Single-step radiation induced grafting for preparation of proton exchange membranes for fuel cell

Nasef, Mohamed Mahmoud; Saidi, Hamdani; Dahlan, Khairul Zaman Mohd

doi:10.1016/j.memsci.2009.04.037

Cited by 51 publications

(22 citation statements)

References 17 publications

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“…These results suggest that, % of 4-VP onto PVDF films not only depends on the diffusivity of 4-VP into the polymer matrix and its concentration in the grafting layers but also on the amount of active cites created within the polymer matrix. Similar behaviour was observed upon grafting of other monomers such as styrene and sodium styrene sulfonate onto PVDF films [7,30]. Figure 3 shows the variation of % for grafting of 4-VP onto PVDF film with the reaction time.…”

Section: Effect Of Monomer Concentrationsupporting

confidence: 67%

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Parametric investigations on proton conducting membrane by radiation induced grafting of 4-vinylpyridine onto poly(vinylidene fluoride) and phosphoric acid doping

Shamsaei

Nasef²,

Saidi

et al. 2014

Radiochimica Acta

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Proton conducting membrane composed of grafted basic moiety doped with phosphoric acid (PA) was studied. The membrane denoted as PVDF-g-4-VP/PA was prepared by radiation induced grafting of 4-vinylpyridine (4-VP) onto poly(vinylidene fluoride) (PVDF) films followed by doping with PA. The effect of grafting conditions on the degree of grafting ( %) was investigated. The acid doping conditions ( %, time and PA concentration) were also investigated with respect to doping level. The grafted precursors and the acid doped membranes were characterized by means of Fourier transform infrared (FTIR), X-ray diffractometry (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and field emission scanning electron microscopy (FESEM). The membranes showed a thermal stability up to a temperature of ∼ 160 ∘ C, above which they undergo a multi-step degradation pattern due to decomposition of the protonated functions, poly(4VP) grafts and PVDF matrix, respectively. The proton conductivities of the membranes were found to increase with the increase in % ( doping level) and the temperature with a maximum proton conductivity of 62 mS cm −1 achieved at 100 ∘ C without any humidification. The results of the present study show that the prepared membrane has a potential to be proposed for operating polymer electrolyte membrane fuel cell above 80 ∘ C.

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Section: Effect Of Monomer Concentrationsupporting

confidence: 67%

“…This was encouraged by simplicity of preparation techniques and the strong potential of the obtained membranes for application in PEMFC [6][7][8]. However, very limited research efforts have been exerted on the preparation of PEMs by radiation induced grafting (RIG) for the application in PEMFC operating at high temperature [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Parametric investigations on proton conducting membrane by radiation induced grafting of 4-vinylpyridine onto poly(vinylidene fluoride) and phosphoric acid doping

Shamsaei

Nasef²,

Saidi

et al. 2014

Radiochimica Acta

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“…In one of the earlier studies, SSS was grafted onto high-density polyethylene (HDPE) by radiation-induced grafting with relatively low graft levels due to the incompatibility between the ionized hydrophilic sulfonic acid groups and the hydrophobic polymer backbone [146]. AAc was employed as a co-monomer together with SSS in order to promote the grafting reaction onto HDPE and FEP [147,148]. It was reported that initial grafting of the AAc introduced hydrophilic properties onto the hydrophobic polymer surface, facilitating further grafting of the SSS.…”

Section: Single-step Radiation-induced Graftingmentioning

confidence: 99%

“…A c c e p t e d M a n u s c r i p t 33 Nasef et al [148,149] reported the first successful attempt in literature on radiationinduced grafting of SSS onto a fluorinated base polymer, PVDF. The obtained protonexchange membranes exhibited promising fuel cell relevant properties including water uptake, IEC and ionic conductivity.…”

Section: Single-step Radiation-induced Graftingmentioning

confidence: 99%

Radiation-grafted materials for energy conversion and energy storage applications

Nasef

Gürsel

Karabelli

et al. 2016

Progress in Polymer Science

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“…In a previous communication, we briefly reported for the first time on the preparation of proton‐exchange membranes, i.e. poly(vinylidene fluoride)‐ graft ‐poly(styrene sulfonic acid) (PVDF‐ g ‐PSSA), by grafting of SSS onto electron‐irradiated poly(vinylidene fluoride) (PVDF) films without adding acrylic acid monomer 24. The proposed method was initially found to have a strong potential to boost grafting to levels suitable for fuel cell applications.…”

Section: Introductionmentioning

confidence: 99%

Comparative investigations of radiation‐grafted proton‐exchange membranes prepared using single‐step and conventional two‐step radiation‐induced grafting methods

Nasef

Saidi

Dahlan

2010

Polymer International

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Proton‐exchange membranes containing poly(styrene sulfonic acid) grafts hosted in poly(vinylidene fluoride) (PVDF) films were prepared using two radiation‐induced grafting methods: a single‐step grafting method (SSGM) involving grafting of sodium styrene sulfonate onto electron beam (EB)‐irradiated PVDF films and a conventional two‐step grafting method (CTSGM) in which styrene monomer is grafted onto EB‐irradiated PVDF films and subsequently sulfonated. Differential scanning calorimetry, universal mechanical testing and scanning transmission electron microscopy were used to evaluate the thermal, mechanical and structural changes developed in the membranes during the preparation procedures. Physicochemical properties such as water uptake, hydration number and ionic conductivity were studied as functions of ion‐exchange capacity and the results obtained were correlated with the structural changes accompanying each preparation method. Membranes obtained using the SSGM were found to have superior properties compared to their counterparts prepared using the CTSGM suggesting the former method is more effective than the latter for imparting desired functionality and stability properties to the membranes. Copyright © 2010 Society of Chemical Industry

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Single-step radiation induced grafting for preparation of proton exchange membranes for fuel cell

Cited by 51 publications

References 17 publications

Parametric investigations on proton conducting membrane by radiation induced grafting of 4-vinylpyridine onto poly(vinylidene fluoride) and phosphoric acid doping

Parametric investigations on proton conducting membrane by radiation induced grafting of 4-vinylpyridine onto poly(vinylidene fluoride) and phosphoric acid doping

Radiation-grafted materials for energy conversion and energy storage applications

Comparative investigations of radiation‐grafted proton‐exchange membranes prepared using single‐step and conventional two‐step radiation‐induced grafting methods

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