Epoxy (EP) resins are widely involved in the field of polymer coatings as a result of their excellent mechanical performance, superior chemical durability and good adhesion to the substrate. However, the undesirable tribological properties of epoxy pose a challenge for their application and development in protective coatings. Herein, an epoxy-based multifunctional nanocomposite coating (EP-PMo) was prepared by brief ultrasonic dispersion method. Specifically, epoxy matrix was modified by one-step blending using a complex of the emerging two-dimensional materials MXene (Mo2C) and polytetrafluoroethylene (PTFE). The chemical structure of the coatings was characterized using XRD, XPS, FT-IR, and the surface morphology and elemental distribution were analyzed using SEM/EDS. The prepared nanocomposite coating exhibits excellent tribological properties, thermal conductivity and salt water corrosion resistance. The lubricity of the nanocomposite was improved by 80 % compared to EP. The coefficient of friction (COF) of the EP-PMo containing 0.4 wt% Mo2C was only 0.09, proving that EP-PMo4 coating has superior lubricity performance. Moreover, due to the excellent thermal conductivity of the nanocomposite coating, the surface temperature of the coating increased by 37 % after it was placed on a 60 °C hot table for 10 s. The COF of the nanocomposite coating changed slightly in simulated seawater after 6 days immersion. Therefore, the EP-PMo coating combines thermal conductivity, anti-corrosion, and friction resistance, which has potential applications in the field of protective coatings for marine equipment and metal devices.

中文翻译：

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由摩擦化学机制驱动的含 Mo2C MXene 的基于抗摩擦环氧树脂的自润滑涂料


环氧 （EP） 树脂因其优异的机械性能、卓越的化学耐久性和对基材的良好附着力而广泛涉足聚合物涂料领域。然而，环氧树脂不良的摩擦学特性对其在保护涂层中的应用和开发构成了挑战。在此，通过简短的超声分散法制备了一种环氧基多功能纳米复合涂层 （EP-PMo）。具体来说，使用新兴二维材料 MXene （Mo2C） 和聚四氟乙烯 （PTFE） 的复合物通过一步共混对环氧树脂基体进行改性。使用 XRD、XPS、FT-IR 对涂层的化学结构进行表征，并使用 SEM/EDS 分析表面形貌和元素分布。所制备的纳米复合涂层表现出优异的摩擦学性能、导热性和耐盐水腐蚀性。与 EP 相比，纳米复合材料的润滑性提高了 80%。含 0.4 wt% Mo2C 的 EP-PMo 的摩擦系数 （COF） 仅为 0.09，证明 EP-PMo4 涂层具有优异的润滑性能。此外，由于纳米复合涂层具有出色的导热性，将涂层置于 60 °C 的热台上 10 s 后，涂层的表面温度提高了 37%。纳米复合涂层在模拟海水中浸泡 6 d 后 COF 略有变化。因此，EP-PMo 涂层兼具导热性、防腐蚀性和耐摩擦性，在船用设备和金属装置的防护涂层领域具有潜在的应用前景。