Fluoropolymers are characterized by high chemical inertness and, when in solid state, by superficial dipoles due to the C-F bond where charge density is strongly displaced. These two characteristics are exploited here for fine control of charge balance in organic light-emitting devices and for preventing electrochemical interaction between heterogeneous layers. The insertion of a thin layer of ...

A novel PtFe@Pt core-shell nanostructure with a PtFe bimetallic core and a nanodendrite Pt shell was fabricated through a facile aqueous reduction process. Without any capping agent and/or surfactant, a clean Pt surface can be obtained. The novel nanostrutured crystals show superior electrocatalytic performance towards methanol oxidation due to the enlarged Pt surface area and the modified elec...

The research on decomposition characteristics of SF6 and its by-products have great significance to the operation, maintenance, condition assessment fault diagnosis power equipment. In this paper, particle composition models SF6, SF6/polytetrafluoroethylene (PTFE), SF6/PTFE/O2, SF6/PTFE/H2O, SF6/PTFE/O2/H2O were established by using Gibbs free energy minimization method, effects trace H2O O2 im...

BACKGROUND Recent data have suggested the existence of a relationship between the use of synthetic vascular accesses and increased erythropoietin (Epo) requirements. The present study aimed to evaluate the possible role of the type of vascular access in both Epo and intravenous (i.v.) iron requirements. METHODS One-hundred-and-seven individuals without recognized causes of Epo resistance, 62 ...

BACKGROUND AND PURPOSE Carotid endarterectomy (CEA) with patch angioplasty produces greater results than with primary closure; however, there remains uncertainty on the optimal patch material in CEA. A systematic review of randomized controlled trials (RCTs) was performed to evaluate the effect of angioplasty using venous patch versus synthetic patch material, and Dacron patch versus polytetraf...

Polytetrafluoroethylene (PTFE) shows an outstanding combination of chemical and physical properties such as excellent resistance to chemical reagents, thermal stability in a wide temperature range, high electric resistance, and low friction coefficient. However, PTFE is known to be extremely sensitive to high energy radiation undergoing scission of the main chain. As a result of the reduction o...

PURPOSE To determine the usefulness of slow-releasing tranilast in polytetrafluoroethylene/polylactide-co-glycolide (PTFE/PLGA) laminate for delayed adjustable strabismus surgery. METHODS A prospective, masked-observer, controlled study was performed in 25 rabbits. Fifty rabbit eyes were divided randomly into three groups. After a recession of the superior rectus muscle (SRM), a PTFE/PLGA lam...

The adhesive strength of polytetrafluoroethylene (PTFE) film increased drastically by heat-assisted plasma treatment and PTFE indicated cohesive failure inside the PTFE. By increasing temperature, defluorination progressed. treated with H2/He had significantly lower than only He. peak assigned to stretching vibration -CH2- could be observed in plasma. From above, we concluded improvement requir...

Although micro-arc oxidation (MAO) coatings are widely used for anti-wear protection of metals, they usually contain lots pores and exhibit high coefficient friction. In this work, porous MAO consisting Al2TiO5 were fabricated on the titanium substrate, then Ni-P Ni-P-polytetrafluoroethylene (PTFE) deposited via electroless plating to fill improve tribological performance. Electroless has wear ...

Over a seven year period from 1982 to 1989,3337 conduits were created in 3137 patients with end stage renal disease (ESRD) as access for chronic dialysis. These included 2690 side-to-side arteriovenous fistulae (A VF), 168 end-to-side A VFs, 10 autogenous vein grafts, 51 homogenous frozen vein grafts, 109 polytetrafluoroethylene (PTFE) grafts, 209 emergency external arteriovenous shunts, t...