Modification of chitosan membranes with nanosilica particles as polymer electrolyte membranes

Kusumastuti, Ella; Siniwi, Widasari Trisna; Mahatmanti, F. Widhi; Jumaeri,; Atmaja, Lukman; Widiastuti, Nurul

doi:10.1063/1.4945491

Cited by 3 publications

(2 citation statements)

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“…The lowest methanol permeability on the modified membrane is found on a 4% s-SiO2 membrane and its value is 0.99 x 10 -7 cm 2 /s at 30 minutes and 3.31 x 10 -7 cm 2 /s at 60 minutes on Sol-gel. The decrease in Permeability is due to ion-exchangeable acid groups that promote proton conduction by forming a hydrogen bond network that is strong enough to resist methanol permeability [34,35]. The permeability of the modified chitosan membrane decreases by almost 2 % when compared to the unmodified silica-chitosan material.…”

Section: Methanol Permeability Of Chitosan Membranesmentioning

confidence: 99%

Chitosan Membranes for Direct Methanol Fuel Cell Applications

Nemavhola,

Modau,

Sigwadi

et al. 2023

Preprint

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The purpose of this study is to identify the steps involved in fabricating silica/chitosan composite membranes and their suitability in fuel cell application. It also intends to identify the physical characteristics of chitosan composite membranes, including their degree of water absorption, proton conductivity, methanol permeability, and functional groups. In this investigation, composite membranes were fabricated using the solution casting method with chitosan content of 5 g and silica variations dosage of 2% and 4% while stirring at a constant speed for 2h. According to the findings, the analysis of composite membranes produced chitosan membranes that were successfully modified with silica. The optimum membrane was found to be 4% s-SiO2 from the Sol-gel method with composite membrane's optimal condition of 0.234 cm/s proton conductivity, water uptake of 56.21%, and reduced methanol permeability of 0.99 × 10 -7 cm2/s in the first 30 minutes and 3.31 × 10-7 in the last 150 minutes. Maintaining lower water uptake capacity at higher silica content is still a challenge that needs to be addressed. However, the fabricated membranes showed exceptional results in terms of proton conductivity and methanol permeability.

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Section: Methanol Permeability Of Chitosan Membranesmentioning

confidence: 99%

Chitosan Membranes for Direct Methanol Fuel Cell Applications

Nemavhola,

Modau,

Sigwadi

et al. 2023

Preprint

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“…Figure 12 illustrates the lowest methanol permeability on the modified membrane, which is found on a 4% s-SiO 2 membrane, with values of 1.79 × 10 −7 cm 2 /s at 30 min and 2.31 × 10 −7 cm 2 /s at 90 min. The decrease in permeability is due to ion-exchangeable acid groups that promote proton conduction by forming a hydrogen bond network that is strong enough to resist methanol permeability [38,39]. The permeability of the modified chitosan membrane decreases by almost 2% when compared to the unmodified chitosan membrane.…”

Section: Methanol Permeability Of Chitosan Membranesmentioning

confidence: 99%

Chitosan Membranes for Direct Methanol Fuel Cell Applications

Modau,

Sigwadi,

Mokrani

et al. 2023

Membranes

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The purpose of this study is to identify the steps involved in fabricating silica/chitosan composite membranes and their suitability for fuel cell applications. It also intends to identify the physical characteristics of chitosan composite membranes, including their degree of water absorption, proton conductivity, methanol permeability, and functional groups. In this investigation, composite membranes were fabricated using the solution casting method with a chitosan content of 5 g and silica dosage variations of 2% and 4% while stirring at a constant speed for 2 h. According to the findings, the analysis of composite membranes produced chitosan membranes that were successfully modified with silica. The optimum membrane was found to be 4% s-SiO2 from the Sol-gel method with the composite membrane’s optimal condition of 0.234 cm/s proton conductivity, water uptake of 56.21%, and reduced methanol permeability of 0.99 × 10−7 cm2/s in the first 30 min and 3.31 × 10−7 in the last 150 min. Maintaining lower water uptake capacity at higher silica content is still a challenge that needs to be addressed. In conclusion, the fabricated membranes showed exceptional results in terms of proton conductivity and methanol permeability.

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