Abstract Ultralow wear rates and low friction have been observed for carbon fiber reinforced PTFE (CF/PTFE) when sliding against steel or cast iron in dry gas environments. Although the strong environmental sensitivity of this tribosystem is well known, origin outstanding tribological performance remains unanswered. Some researchers attribute to formation carbon-rich surfaces absence oxygen moi...

Spurious loss features were observed in mixed-powder compressed pellets measured transmission using terahertz time-domain spectroscopy. Loss identified two types of pellets: PTFE-glass microspheres and PTFE-lactose. The found to be dependent on grain size concentration. An explanation is proposed, based varying optical thickness the sample material.

In this research, a silver nanoparticle/polytetrafluorethylene (AgNP/PTFE) coating for metallic implants was fabricated using facile layer-by-layer method. PTFE nanoparticles were immobilized in sol–gel matrix and dip-coated onto 316L stainless steel via mussel-inspired approach followed by AgNP deposition. Benefiting from the synergistic effect of antibacterial non-stick PTFE, AgNP/PTFE exhibi...

Abstract Polytetrafluoroethylene (PTFE) polymer is used extensively in industry as a solid lubricant because of its lack reactivity with most industrial materials. However, PTFE has low abrasive resistance, limiting application. In this study, the mechanical and tribological characteristics PTFE-based composites addition clay nano-sheets (CNSs) were investigated. Clay nano-sheet-PTFE (CNSTCs) c...

Inorganic nanotubes (INTs) and fullerene-like nanoparticles (NPs) of WS2/MoS2 penetrate exfoliate at the contact interface facilitate tribofilm formation. While tribological properties are greatly improved by exfoliated NPs that shed easily, they may be diminished agglomeration in oil. Therefore, surface functionalization is employed to improve dispersion oil-based suspensions. Here, WS2 INTs w...

Composite coatings or films with polytetrafluoroethylene (PTFE) are typically utilized to offer superhydrophobic surfaces. However, the surfaces usually have limited durability, and require complicated fabrication methods. Herein, we report successful integration of PTFE ZnO ceramic achieve superhydrophobicity via one-step sintering method, cold process (CSP), at 300 °C. (1-x) ZnO–...

Polyamide (PA), polytetrafluoroethylene (PTFE), and olefinic oils are incompatible. High-energy radiation in the presence of oxygen can break PTFE chain, generating hydrophilic functional groups (COF, COOH) peroxy-radicals. Based on radicals, it is possible to establish a chemical bond between PA as well oil molecules. This study prepared PA-PTFE-oil-cb compounds (cb: chemically bonded) by reac...

celiac artery aneurysm is a rare visceral aneurysm, comparising only 4 % of them. in this article, an innovative surgical method is presented for the treatment o f such aneurysms. a 53 year old female referred to our center with epigastric pain and a mass in the region, which was diagnosed as a case of celiac artery aneurysm by using different imaging techniques. during the operation, according...