Abdul Samad Mohammed
Department of Mechanical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
Polymers (Basel). 2021 Feb 18;13(4):608. doi: 10.3390/polym13040608.
In the recent past, polymer coatings have gained the attention of many researchers due to their low cost, their ability to be coated easily on different substrates, low friction and good anti-corrosion properties. Various polymers such as polytetrafluroethylene (PTFE), polyether ether ketone (PEEK), polymethylmethacrylate (PMMA), polyurethane (PU), polyamide (PA), epoxy and ultra-high molecular weight polytheylene (UHMWPE) have been used to develop these coatings to modify the surfaces of different components to protect them from wear and corrosion. However, among all these polymers, UHMWPE stands out as a tribologist's polymer due to its low friction and high wear resistance. These coatings have found their way into applications ranging from microelectro mechanical systems (MEMS) to demanding tribological applications such as bearings and biomedical applications. Despite its excellent tribological properties, UHMWPE suffers from limitations such as low load bearing capacity and low thermal stability. To overcome these challenges researchers have developed various routes such as developing UHMWPE composite and hybrid composite coatings with several types of nano/micro fillers, developing composite films system and developing dual film systems. The present paper is an effort to summarize these various routes adopted by different researchers to improve the tribological performance of UHMWPE coatings.
近年来，聚合物涂层因其成本低、易于涂覆在不同基材上、低摩擦和良好的防腐性能而受到众多研究人员的关注。各种聚合物，如聚四氟乙烯（PTFE）、聚醚醚酮（PEEK）、聚甲基丙烯酸甲酯（PMMA）、聚氨酯（PU）、聚酰胺（PA）、环氧树脂和超高分子量聚乙烯（UHMWPE），已被用于开发这些涂层，以改性不同部件的表面，保护它们免受磨损和腐蚀。然而，在所有这些聚合物中，UHMWPE因其低摩擦和高耐磨性而成为摩擦学家眼中的聚合物。这些涂层已应用于从微机电系统（MEMS）到诸如轴承等苛刻的摩擦学应用以及生物医学应用等领域。尽管UHMWPE具有优异的摩擦学性能，但它也存在诸如低承载能力和低热稳定性等局限性。为了克服这些挑战，研究人员开发了各种途径，如开发含有几种类型的纳米/微米填料的UHMWPE复合涂层和混合复合涂层、开发复合薄膜体系以及开发双膜体系。本文旨在总结不同研究人员为提高UHMWPE涂层的摩擦学性能而采用的各种途径。
