The present study addresses the tribological behavior of polyester composites reinforced with a natural fiber (sisal), a synthetic fiber (glass) and their combination (glass/sisal hybrid). The composites were obtained by compression molding with an overall fiber content of 20 or 40 vol%. The composites were rubbed against a steel counterface using a tribometer. Pure sisal composite exhibited superior wear resistance, mainly due to the formation of a concise tribofilm. It also showed the lowest coefficient of friction (CoF) because of the lubricating action of the water present in the natural fiber. Pure glass composite showed the lowest wear resistance due to the strong abrasive effect of the glass fibers. The increase in fiber content lead to an increase in CoF and its effect on wear was complex and discussed throughout the article.

中文翻译：

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玻璃/剑麻纤维增强聚酯复合材料的摩擦学行为

本研究解决了由天然纤维（剑麻），合成纤维（玻璃）及其组合（玻璃/剑麻混合材料）增强的聚酯复合材料的摩擦学行为。通过压缩模塑获得总纤维含量为20或40vol％的复合材料。使用摩擦计将复合材料摩擦在钢对接面上。纯剑麻复合材料具有卓越的耐磨性，这主要是由于形成了简洁的摩擦膜。由于天然纤维中存在的水的润滑作用，它还显示出最低的摩擦系数（CoF）。由于玻璃纤维的强磨蚀作用，纯玻璃复合材料显示出最低的耐磨性。纤维含量的增加导致CoF的增加，并且其对磨损的影响非常复杂，在整篇文章中都有讨论。