Polyimide/mesoporous silica nanocomposites: Characterization of mechanical and thermal properties and tribochemistry in dry sliding condition

Jian Ma, Xiaowen Qi, Yuanliang Zhao, Yu Dong, Laizhou Song, Qinglong Zhang, Yulin Yang
2016 Materials & design  
Mesoporous silica (MPS) with tunable mesopore channels can be used to reinforce polymers and has great potential in tribological applications, which is rarely investigated by research community. In this study, comprehensive properties of polyimide (PI)/MPS composites were investigated. Specially, the tribochemistry of PI/MPS composites in dry sliding against bearing steel was explicitly studied by the combined use of X-ray photoelectron spectroscopy (XPS) and Raman analysis. The results
more » ... The results demonstrated a slightly decreased tensile strength but increased modulus, microhardness and thermal stability of the PI/MPS composites. The incorporation of 1.5 wt.% MPS increased the anti-wear resistance of PI by more than 14-fold. This was highly associated with the formation of high-quality transfer film on the bearing steel counterpart surface. Relevant tribochemistry was thoroughly revealed by XPS analysis on the transfer film and Raman analysis on the worn surfaces. This study confirmed the high efficiency of using MPS to reinforce PI polymer for tribological applications and elaborated tribochemistry to further better understand tribochemical reactions in polymer-metal rubbing systems. . 2016. Polyimide/mesoporous silica nanocomposites: Characterization of mechanical and thermal properties and tribochemistry in dry sliding condition.
doi:10.1016/j.matdes.2016.07.036 fatcat:pvdz7olehraz5lmemrms55o46y