Composite membrane of sulfonated polybenzimidazole and sulfonated graphene oxide for potential application in microbial fuel cell

Mondal, Sudipta; Papiya, Farhan; Ash, Saumendra Nath; Kundu, Patit Paban

doi:10.1016/j.jece.2020.104945

Cited by 38 publications

(15 citation statements)

References 48 publications

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“…Nevertheless, the functionalization of GO with organosilanes is an important strategy to produce graphene-silica composites, which can be used as reinforcement in polymer nanocomposites, for example. Another extensively used reaction to derivatize GO involves chlorosulfonic acid (HSO3Cl) to transform the hydroxy groups into organosulfates (-C-O-SO2-OH), thus allowing the preparation of sulfated GO 67 .…”

Section: Hydroxy Group Derivatizationmentioning

confidence: 99%

Controlling covalent chemistry on graphene oxide

et al. 2022

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Section: Hydroxy Group Derivatizationmentioning

confidence: 99%

Controlling covalent chemistry on graphene oxide

et al. 2022

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“…This is due to the presence of hydrophilic groups in SGO that can interact with water via hydrogen bonds or electrostatic bonds. 27 In addition, the softening and flexibility of the polymer at higher temperatures creates space by expanding to accommodate more water molecules. 19,[42][43][44][45][46][47][48] Studying the expansion of these membranes provides a deep understanding of the potential distortion that occurs when a membrane is subjected to moisture, tensile, and thermal stresses that exceed its yield point and cause it to swell or elongate.…”

Section: Membrane Propertiesmentioning

confidence: 99%

“…The author added that the presence of SGO on the polymer matrix improves the thermal and mechanical strength through electrostatic and hydrogen interaction. Mondal et al 27 attributed the improvement in tensile strength and young modulus of SPBI/SGO composites to the increase in SGO weight fraction. Gahlot et al 28 demonstrated the effect of SGO when they successfully fabricated proton exchange membranes (PEMs) consisting of sulfonated poly(ether sulfone) (SPES) with improved electrochemical properties by incorporating different amounts of sulfonated graphene oxide (SGO) in their publication.…”

Section: Introductionmentioning

confidence: 99%

Sulfonated graphene oxide/sulfonated poly (2,6‐ dimethyl – 1,4‐phenylene oxide) as a potential proton exchange membrane for iron air flow battery application

Phela

Sigwadi

Msomi

2023

Polymers for Advanced Techs

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A series of proton exchange membranes (PEMs) of sulfonated poly(2,6‐dimethyl‐1,4‐phenylene oxide) (SPPO) with different sulfonated graphene oxide (SGO) (0, 0.25, 0.5, 0.75, 1.0, 1.5%) were prepared for possible application in Iron‐air/flow battery. The presence of SGO in the membrane improved the water uptake of all membranes prepared and decreased the swelling ratio. The SPPO/1% w/w SGO showed good properties with higher water uptake of 44.1%, water retention of 42.48% and swelling ratio of 21.4% at 25°C. However, the 0.75% SGO exhibited the highest proton conductivity of 0.98 S/cm and better dispersion, elemental distribution, and morphology. In addition, SGO improved the thermal stability of all composite membranes. The chemical stability of all membranes remained good after 7 days in a 1 M HCL solution. The SPPO/0.75%w/w SGO showed increased proton conductivity when degradation properties were evaluated. Compared to Nafion 117, all composites showed lower iron crossover. Nafion had a high permeability of 3.03 × 10−7 cm−2/s, which is 75% higher than the 7.6 × 10−8 cm−2/s of SPPO/SGO‐1.5% and 52% higher than the 1.46 × 10−7 cm−2/s of SPPO/SGO‐0.75%. The results indicate that SGO is a good inorganic filler for the composite proton exchange membrane and stable enough for possible application in an iron‐air/flow battery.

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“…40 The TGA curve of SGO nanosheets exhibited an initial weight loss period at around 100 C, which was mainly caused by the evaporation of the adsorbed and bound surface water molecules in the layered structure. 29 The subsequent weight loss was ascribed to the decomposition of sulfonated groups and the different oxygen-containing functional groups on edges and basal planes in SGO nanosheets. 41 For (PVC/SGO) 5 membranes, the weight loss started at about 190 C due to the release of HCl from PVC and the decomposition of SGO nanosheets.…”

Section: Thermal Stabilitymentioning

confidence: 99%

“…28 Recently, the composite membranes consisting of SGO nanosheets have been synthesized and they showed better electrical performance in microbial fuel cells (MFCs) owing to the less agglomerated structure. 29 PVC is one of the most widely used vinyl polymers in the fields of construction industry and biomedical application, which can function as barriers and membranes. 30,31 Besides that, the application of PEMs based on PVC has been frequently reported owing to the fine physical and chemical robustness, cost and stiffness, etc.32-35 Specifically, the PA doped PTFE/PP membrane presented a conductivity of 1.54 Â 10 À1 S/cm at 160 C. 35 Furthermore, a polymerized ionic liquid of PVC-MIMCl was prepared through PVC reacting with Nmethylimidazole.…”

Section: Introductionmentioning

confidence: 99%

A facile strategy to construct layered membranes with high and stable proton conductivity based on sulfonated graphene oxide

Jin

Jia

Song

et al. 2021

Intl J of Energy Research

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Spin coating as an easy-operation strategy to construct layered membranes has been widely mentioned in the fields of microelectronics, energy storage, and conversion, etc. In this research, the successful construction of proton exchange membranes (PEMs) bearing layered structure consisting of sulfonated graphene oxide (SGO) nanosheets and polyvinyl chloride (PVC) with the spin coating method has been demonstrated by the identification of the multilayered dispersion of components and compact structure. The hydrophilic SGO nanosheets could increase the hydrophilicity of composite membranes since they bore a large number of polar oxygen functional groups. Phosphoric acid (PA) can be combined through the formed intermolecular hydrogen bonds between PA molecules and SGO nanosheets. The content of PA in PEMs can be adjusted by controlling the concentration of PA solutions, immersion temperature, and duration time. A comparative study with the membrane from the solution casting method has been performed, expecting to understand the influence of layered structure on membrane performance. It was found that the well-ordered distribution of SGO nanosheets facilitated proton conduction, demonstrating from the proton conductivity of 3.63 Â 10 À2 S/cm at 150 C. The fine proton conductivity stability, for instance, the result of 2.71 Â 10 À2 S/cm at 140 C lasting 1000-hour supported the component stability and mechanical strength. The research revealed that the spin coating technique could provide a facile and effective strategy to construct wellordered membrane electrolytes for the application of high-temperature proton exchange membrane fuel cells.

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Composite membrane of sulfonated polybenzimidazole and sulfonated graphene oxide for potential application in microbial fuel cell

Cited by 38 publications

References 48 publications

Controlling covalent chemistry on graphene oxide

Controlling covalent chemistry on graphene oxide

Sulfonated graphene oxide/sulfonated poly (2,6‐ dimethyl – 1,4‐phenylene oxide) as a potential proton exchange membrane for iron air flow battery application

A facile strategy to construct layered membranes with high and stable proton conductivity based on sulfonated graphene oxide

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