A5070048919- Lubricants and Their Additives
- Gear and Bearing Dynamics Analysis
- Proteins in Food Systems
- Adhesion, Friction, and Surface Interactions
- Tribology and Lubrication Engineering
- Tribology and Wear Analysis
- Polysaccharides Composition and Applications
- Corrosion Behavior and Inhibition
- Hydrogels: synthesis, properties, applications
- Metal and Thin Film Mechanics
- Osteoarthritis Treatment and Mechanisms
- Electrospun Nanofibers in Biomedical Applications
- Diamond and Carbon-based Materials Research
- High-Temperature Coating Behaviors
- Hydrogen embrittlement and corrosion behaviors in metals
- Food composition and properties
- Mechanical stress and fatigue analysis
- Advanced Sensor and Energy Harvesting Materials
- Dysphagia Assessment and Management
- Meat and Animal Product Quality
- Bee Products Chemical Analysis
- Microencapsulation and Drying Processes
- Advancements in Transdermal Drug Delivery
- Nanocomposite Films for Food Packaging
- Botanical Research and Chemistry
University of Leeds
2016-2024
Investigation of a lubrication behavior phase change materials (PCM) can be challenging in applications involving relative motion, e.g., sport (ice skating), food (chocolates), energy (thermal storage), apparel (textiles with PCM), etc. In oral tribology, often occurs sequence dynamic interactions between the ingested PCM and surfaces from licking stage to saliva-mixed at contact scales spanning micro- (cellular), meso- (papillae), macroscales. Often performance correlations across length...
Polysaccharides are often used as rheology modifiers in multiphasic protein-rich food systems. Recently, proteinaceous microgels have garnered research attention promising lubricating agents. However, whether can be to replace polysaccharides a tribological context remains poorly understood. In this study we compared the flow and oral-tribological behaviour of Newtonian solutions polysaccharide dextran (D, 1–11 wt%) when combined with dispersion whey protein isolate (W, 1–13 or (WPM, 41.7...
The effect of N-Tallow-1,3-DiaminoPropane (TDP) on friction, rolling wear and micropitting has been investigated with the ultimate objective developing lubricants no or minimal environmental impact.A Mini Traction Machine (MTM-SLIM) utilised in order to generate tribofilms observe TDP anti-wear tribofilm formation friction.Micropitting was induced surface specimens using a MicroPitting Rig (MPR).The X-ray Photoelectron Spectroscopy (XPS) analytical technique employed investigate chemical...
The ability to create a superlubricious aqueous lubricant is important for various biological and technological applications. Here, nonlipid biolubricant with strikingly low friction coefficients fabricated (patented) by reinforcing fluid-like hydrogel composed of biopolymeric nanofibrils proteinaceous microgels, which synergistically provide superlubricity on elastomeric surfaces in comparison any the sole components. This two-component positively charged lactoferrin microgels negatively...
The aim of this study was to understand the frictional behaviour non-purified plant proteins (i.e. pea protein concentrate (PPc) and soy isolate (SPI)) compared dairy (whey (WPI) sodium caseinate (NaCas)). comparison conducted for aqueous dispersions at 10 20 wt% pH 6.8. Owing protein-protein aggregation lower solubilities, showed prominent shear thinning behaviour, unlike proteins, which less dependence. Addition reduced boundary friction coefficients (μ) with NaCas showing lowest μ (p <...
Surface reactive additives are crucial in the lubrication of surfaces experiencing cyclic contact. The combination lubricant, on material surface and complex tribo-contact conditions hinders design additive packages which can simultaneously protect steel from wear fatigue. Amine-based Organic Friction Modifiers (OFMs) influence tribological performance surfaces. This study investigates tribochemical impact three amine-based OFMs with Zinc DialkylDithioPhosphate (ZDDP) performance,...
In wind turbine gearboxes, (near-)surface initiated fatigue is attributed to be the primary failure mechanism. this work, surface of a hydrogenated tungsten carbide/amorphous carbon (WC/aC:H) thin-film was tested under severe cyclic tribo-contact using polyalphaolefin (PAO) and PAO + zinc dialkyldithiophosphate (ZDDP) lubricants. The film characterized in terms its structure chemistry X-ray diffraction, analytical transmission electron microscopy, including energy loss spectroscopy (EELS),...
Abstract This study aimed to compare the tribological and rheological properties of plant proteins versus their mixtures or conjugates with polysaccharides. We hypothesize that combining potato (Po) pectin (Pe) at various concentrations (0.5–5.0 wt%, ratios 1:1 1:2 w/w) will improve lubrication performance by virtue viscosity modification boundary lubrication. Po showed shear thinning behavior limited concentration‐dependence in mixed lubricity. Pe on other hand pronounced...
Astringency of phenolic-rich foods is a key tactile perception responsible for acceptability/ rejection plant extracts as ingredients in formulations. Covalent conjugation phenolic with proteins might be promising strategy to control astringency, but suffers from lack mechanistic understanding the lubrication point view. To shed light on this, this ex vivo study evaluated effect grape seed extract (GSE) legume protein (lupin, LP) tribological and surface adsorption performance GSE absence...
The ability to replicate the load-bearing properties of articular cartilage is attractive for many engineering applications, particularly bearings where low friction, wear, and high durability are required. Hydrogels widely used materials spanning diverse applications owing their lubricity unique mechanical/chemical properties. poor mechanical characteristics conventional hydrogels, especially compressive behavior, limit application in despite favorable such as poro/viscoelasticity...
The mechanisms of friction in natural joints are still relatively unknown and attempts at modelling cartilage-cartilage interfaces rare despite the huge promise they offer understanding bio-friction. This article derives a model combining finite strain, porous thin-film flow theories to describe lubrication cartilage-on-cartilage line contacts. material is modelled as compliant poroelastic which micro-scale fibrous structure interstitially filled with synovial fluid. fluid flows over...
Poroelastic materials are commonly found in biological systems, such as articulating cartilage, and the ability to predict their biphasic behaviour is a key step understanding of joint health development biomimetic devices. Here, fully coupled three dimensional finite element study presented demonstrate permeability dependent load carrying capacity fluid pressure time-varying poroelastic system. A bio-inspired material model demonstrated with relaxation simulations which first show results...