ABSTRACT

To overcome the limited tribological properties of bismaleimide (BMI) resin, a kind of novel organic–inorganic hybrid silicon dioxide nanoparticles with terminal functional amidogen groups (SiO₂–NH₂) was prepared via a sol–gel process. The SiO₂–NH₂ was chosen as raw materials to react with polyformaldehyde and aniline, and the silicon dioxide-containing benzoxazine-monomer (SiO₂-BOZ) can be obtained via a solvent process. The new prepared SiO₂-BOZ were then as modified phase to modify BMI to prepare the SiO₂-BOZ/BMI composites. With 15.0 wt-% SiO₂-BOZ, the flexural strength and impact strength of SiO₂-BOZ/BMI composites can reached the maximum value of 166.12 MPa and 17.93 kJ m⁻², respectively, while the wear rate of SiO₂-BOZ/BMI composites is only 3.9 × 10⁻⁶ mm³ N⁻¹ m⁻¹. The enhanced tribological properties of SiO₂-BOZ/BMI can be attributed to the improvement of its heat resistance and mechanical properties, which can increase the capacity of the SiO₂-BOZ/BMI to withstand external forces and heat during the friction process.

摘要

为了克服双马来酰亚胺（BMI）树脂的有限的摩擦学性能，通过溶胶-凝胶法制备了一种新型的有机-无机杂化二氧化硅纳米粒子，其末端带有功能性酰胺基（SiO ₂ -NH ₂）。选择SiO ₂ -NH ₂作为原料与聚甲醛和苯胺反应，可以通过溶剂法获得含二氧化硅的苯并恶嗪单体（SiO ₂ -BOZ）。然后将新制备的SiO ₂ -BOZ作为改性相以改性BMI以制备SiO ₂ -BOZ / BMI复合材料。用15.0％（重量）的SiO ₂ -BOZ的SiO的弯曲强度和冲击强度₂-BOZ / BMI复合材料的最大值分别达到166.12 MPa和17.93 kJ m ^-2，而SiO ₂ -BOZ / BMI复合材料的磨损率仅为3.9×10 ^-6 mm ³  N ^-1  m ^-1。SiO ₂ -BOZ / BMI的摩擦学性能增强归因于其耐热性和机械性能的提高，这可以提高SiO ₂ -BOZ / BMI在摩擦过程中承受外力和热量的能力。