Abstract The paper describes a hydrothermal synthesis of one new-style inorganic modified graphene nanomaterial called magnesium silicate hydroxide/graphene (MSH/graphene) in a MgO-SiO2-graphite-H2O system, and reveals its tribological behaviors as additives in poly-alpha-olefin (PAO). These MSH/graphene nanocomposites consist of MSH and various forms of graphene evolved from natural microcrystalline graphite. Four-ball experiments indicate that MSH/graphene nanocomposites as additives in PAO display outstanding tribological performances and nearly eliminate wear despite a severe contact pressure of 3.91 GPa. This can be attributed to the attachment of graphene to MSH, enabling it to successfully enter the asperity clearances so as to bring into full play to graphene's extreme mechanical strength and/or forming a tribofilm consisting of nanocrystalline graphite and amorphous carbon (a-C) on the sliding surfaces.

中文翻译：

---

MgO-SiO2-石墨-H2O碱性体系中水热合成氢氧化硅酸镁/石墨烯纳米复合材料及其在抗磨损添加剂中的应用

摘要 本文描述了一种新型无机改性石墨烯纳米材料，称为氢氧化镁硅酸镁/石墨烯（MSH/石墨烯）在 MgO-SiO2-graphite-H2O 体系中的水热合成，并揭示了其作为添加剂在聚-α-烯烃 (PAO)。这些 MSH/石墨烯纳米复合材料由 MSH 和从天然微晶石墨演化而来的各种形式的石墨烯组成。四球实验表明，尽管存在 3.91 GPa 的严重接触压力，但作为 PAO 添加剂的 MSH/石墨烯纳米复合材料显示出出色的摩擦学性能并几乎消除了磨损。这可以归因于石墨烯附着在MSH上，使其能够成功进入粗糙间隙，从而充分发挥石墨烯的作用'