, it can be an effective cation exchange membrane for DMFCs applications.

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“…Zirconium phosphate enhances the mechanical properties of the membranes [31,39,40]. As shown in Table 1, by increasing zirconium phosphate insertion in the poly-…”

Section: Mechanical and Thermal Analysismentioning

confidence: 96%

Section: Mechanical and Thermal Analysismentioning

confidence: 99%

Organic-Inorganic Novel Green Cation Exchange Membranes for Direct Methanol Fuel Cells

et al. 2021

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“…Nevertheless, we can compare the proportional changes in the conductivity and mechanical properties of EW 700 Aquivion induced by the ZP bres with the corresponding proportional changes in the properties of EW 830 Aquivion due to ZP nanoparticles with a low aspect ratio. 26 The proportional increase in the Young's modulus of the composite membrane, with respect to the Young's modulus of the neat ionomer, is higher for the membranes lled with ZrP bres than for the corresponding membranes lled with ZP nanoparticles; as an example, the proportional increase in the Young's modulus for the composites lled with 5 wt% of ZP bres and nanoparticles is 40% and 27%, respectively, under ambient conditions. This effect becomes more signicant at higher temperature and relative humidity: at 70 C to 80% RH, the proportional increase in the Young's modulus for an EW 700 Aquivion membrane lled with 5 wt% ZP bres is 83%, while the corresponding increase for an EW 830 Aquivion membrane loaded with 5 wt% ZP nanoparticles is only 5%.…”

Section: Electrospinning Of Zrp/zro 2 Nanobresmentioning

confidence: 97%

Reactive coaxial electrospinning of ZrP/ZrO₂ nanofibres

et al. 2014

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“…An alternative approach to increasing an ionomer’s IEC by covalent attachment of additional charged groups is the addition of inorganic, proton-conducting materials such as sulfonated silica [ 11 , 12 , 13 , 14 , 15 , 16 , 17 ], zirconium phosphate [ 18 , 19 , 20 , 21 , 22 , 23 ] or a heteropolyacid [ 24 , 25 , 26 ]. Such hybridized (composite) membranes exhibit improved water retention and conductivity, and frequently, improved thermal and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Hybrid Perfluorosulfonic Acid/Sulfonated Silica Composite Membranes

2020

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Electrospinning was employed to fabricate composite membranes containing perfluorosulfonic acid (PFSA) ionomer, poly(vinylidene fluoride) (PVDF) reinforcement and a sulfonated silica network, where the latter was incorporated either in the PFSA matrix or in the PVDF fibers. The best membrane, in terms of proton conductivity, was made by incorporating the sulfonated silica network in PFSA fibers (Type-A) while the lowest conductivity membrane was obtained when sulfonated silica was incorporated into the reinforcing PVDF fibers (Type-B). A Type-A membrane containing 65 wt.% PFSA with an embedded sulfonated silica network (at 15 wt.%) and with 20 wt.% PVDF reinforcing fibers proved superior to the pristine PFSA membrane in terms of both the proton conductivity in the 30–90% RH at 80 °C (a 25–35% increase) and lateral swelling (a 68% reduction). In addition, it was demonstrated that a Type-A membrane was superior to that of a neat 660 EW perfluoroimide acid (PFIA, from 3M Co.) films with respect to swelling and mechanical strength, while having a similar proton conductivity vs. relative humidity profile. This study demonstrates that an electrospun nanofiber composite membrane with a sulfonated silica network added to moderately low EW PFSA fibers is a viable alternative to an ultra-low EW fluorinated ionomer PEM, in terms of properties relevant to fuel cell applications.

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Short side chain perfluorosulfonic acid membranes and their composites with nanosized zirconium phosphate: hydration, mechanical properties and proton conductivity

Cited by 29 publications

References 22 publications

Organic-Inorganic Novel Green Cation Exchange Membranes for Direct Methanol Fuel Cells

Organic-Inorganic Novel Green Cation Exchange Membranes for Direct Methanol Fuel Cells

Reactive coaxial electrospinning of ZrP/ZrO₂ nanofibres

Electrospun Hybrid Perfluorosulfonic Acid/Sulfonated Silica Composite Membranes

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Short side chain perfluorosulfonic acid membranes and their composites with nanosized zirconium phosphate: hydration, mechanical properties and proton conductivity

Cited by 29 publications

References 22 publications

Organic-Inorganic Novel Green Cation Exchange Membranes for Direct Methanol Fuel Cells

Organic-Inorganic Novel Green Cation Exchange Membranes for Direct Methanol Fuel Cells

Reactive coaxial electrospinning of ZrP/ZrO2 nanofibres

Electrospun Hybrid Perfluorosulfonic Acid/Sulfonated Silica Composite Membranes

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Product

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Reactive coaxial electrospinning of ZrP/ZrO₂ nanofibres