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 ba...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 negative template obtained by 3D printing. Friction tests were performed on a home-made test-rig. It was clearly shown that friction resistance can be considerably manipulated when using textured plungers.展开更多
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 r...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 tribology methods studying friction by applying inadequate pin-on-disc techniques.In this study,synovial fluid with and without worn particles was studied using a customized tribometer.This method enables opening the contact at the end of each cycle and simulates better contact conditions of a natural knee joint and can thus be applied for evaluating the severity of joint OA and the treatment given to the patient.展开更多
基金funded by Maof Fellowships, the Council for Higher Education of Israel (Dr. H. Kasem)the MIA program the Ministry of Science, Technology & Space (Prof. A. Domb)
文摘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 negative template obtained by 3D printing. Friction tests were performed on a home-made test-rig. It was clearly shown that friction resistance can be considerably manipulated when using textured plungers.
基金The experimental test rig was funded by Maof Fellowships,the Council for Higher Education of Israel(Prof.Haytam KASEM).
文摘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 tribology methods studying friction by applying inadequate pin-on-disc techniques.In this study,synovial fluid with and without worn particles was studied using a customized tribometer.This method enables opening the contact at the end of each cycle and simulates better contact conditions of a natural knee joint and can thus be applied for evaluating the severity of joint OA and the treatment given to the patient.
