Mechanical and Tribological Properties of Polytetrafluoroethylene Composites Modified by Carbon Fibers and Zeolite

Abstract

Currently, lightweight and high-strength polymer composites can provide weight savings in the automotive and process equipment industries by replacing metal parts. Polytetrafluoroethylene and polymer composites based on it are used in various tribological applications due to their excellent antifriction properties and thermal stability. This article examines the effect of combined fillers (carbon fibers and zeolite) on the mechanical, tribological properties, and structure of polytetrafluoroethylene. It is shown that the introduction of combined fillers into polytetrafluoroethylene retains the tensile strength and elongation at break at a content of 1–5 wt.% of carbon fibers, the compressive stress increased by 53%, and the yield stress increased by 45% relative to the initial polymer. The wear resistance of polymer composites increased 810-fold compared to the initial polytetrafluoroethylene while maintaining a low coefficient of friction. The structural features of polymer composites are characterized by X-ray diffraction analysis, infrared spectroscopy, and scanning electron microscopy.

Mechanical and Tribological Properties of Polytetrafluoroethylene Modified with Combined Fillers: Carbon Fibers, Zirconium Dioxide, Silicon Dioxide and Boron Nitride

“…Thus, the improvement in the wear resistance of PCM based on PTFE can be explained by a decrease in the propagation of subsurface cracks and a decrease in the size of wear products, as well as the formation of transfer films on the surface of the counterbody. It is known that strong transfer films on contacting surfaces are formed due to the occurrence of tribo-oxidative processes during friction [ 19 , 49 , 56 ]. Therefore, in order to elucidate the increase in the wear resistance of PCM, studies were carried out using IR spectroscopy ( Figure 7 ).…”

“…Wear of polymer composites based on PTFE with carbon fibers (PTFE/CF) at their low content from 1 to 10 wt.% occurs by a similar mechanism. Therefore, in order to increase the wear resistance of PTFE-based composites filled with fibers, dispersed fillers (oxides, layered silicates, sulfides, and graphite) are additionally added into them [ 18 , 19 , 20 , 21 ]. In the work of Ronghao L. et al [ 22 ] investigated the effect of plasma-treated CNTs on the mechanical properties of PTFE/CF composites.…”

Development of Doped Carbon Quantum Dot-Based Nanomaterials for Lubricant Additive Applications

“…CDs nanomaterials can be used to modify the tribological properties of lubricants due to their homogeneous size distribution and other physical and chemical characteristics [56] Moreover, the size, shape, structure, surface functional groups, and concentration of materials play an important role in determining the tribological properties of CD material-based lubricants [57]. The application of CDs and doped CD materials as lubricant additives is still in its infancy, despite the fact that CDs and doped CD materials demonstrate a number of inimitable characteristics [58].…”

Effects of Hybrid Rockwool–Wood Fiber on the Performance of Asbestos-Free Brake Friction Composites

“…In recent years, natural and synthetic fibers such as plant fiber [7,8], animal fiber [9], mineral fiber [10], glass fiber [11,12], carbon fiber [13], metal fiber [14,15], etc., have been added into composites to explore their effects on tribological properties. Among them, wood fiber has been widely used in the field of composite materials for the advantages of being a common source, its simple preparation, and its low price.…”