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配置稀土溶液对碳纳米管进行表面改性,采用自组装膜技术在单晶硅表面制备了稀土改性碳纳米管复合薄膜,考察了其表面形貌、化学组成和摩擦学性能.扫描电子显微镜观察发现单晶硅表面附着了大量不规则排列碳纳米管,X射线光电子能谱仪分析发现稀土元素与薄膜表面的磷酸基发生了化学反应,从而使碳纳米管组装到基片表面.UMT-2MT摩擦试验机测试结果表明在给定的试验条件下,复合薄膜的摩擦系数较低,随载荷和速度的增加变化不大.由于稀土改性碳纳米管复合薄膜的存在,与未处理碳纳米管复合薄膜、硅烷薄膜相比,基片表面摩擦系数显著降低,并表现出了优异的耐磨性及摩擦稳定性.
Rare earth solution was used to modify the surface of the carbon nanotubes, and a rare earth-modified carbon nanotube composite film was prepared on the surface of the single crystal silicon by self-assembled film technique. The surface morphology, chemical composition and tribological properties were investigated. Scanning electron microscopy It was observed that a large number of irregularly arranged carbon nanotubes were attached to the surface of the monocrystalline silicon. The analysis of the X-ray photoelectron spectroscopy revealed that the rare earth element chemically reacted with the phosphoric acid group on the surface of the film to assemble the carbon nanotubes onto the surface of the substrate. The test results of 2MT friction tester show that the friction coefficient of the composite film is low and does not change much with the increase of the load and velocity under the given test conditions.Because of the existence of rare earth modified carbon nanotube composite film, Compared with the composite film and silane film, the coefficient of friction on the surface of the substrate is significantly reduced, and exhibits excellent abrasion resistance and frictional stability.