Synthetic of phenolic resin@SiO2 containing PAO6 to reinforce the tribological properties of PTFE/aramid fabric liner composites

Abstract

In this study, SiO2 containing PAO6 microcapsules were endowed with surface active groups by polydopamine (PSPMS). Then the modified microcapsules were in situ grafted into phenolic resin (PF@PSPMS) to control the dispersion and bonding in high viscosity resin. Further, the tribological properties of the PF coating and the prepared liner were analyzed. The results show that the life of PF@PSPMS-coating is 73 times longer than that of PF-coating, the friction coefficient (COF) is reduced by 78%. Meanwhiles the COF of the corresponding liner is reduced from 0.11 to 0.06, and the wear amount is reduced from 64.07 μm to 23.07 μm. The wear mechanism shows that the breakage of PSPMS release lubricating oil at the friction interface, forming a coordinated solid-liquid lubrication effect with PTFE. At the same time, the presence of lubricating oil can remove the debris on the surface of the friction pair and improve the quality of the transfer film. In addition, the dispersion of silica fragments at the friction interface is conducive to improving the hardness and wear resistance. This work provides a new method for the dispersion of microcapsules in the liner and further explains the anti-friction and wear mechanism of silica microcapsules in the liner system, confirming the effectiveness of microcapsules in the liner system.

Keywords

• In situ polymerization
• Self-lubricating fabric liner
• Friction and wear
• Solid-liquid synergetic lubricating