Preparation and tribological behavior of polytetrafluoroethylene/metal mesh composites with sandwich structure

Abstract

Polytetrafluoroethylene (PTFE) owns an excellent self‐lubricating performance, but its wear rate is very high due to the large‐scale spalling of the matrix in the friction. In this paper, A new kind of PTFE composites with sandwich structure was prepared by layer‐press technology, whose middle layer is filled with metal mesh. The influence of the mesh structure and mesh density of middle metal layer on tribological properties of composites were researched in detail. The results revealled that the metal mesh located in the composites can efficiently prevent the large‐scale spalling of PTFE, which induces the sample of PTFE/500# plain woven dutch metal mesh (PTFE‐500#PWD) to have a lower wear rate (9 × 10−5 mm3/Nm) and COF (0.106) under the fixed experimental condition. The prepared PTFE/metal mesh composites reveal excellent anti‐friction and anti‐wear performance, which can be used to fabricate a new kind of self‐lubricating materials.

Effect of nano-serpentine and nano-La2O3 on the frictional properties of PTFE composites in seawater environment

“…Thus, the corrosion and wear are the two key technical problems in ocean equipment (Xiao and Ji, 2021; Wu et al , 2019). Compared with metals and ceramics, polymers and their composites have good corrosion resistance property and the ability of burying foreign matters such as wear particles or sand particles and often have excellent tribological property (Zhang et al , 2021; Jain et al , 2019). Therefore, polymers and their composites, such as nylon and rubber, have been widely used in the production of water-lubricated bearings and gears (Wang et al , 2019; Nguyen et al , 2022).…”

The sustainable recycling of polyvinylidene fluoride membrane for tribological application

“…The excellent chemical stability, corrosion resistance and self‐lubricating effect of polytetrafluoroethylene (PTFE) has attracted much attention as the solid engineering material with the smallest friction coefficient 16–18 . However, the application of PTFE is limited due to the high cost, poor mechanical property, and wear resistance 19–21 . PVDF is considered as a substitute for PTFE for some tribological conditions because of its low cost, better solubility and wear resistance.…”

“…[16][17][18] However, the application of PTFE is limited due to the high cost, poor mechanical property, and wear resistance. [19][20][21] PVDF is considered as a substitute for PTFE for some tribological conditions because of its low cost, better solubility and wear resistance. But the problems of PVDF are high friction coefficient and poor self-lubricating properties.…”