In this paper, nano-TiO2lubricating fluid was chosen as an advanced rolling lubricant to investigate its effect on the hot rolled surface and metallographic structure of SS41 steel strips. The tribological performances of nano-TiO2 lubricating fluid were measured by a four-ball tribotester. The hot rolling experiments under different lubrication conditions were carried out by a four-high rollin...

PURPOSE To investigate the effect of a lubricating drop on optical quality, tear film stability, and subjective symptoms in individuals wearing silicone hydrogel contact lens. METHODS In this one-day, prospective single-center clinical study, Pre-lens Tear Deformation Time (PL-TDT), Root-Mean-Square (RMS) of Low Order Aberrations (LOA) and High Order Aberrations (HOA), individual twelve Zerni...

To recycle post-consumer HDPE contaminated with waste lubricating oils, companies include prior washing and drying in the process. This consumes large amounts of water and energy, generates significant effluent requiring treatment. This study assesses lubricating oil influence on HDPE properties to evaluate the feasibility of its direct mechanical recycling without washing. The current lubricat...

INTRODUCTION: Proteoglycan 4 (PRG4) is a mucinous glycoprotein present in synovial fluid (SF) that contributes to boundary lubrication of articular cartilage in a dose-dependent manner. PRG4 interacts with hyaluronan (HA), another dose-dependent cartilage boundary lubricant, to further decrease friction to levels near that of SF. Concentrations of PRG4 in human SF (hSF) have been reported to be...

Hyaluronic acid is the macromolecule which endows synovial fluid with its viscoelastic properties and it is often assumed these properties are important for the lubrication of the tissue surfaces in diarthrodial joints (Barnett, Davies, and MacConaill, 1961). The relationships, if any, that exist between the chemical and physical properties ofsynovial fluid and its lubricating ability, however,...

Tribology of SU-8 polymer is increasingly relevant due to bursting use of this material in a variety of applications. This study is directed towards introduction and investigation of a novel self-lubricating composite of an ionic liquid (IL) in SU-8. The new material can be utilized for fabrication of lubricating polymer coating with tunable surface properties or SU8-made elements for microelec...

A new method is described for the accurate determination of silicon (Si), phosphorus (P), and sulfur (S) in lubricating oil samples using an Agilent 8800 Triple Quadrupole ICP-MS (ICP-QQQ). An optimized oxygen (O2) massshift method provided limits of detection for 28Si, 31P, 32S and 34S of 0.25, 0.01, 0.18 and 0.75 ppb, respectively. The method was successfully applied to the determination of S...

The lubricating oils are essential for operating engine with high efficiency. Therefore, the physical properties of oil such as flash point, pour point, kinematic viscosity, specific gravity and the American Petroleum Institute are necessary to be studied to indicate good quality of the lubricating oil. In this study, we compare the physical properties of two virgin oils with re-refining oil. T...