Abstract

Four modified multi-walled carbon nanotubes (MWCNTs) with diamion-N,N′-bis (salicylidene) Schiff base Cu (II) complexes were successfully prepared by a simple and effective ultrasonic method. Friction and wear properties of 0.1 wt.% of modified MWCNTs were tested in triisodecyl trimellitate, DE and trihydroxymethylpropyl trioleate on 30 N by a microtribometer, respectively, and compared with those of graphene oxide. The structures and morphologies of the nanocomposites were investigated by Fourier-transform infrared (FTIR) spectra and transmission electron microscopy, the topography of worn surfaces of the disks were also tested by a white light interferometer. The results show that modified MWCNTs dispersed evenly and displayed better friction-reduction and anti-wear performance. As modification by a diamion-N,N′-bis (salicylidene) Schiff base Cu (II) complex can decrease twining of MWCNTs and promote its depolymerization and orderliness; Furthermore, the function as “filling” and “insulation” of modified MWCNTs between friction pairs improved the worn surface morphology. The modification of MWCNTs with o-phenylenediamine salicylaldehyde Schiff base copper (II) complex will not only promote the agglomeration of a-MWCNTs, but also indicate better tribological properties than that of graphene oxide.

摘要

通过简单有效的超声波方法成功制备了四种具有双氨基-N,N'-双（水杨烯）席夫碱Cu（II）配合物的改性多壁碳纳米管（MWCNT）。通过微摩擦计在 30 N 的偏苯三酸三异癸酯、DE 和三油酸三羟甲基丙酯中分别测试了 0.1 wt.% 改性 MWCNTs 的摩擦和磨损性能，并与氧化石墨烯的摩擦和磨损性能进行了比较。通过傅里叶变换红外（FTIR）光谱和透射电子显微镜研究了纳米复合材料的结构和形貌，还通过白光干涉仪测试了磁盘磨损表面的形貌。结果表明，改性多壁碳纳米管分散均匀，具有更好的减摩和抗磨性能。作为由diamion-N修饰，N'-双（水杨烯）席夫碱Cu（II）配合物可以减少MWCNTs的缠绕并促进其解聚和有序；此外，摩擦副之间改性多壁碳纳米管的“填充”和“绝缘”功能改善了磨损表面形态。用邻苯二胺水杨醛席夫碱铜 (II) 络合物对多壁碳纳米管进行改性，不仅会促进 a-多壁碳纳米管的团聚，而且比氧化石墨烯具有更好的摩擦学性能。