Effect of Low Depth Surface Texturing on Friction Reduction in Lubricated Sliding Contact
Hairy adhesive systems involved in gecko locomotion have drawn the interest of many researchers regarding the development of bionic solutions for fast and reversible adhesive technologies. To date, despite extensive efforts to design gecko-inspired adhesive surfaces, adhesion and friction capacities are often evaluated using smooth and rigid counterfaces, in general glass, whereas most natural and […]
Effect of Low Depth Surface Texturing on Friction Reduction in Lubricated Sliding Contact
Laser surface texturing is an interesting possibility to tailor materials’ surfaces and thus to improve the friction and wear properties if proper texture feature sizes are selected. In this research work, stainless steel surfaces were laser textured by two different laser techniques, i.e., the direct laser interference patterning by using a nanosecond pulsed Nd:YAG laser […]
Effect of Low Depth Surface Texturing on Friction Reduction in Lubricated Sliding Contact
Friction is a genuine issue in the use of many medical devices involving rubbery materials such as plungers in medical syringes. This paper presents a new direction for the reduction of friction in medical syringes based on surface texturing of the rubber plunger. The specimens were prepared by casting poly(vinylsiloxane) (PVS) rubber into a pre-fabricated […]
Developing Novel Poly(Lactic-Co-Glycolic Acid) (PLGA) Films with Enhanced Adhesion Capacity by Biomimetic Mushroom-Shaped Microstructures
The adhesion strength of biomimetic mushroom-shaped microstructures made of a biocompatible and biodegradable copolymer, PLGA, is experimentally studied. The adhesive microstructures were successfully produced using a two-step molding technique. The adhesive experiments were performed on a flat and smooth glass substrate using different normal preloads and under both dry (in air) and wet (underwater) contact […]
On the integration of micro textures of different shapes for the stability of biomimetic attachment systems
While biomimetic adhesive solutions have succeeded to be used in various engineering applications such as climbing robotic, handling systems facilities and mobile sensor platforms, their adaptation to biomedical engineering, such as patches for external use, is still in its early stage due to critical issues that must be resolved before wide usage. In this study, […]
Effect of the Mechanical Properties of Soft Counter-Faces on the Adhesive Capacity of Mushroom-Shaped Biomimetic Microstructures
The effects of mechanical properties and contact environment conditions on the adhesiveness of the biomimetic adhesive mushroom-shaped micro-structure have been experimentally investigated. The idea is based on the adhesive micro-structures and surfaces inspired by nature after observing the abilities of some animals. Applications are proposed in various fields of engineering and technology. However, to enable […]
Attachment ability of combined biomimetic adhesive macrotextures of different shapes
There are various potential applications of biomimetic adhesive solutions including climbing robotic systems, mobile sensor platforms, and biomedical applications such as patches for external use. Achieving resistance to both normal and tangential loads, however, is a critical issue that still needs to be addressed. Some animals have developed exceptional attachment mechanisms based on combined fibrillar […]
Experimental study of adhesion, friction, and peeling of biomimetic combined micro-mushroom and micro-spatulae textures
Although adhesive biomimetic textures have been extensively studied during the last decades, the natural combination of different micro-textures in some insects is still of interest due to the unique ability to optimize their adhesion and friction in different environmental conditions. This study presents a unique manufacturing method for creating combined textures of microfibril adhesive terminals […]
New experimental methodology to evaluate lubrication properties of synovial fluid containing worn tissue particles in osteoarthritis patients
Studying the lubrication properties of osteoarthritis (OA) synovial fluid (SF) enables an understanding of the boundary lubrication joint, mobility, and friction. However, tribology has never been combined with the clinical reality of the presence of worn particles within the synovial fluid and how they affect the osteoarthritic joints. Part of the problem relates to the […]
Tribological behavior of shape-specific microplate-enriched synovial fluids on a linear two-axis tribometer
Nano- and micro-particles are increasingly used to tune interfacial frictional properties into diverse applications, from friction modifiers in industrial lubrication to enhanced biological fluids in human osteoarthritic joints. Here, we assessed the tribological properties of a simulated synovial fluid enriched with non-spherical, poly lactic-co-glycolic acid (PLGA) microparticles (μPL) that have been previously demonstrated for the […]