Improved Mechanical and Tribological Properties of Bismaleimides Resins by Surface-Functionalized Molybdenum Disulfide

In order to improve the mechanical and tribological properties of bismaleimides (BMI), molybdenum disulfide (MoS2) as a filler was surface-functionalized with N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (KH-792) via a hydrolysis process, and the imino and amidogen groups were then introduced onto the surface of MoS2(NH2-MoS2). The influence of the NH2-MoS(2)content on the mechanical, tribological, and thermal properties of BMI resins was studied mainly. The results showed that suitable addition of the NH2-MoS(2)could largely enhance the mechanical properties due to the chemical reaction between BMI and NH2-MoS2, decrease the frictional coefficient and wear rate of BMI resins dramatically. The wear mechanism of the BMI resins with the addition of NH2-MoS(2)was converted from adhesive wear to abrasive wear, as observed from the wear surface of the materials by scanning electron microscopy (SEM). The thermogravimetric analysis (TGA) showed that the BMI composite with 5 wt% NH2-MoS(2)exhibited better thermotolerance, thus inhibiting the adhesive wear during the effective wear, which corresponded to the tribological properties of composites.