Tribological properties of bismaleimide alloy blend with a novel silicon dioxide-containing benzoxazine-monomer

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.