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Electromechanical actuation in microporous dielectric elastomer under simulated aerospace conditions towards pressure sensing applications
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DOI：10.1088/1361-6463/ae5ddf.png)
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Abstract
En 中文
Microporous elastomers are promising materials for highly sensitive pressure sensors, yet their performance under varying atmospheric conditions remains to be completely understood. This study systematically investigates the electromechanical actuation behavior of VHB 4910 as a microporous dielectric elastomer, focusing on the synergistic effects of varying vacuum and temperature. The aim is to understand the effects of simulated aerospace conditions on electromechanical performance to use for pressure sensing applications, following experimental work with statistical validation models. Actuation responses were mapped across the atmospheric pressure reduced by 100-500 mmHg and temperatures ranging from 40 degrees C to 100 degrees C. The results reveal a complex, non-linear interdependency where environmental parameters fundamentally alter the actuation-voltage relationship. Temperature strongly governs performance, with actuation increasing (up to similar to 70 degrees C-85 degrees C) and failure, breakdown voltage decreasing due to mechanisms such as the Poole-Frenkel effect, whereas vacuum has a weaker, non-monotonic influence consistent with Paschen's law. Tukey HSD (alpha = 0.05) shows temperature effects on actuation (similar to 18.2% per 20 degrees C) dominate over vacuum effects (similar to-9.1% per 100 mmHg), providing a basis for modeling electromechanical behavior of microporous materials for pressure sensing applications.
Keywords:
temperature
vacuum
dielectric elastomer
electrical breakdown
actuation
ANOVA
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