The structure–property–performance relationship of disulfonated naphthyl pendants bearing poly(aryl ether)s for polymer electrolyte membrane applications

Lu, Yao; Zhang, Xulve; Yan, Xiangbin; Hu, Zhaoxia; Chen, Shouwen

doi:10.1016/j.memsci.2018.01.065

Cited by 22 publications

(12 citation statements)

References 43 publications

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“…Volumetric IEC in the dry state (IEC v dry ) was calculated by multiplying IEC w by membrane density (ρ) which was calculated from the weight and dimensions of dried membrane samples. Volumetric IEC in the wet state (IEC v wet ) was then determined from IEC v dry and water uptake of the membrane 28,29,36,37 using Equation (2):

{italicIEC}_{v wet} = \frac{{IEC}_{V italicdry}}{1 + 0.01 water uptake}

Water uptake of membranes at room temperature and 80°C was obtained by measuring the difference between the mass of membranes at wet and dry states after 24 h according to the Equation (3).

water uptake (%) = \frac{W_{italicwet} - W_{italicdry}}{W_{dry}} \times 100

Through‐plane swelling ratio was also calculated at room temperature and 80°C from the changes of thickness of membranes after 24 h of immersion in deionized water according to Equation (4).…”

Section: Methodsmentioning

confidence: 99%

“…Lu and his coworkers synthesized fluorinated poly(arylene ether) copolymers using different diphenols, including a bulky fluorene monomer. They found that, unlike sulfone functional groups, the bulky fluorene suppresses water uptake of the membranes despite its larger free volume, which could be related to the rigidity of the backbone of the fluorene‐containing polymer 28 . In another work conducted by Kim and coworkers, incorporating fluorine or other polar functional groups like phenyl phosphine oxide and benzonitrile in poly(arylene ether sulfone) backbone was investigated.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of properties and performance of poly(ether sulfone ketone) membranes in proton exchange membrane fuel cells

Oroujzadeh

Mehdipour‐Ataei

2022

Polymers for Advanced Techs

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Two series of sulfonated poly(ether sulfone ketone)s have been synthesized. The effect of different ratios of sulfone: ketone functional groups on the properties and performance of membranes is studied. The density, ion‐exchange capacity, water absorption, swelling ratio, proton conductivity, thermal and oxidative stability of membranes are determined. The results showed that membranes with higher contents of sulfone functional groups show lower density and consequently higher water absorption and swelling ratio values. A precise evaluation of the effect of different sulfone: ketone functional group ratios on the analytical acid concentration and the effective proton mobility and their relationship with water absorption have been performed. The proton conductivity values are between 71–78 mS.cm−1 at 30°C and 117–208 mS.cm−1 at 80°C. The effective proton mobilities at 80°C are in the range of 10.27 × 10 −4 to 16.68 × 10 −4 cm2.V−1.s−1. The highest current density for prepared membranes in H2/O2 single cell at 100% relative humidity and 80°C is 1900 mA.cm−2.

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{italicIEC}_{v wet} = \frac{{IEC}_{V italicdry}}{1 + 0.01 water uptake}

Water uptake of membranes at room temperature and 80°C was obtained by measuring the difference between the mass of membranes at wet and dry states after 24 h according to the Equation (3).

water uptake (%) = \frac{W_{italicwet} - W_{italicdry}}{W_{dry}} \times 100

Through‐plane swelling ratio was also calculated at room temperature and 80°C from the changes of thickness of membranes after 24 h of immersion in deionized water according to Equation (4).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of properties and performance of poly(ether sulfone ketone) membranes in proton exchange membrane fuel cells

Oroujzadeh

Mehdipour‐Ataei

2022

Polymers for Advanced Techs

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“…In Figure 12, all membranes displayed three decomposition stages. The first stage under 120 °C was due to the loss of water and small molecule solvents, 67 the second stage from 230 to 350 °C was assigned to the decomposition of the grafted pendant chain segments, 50 and the third stage, starting from 470 to 600 °C, was attributed to the degradation of the polymer PAEK main chain. 68 Furthermore, all of the decomposition temperatures at 5% weight loss (T d5% ) of the samples were higher than 260 °C.…”

Section: Characterization Of N Mmentioning

confidence: 99%

Poly(arylene ether ketone) with an Ultrahigh-Selectivity Hydrophilic Phase Proton Transport Channel by Grafting Sulfonated Benzotriazole Groups onto Pendant Chains

Liu

Wang

et al. 2020

ACS Sustainable Chem. Eng.

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The practice of site control for functional groups to achieve better interactions has become popular in recent years. Capitalizing on such developments, sulfonated 5-carboxybenzotriazole (SCBTA), serving as a new monomer that combines multiple functional groups, is grafted onto pendant chains of poly(arylene ether ketone) (PAEK) via an amidation reaction to fabricate a series of novel proton-exchange membranes (N m A n -SCBTA). The structure of the resulting membranes is confirmed by 1H NMR and Fourier transform infrared (FT-IR). Transmission electron microscopy (TEM) and small-angle X-ray spectroscopy (SAXS) analyses reveal well-defined microphase-separated structures. Among these samples, a membrane having an amino bisphenol monomer content of 70% (N7A3-SCBTA) exhibits high conductivity (0.089 S·cm–1, at 90 °C), oxidative stability (95.7%), and tensile strength (65.74 MPa), while its selectivity is as high as 91.9 × 104 S·s·cm–3 at 25 °C; this value is even more than 27 times that of recast Nafion (3.3 × 104 S·s·cm–3). These results indicate that there is great potential for these membranes to be used in direct methanol fuel cells (DMFCs).

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“…Composite materials of ion exchange polymers and electroactive metal particles are also of interest for electrochemical device applications. Interactions between metal particles and the ion exchange polymer can affect intrinsic properties such as crystallinity and morphology, which in turn influence the mechanical properties, transport of ionic species, water content, and diffusion of reactant and product gases. − Studies focused on Pt-based catalysts in both alkaline , and acidic − systems have demonstrated the importance of identifying and minimizing polymer–catalyst interactions to mitigate polymer adsorption to the catalyst surface and improve performance. A few studies have focused on other catalyst surfaces, such as Au ,, and Ag .…”

Section: Introductionmentioning

confidence: 99%

Investigating Silver Nanoparticle Interactions with Quaternary Ammonium Functionalized Triblock Copolymers and Their Effect on Midblock Crystallinity

Buggy

Kuo

et al. 2020

ACS Appl. Polym. Mater.

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Interactions between silver nanoparticles and a cationic triblock copolymer significantly alter bulk material properties and can be tuned by functionalizing the polymer with different quaternary ammonium cations (QACs). In this work, polychloromethylstyrene-b-polycyclooctene-b-polychloromethylstyrene (PCMS-b-PCOE-b-PCMS) was quaternized with either methylpiperidinium (MPRD) or trimethylammonium (TMA). The surface interacting groups were identified by using FT-IR to be the phenyl rings, the QACs from the outer blocks, and vinyl groups from the PCOE midblock. Changes in thermal characteristics and crystallinity were highly dependent on the QAC, uncovering differences in the nature of the interactions between silver and TMA or MPRD. Interactions induced by TMA greatly hinder crystalline domain formation and give rise to a higher water content, while MPRD promotes certain crystalline orientations and provides a greater degree of crystallinity with a lower water content. Our findings demonstrate that bulk polymer characteristics can be tuned, a highly desirable attribute for many nanocomposite materials.

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The structure–property–performance relationship of disulfonated naphthyl pendants bearing poly(aryl ether)s for polymer electrolyte membrane applications

Cited by 22 publications

References 43 publications

Evaluation of properties and performance of poly(ether sulfone ketone) membranes in proton exchange membrane fuel cells

Evaluation of properties and performance of poly(ether sulfone ketone) membranes in proton exchange membrane fuel cells

Poly(arylene ether ketone) with an Ultrahigh-Selectivity Hydrophilic Phase Proton Transport Channel by Grafting Sulfonated Benzotriazole Groups onto Pendant Chains

Investigating Silver Nanoparticle Interactions with Quaternary Ammonium Functionalized Triblock Copolymers and Their Effect on Midblock Crystallinity

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