• Low-load scratches compressed the polydopamine (PDA)/polytetrafluoroethylene (PTFE). PDA aggregates were by low-load and removed high-load ones. PDA/PTFE coating failed at a load corresponding to that of aggregate removal. Large initial wear depths reported in prior studies due compaction. The scratch behavior (PTFE) coatings has traditionally been studied using macro-scale tribometers. Howev...

With the increasing threat to forests in Europe from invasive pine wood nematode (PWN) Bursaphelenchus xylophilus, effective methods are needed monitor and reduce populations of its insect vector, sawyer beetle Monochamus galloprovincialis. In present study, we tested effectiveness different trap types (multiple-funnel, cross-vane, triangular), colours (black, white clear), lubricant (polytetra...

Metal particle size and environment will affect the reaction properties of aluminized polytetrafluoroethylene (Al/PTFE) reactive material. This study experimentally investigated Al/PTFE with different Al sizes through time-resolved self-emitting imaging emission spectroscopy under nanosecond laser ablation in air an inert argon environment. The results show that causes a continuous combustion c...

Gas diffusion electrodes (GDE) obtained by sputtering metal films on polytetrafluoroethylene (PTFE) membranes are among the most performant used to electrochemically reduce CO2. The present work reveals several essential aspects for fabricating PTFE-based gas (GDEs) CO2 electroreduction (CO2R). We show that adding an additive layer (a mixture of carbon and Nafion™ or only) is required stabilizi...

The application of polytetrafluoroethylene (PTFE) coatings to metal surfaces is a well-known procedure carried out avoid fouling phenomena on food-processing surfaces. Fluorine-based polymers are generally chemically and thermally stable, thus allowing them be the preferred choice when designing anti-stick in food service industry. Their lifespan, however, depends environmental conditions. It w...

This study was carried out to compare the tribological performances of 35wt.% graphite-added polytetrafluoroethylene (35G/PTFE) composite and 10wt.%PTFE filled polyamide 6 (10PTFE/PA6) polymer blend at different speeds used in rolling bearing applications. Tribological tests were on a pin-on-disc wear test rig sliding 1.0, 1.5 2.0m / under loads 50N 150N. Tests conducted against AISI 316L stain...

Carbon filled PTFE material has been used in various engineering applications due to its properties of self-lubrication and minimal porosity. In Paper Industry carbon composite is as a mechanical face seal prevent the leakage steam. During sealing application, subjected wear hence, it necessary determine rate compute life when different loading conditions. Researchers have studied tribological ...

Reduction of calcium carbonate (CaCO3) scale formation on the equipment surface is essential in a wide variety industrial fields. In this work, polydopamine/polytetrafluoroethylene (PDA/PTFE) coating prepared by simple immersion stainless steel (SS) surfaces was developed to suppress CaCO3 adhesion. The PDA/PTFE-coated showed higher hydrophobicity (water contact angle = 133.50°) and lower free ...

The ground-breaking article by Brescia and Cimino in 1966 (1) revolutionized the creation of the vascular access, and the Cimino fistula was soon used in almost all dialysis patients. Unfortunately, subsequent wide-spread use of PTFE grafts instead of AV fistulae occurred because of the ease of the surgical technique, the immediate availability of the graft for puncture, the need of high blood ...

OBJECTIVES The durability of bioprosthetic valves in the pulmonary position is suboptimal. The objectives of this study were to evaluate the early results of polytetrafluoroethylene (PTFE) bicuspid pulmonary valve (PV) implantation and to better define the function of this valve by magnetic resonance imaging (MRI). METHODS Fifty-six patients who underwent PTFE bicuspid PV implantation between...