Abstract
An investigation was carried out concerning the hydrothermal aging effect on the water intake character of aramid/epoxy composites based on the dimension effect. The aramid/epoxy composites were manufactured by the vacuum assisted resin infusion method (VARIM) kept in distilled water and sea water at 25 °C and 70 °C for 6 weeks in a controllable aging cabin. The water absorption behavior of composite samples cut with different length/width (L/w) ratios was assessed according to different water types and temperatures. Besides, the water intake character of aramid/epoxy samples was interpreted theoretically according to the Fick model. The experimental and theoretical results showed that aramid/epoxy composites displayed a tendency consistent with the Fickian model. Further, the water intake character of aramid/epoxy samples was affected by criteria such as sea water, distilled water, temperature, and different L/w ratio. The temperature increase was caused to more water absorption. Further, the increase of L/w ratio was caused to more water intake for both water types.
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