Modification of the Physical-mechanical Properties of Bamboo-plastic Composites with Bamboo Charcoal after Hydrothermal Aging

Qi Chen, Rong Zhang, Daochun Qin, Zexu Feng, Yangao Wang

Abstract


The physical-mechanical properties of bamboo-polyethylene composites (BPCs) change depending on the environmental temperature and exposure to moisture during outdoor use. In this study, the water absorption, density, mechanical properties, and wear rate of the composites were tested after immersion in water, and four water temperatures were examined. Bamboo charcoal (BC) was used to improve the properties of the BPCs after hydrothermal aging. The composites were improved because of the strong interfacial interactions between the BC and polymers. The experimental results showed that the water diffusion rate accelerated as the water temperature increased. The BC reduced the water absorption at all of the water temperatures and the diffusion coefficient at temperatures above 39 °C. The wear rate of the composites first increased, and then decreased as the water temperature increased. The density and flexural properties decreased with an increased hydrothermal aging temperature. Overall, hydrothermal aging decreased the water resistance and mechanical properties. Additionally, these effects were enhanced as the water temperature increased, but were countered by the incorporation of the BC.

Keywords


Bamboo-plastic composites; Bamboo charcoal; Hydrothermal aging; Wear rate; Mechanical properties

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