The temperature and humidity levels have a significant impact on the aging of silicone rubbers, which are used as sealing materials for proton exchange membrane fuel cell applications. High temperature and humidity conditions often accelerate the aging process in these materials.
At elevated temperatures, the material's molecular structure can change or degrade, reducing its effectiveness as a sealant. This can lead to leaks, which would negatively affect the fuel cell's performance. Moreover, these conditions can also affect the rubber’s mechanical properties such as tensile strength and elongation’s capacity.
Similarly, high levels of humidity can lead to additional challenges. Humidity can cause silicone rubbers to swell or expand, potentially damaging the seal and compromising its ability to function correctly. Also, moisture can initiate hydrolysis of certain constituents in the rubber, further leading to degradation.
In conclusion, for prolonging the life of silicone rubbers used in proton exchange membrane fuel cell applications, the effects of temperature and humidity need to be carefully considered during their manufacturing and operation stages.
It's worth mentioning that many researchers are working on developing new types of silicone rubbers that are more resistant to these aging factors. Therefore, continuous research and development in this area is essential. |
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