A study on surface modification with Ar and N₂ plasma of hybrid PTFE/Kevlar fabrics was conducted. The chemical and molecular structure changes of the PTFE and Kevlar fibers were analyzed as well as their surface properties i.e. roughness, morphology, wettability, and surface energy. The results show that the treatment caused etching and defluorination on the PTFE fiber surface improving its hydrophilicity, surface energy, and adhesion of the Kevlar fiber without weakening its mechanical strength. The plasma treatment contributed to improving the interfacial strength of the composite, enhancing its adhesion to the metal substrate. The long-term friction and wear behaviors were also investigated to obtain a better understanding of the tribological properties of the hybrid Kevlar/PTFE-epoxy/phenolic composites. The results illustrate that the treated fabric composite showed better wear resistance and self-lubrication performance due to the improved wettability and adhesive properties of the fabrics. The modification effect of the sample treated with Ar plasma is better; however, N₂ is economical, and the effect is also significant.

中文翻译：

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Kevlar/PTFE 杂化织物表面的等离子体改性对胶粘剂和摩擦学性能的影响


对 PTFE/Kevlar 杂化织物的 Ar 和 N₂ 等离子体进行表面改性的研究。分析了 PTFE 和 Kevlar 纤维的化学和分子结构变化，以及它们的表面性质，即粗糙度、形态、润湿性和表面能。结果表明，该处理导致 PTFE 纤维表面发生蚀刻和脱氟，提高了其亲水性、表面能和凯夫拉纤维的附着力，而不会削弱其机械强度。等离子体处理有助于提高复合材料的界面强度，增强其与金属基材的附着力。还研究了长期摩擦和磨损行为，以更好地了解 Kevlar/PTFE-环氧/酚醛复合材料的摩擦学特性。结果表明，由于织物的润湿性和粘合性能得到改善，处理后的织物复合材料表现出更好的耐磨性和自润滑性能。Ar 等离子体处理样品的修饰效果较好;然而，N₂ 是经济的，效果也很显着。