ABSTRACT

In this work, Linear Low Density Polyethylene (LLDPE)/graphite micro-composite coatings were deposited on an LLDPE substrate using the thermo-compression technique. The studied values of the mass fraction of graphite particles were 0, 2, 5, 10 and 20 wt.%. LLDPE/graphite micro-composite films, with no additional substrate, were also developed with the same graphite mass fractions used with the coatings and applying the same preparation technique. Tribological characterisations under continuous sliding were carried out on the micro-composite coatings using a ball-on-disc rotating tribometer. Tensile tests were performed on the micro-composite films in order to determine the optimum reinforcement composition. The results show that the addition of graphite with low mass fractions improves both friction and wear performances. The coating containing 10 wt.% graphite showed the best tribological performances. A significant and continuous decrease in the tensile strength and elongation at fracture of the micro-composites is achieved as the graphite mass fraction increases.

摘要

在这项工作中，使用热压技术将线性低密度聚乙烯 (LLDPE)/石墨微复合涂层沉积在 LLDPE 基材上。石墨颗粒质量分数的研究值为0、2、5、10和20wt.%。LLDPE/石墨微复合薄膜，没有额外的基材，也开发了与涂层使用相同的石墨质量分数并应用相同的制备技术。使用球盘旋转摩擦计对微复合涂层进行连续滑动下的摩擦学表征。对微复合薄膜进行了拉伸试验，以确定最佳的增强材料组合物。结果表明，添加低质量分数的石墨可以改善摩擦和磨损性能。含有 10 wt.% 石墨的涂层表现出最好的摩擦学性能。随着石墨质量分数的增加，微复合材料的拉伸强度和断裂伸长率显着且持续降低。