Degradation of the elastomeric gasket material in a simulated and four accelerated proton exchange membrane fuel cell environments

Li, Guo; Tan, Jinzhu; Gong, Jianming

doi:10.1016/j.jpowsour.2011.06.092

Cited by 26 publications

(14 citation statements)

References 24 publications

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“…Silicone elastomers (cross-linked siloxane chains) suffer hydrolysis when exposed to aqueous acid, in particular at elevated temperature. ,− The same is true for silicone-based surfactants (siloxane chains bearing polyethoxylate side chains) . Interestingly, in the latter authors’ experiments, wastewater of pH 7.8 caused siloxane hydrolysis more rapidly than did aqueous HCl of pH 2.…”

Section: Persistence Bioaccumulation Toxicity Regulatory Affairsmentioning

confidence: 93%

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Environmental Chemistry of Organosiloxanes

2014

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Section: Persistence Bioaccumulation Toxicity Regulatory Affairsmentioning

confidence: 93%

“…Upon treatment with very strong acids such as Nafion H at elevated temperatures, silicone elastomers suffer Si–C cleavage, as shown by decreased C/Si and increased O/Si ratios in exposed surfaces. , …”

Section: Degradation Of Organosiloxanesmentioning

confidence: 99%

Environmental Chemistry of Organosiloxanes

2014

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“…In this paper, the aging process of the silicone rubber was studied in one simulated PEM fuel cell environment and three accelerated durability test solutions which were different from the ones in our previous work [23]. High resolution analysis of X-ray photoelectron spectroscopy (XPS) was conducted in this study.…”

Section: Introductionmentioning

confidence: 99%

Chemical aging of the silicone rubber in a simulated and three accelerated proton exchange membrane fuel cell environments

Tan

Gong

2012

Journal of Power Sources

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“…Silicone is considered to be a potential candidate for PEMFC due to low cost, good mechanical properties and easy manufacturing process [15,16]. There are many reports focusing on the chemical and mechanical stability of silicone rubbers in various testing environments [17,18,19,20,21,22].…”

Section: Introductionmentioning

confidence: 99%

“…There are many reports focusing on the chemical and mechanical stability of silicone rubbers in various testing environments [17,18,19,20,21,22]. Li et al [16,17] investigated the degradation of silicone rubbers exposed to simulated and accelerated proton exchange membrane fuel cell environments. They found that the concentration of the acid in test solutions has a significant effect on the degradation of silicone rubbers.…”

Section: Introductionmentioning

confidence: 99%

Degradation of Silicone Rubbers as Sealing Materials for Proton Exchange Membrane Fuel Cells under Temperature Cycling

Chen

Yan

et al. 2018

Polymers

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Gaskets are compressed in proton exchange membrane fuel cells (PEMFCs) to keep fuel, oxidant and coolant within their respective regions and are very important for sealing and maintaining electrochemical performance of fuel cells during their long-term operation. It has been proved that the gas leakage caused by the failure of the gaskets following long-term operation is one of the main reasons for PEMFC performance degradation. In this work, degradation of silicone rubbers, the potential gasket materials for PEMFCs, were investigated in the simulated PEMFC environment solution, weak acid solution, de-ionized water and air, respectively, under alternating temperature cycling from −20 • C to 90 • C. The changes in hardness, weight, chemical properties, mechanical behavior and surface morphology of the samples of silicone rubbers were studied after a certain number of temperature cycles. The results show that with the increase in temperature cycles, the hardness of the samples increases and the weight of the samples decreases gradually. Scanning electron microscopy reveals that cracks and caves constantly appear on the surface of the samples. Attenuated total reflection Fourier transform infrared spectra (ATR-FTIR) results demonstrate that the surface chemistry changes via de-crosslinking and chain scission in the backbone due to the exposure of samples to the environments over time under alternating temperature cycles.

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Degradation of the elastomeric gasket material in a simulated and four accelerated proton exchange membrane fuel cell environments

Cited by 26 publications

References 24 publications

Environmental Chemistry of Organosiloxanes

Environmental Chemistry of Organosiloxanes

Chemical aging of the silicone rubber in a simulated and three accelerated proton exchange membrane fuel cell environments

Degradation of Silicone Rubbers as Sealing Materials for Proton Exchange Membrane Fuel Cells under Temperature Cycling

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