To improve the mechanical and tribological properties of bismaleimides (BMI), molybdenum disulfide (MoS2) hybrid nanosheets and reduced graphene oxide (rGO) as nanofillers were successfully prepared through two main steps which are the reaction of aminopropyltriethoxysilane (APS) and followed by reducing the resultant with hydrazine hydrate. The influence of the hybrid MoS2−rGO on the mechanical, tribological, and thermal properties of BMI resins was studied. After the linear reciprocating wear test, the results showed that with suitable addition of hybrid MoS2−rGO could largely enhance the tribological properties where the coefficient of friction and wear rate of 0.3125 wt.% MoS2-rGO showed the lowest. The wear mechanism of the BMI resins with the addition of MoS2−rGO was observed from the wear surface of the materials by scanning electron microscopy (SEM). The hardness of the materials was evaluated using Vickers Hardness Tester and had significantly shown that MoS2−rGO had significantly enhanced the hardness of BMI resins. The thermogravimetric analysis (TGA) and Differential Scanning Calorimetry (DSC) showed that the BMI composite with 0.3125 wt.% MoS2−rGO exhibited better thermal properties. The most optimum composition mainly attributes to the unique nanolayered structure of hybrid MoS2−rGO and good interfacial adhesion between BMI matrix and MoS2−rGO nanoparticles.

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