To improve the tribological properties of bismaleimide (BMI) resin, silicon dioxide nanoparticles with imino and terminal functional amino groups were prepared through a sol–gel process to form a novel SiO2-NH2 hybrid. The as-prepared hybrid was then applied as a modifying agent for the BMI matrix to obtain SiO2-NH2/BMI composites. Compared to those of pure BMI resin, the volume wear rate and friction coefficient of the SiO2-NH2/BMI composites decreased significantly, while the wear mechanism changed from fatigue (BMI) to adhesive (SiO2-NH2/BMI) wear. This improvement in the tribological properties of the SiO2-NH2/BMI composites was attributed to the appropriate SiO2-NH2 added content, which endowed the BMI with excellent mechanical and thermal-resistant properties. Thus, the SiO2-NH2/BMI composites could resist the external load and excessive heat during the friction process.

中文翻译：

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用含有氨基的新型杂化二氧化硅增强双马来酰亚胺的摩擦学性能

为了改善双马来酰亚胺 (BMI) 树脂的摩擦学性能，通过溶胶-凝胶工艺制备了具有亚氨基和末端官能氨基的二氧化硅纳米粒子，以形成新型 SiO2-NH2 杂化物。然后将制备的混合物用作 BMI 基质的改性剂，以获得 SiO2-NH2/BMI 复合材料。与纯BMI树脂相比，SiO2-NH2/BMI复合材料的体积磨损率和摩擦系数显着降低，磨损机制从疲劳（BMI）磨损转变为粘着（SiO2-NH2/BMI）磨损。SiO2-NH2/BMI 复合材料摩擦学性能的这种改善归因于适当的 SiO2-NH2 添加量，这赋予了 BMI 优异的机械和耐热性能。因此，