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Lamellar slippage of bilayers--a hypothesis on low friction of natural joints
Zenon Pawlak1, Wieslaw Urbaniak2, Magda Hagner-Derengowska3
1Tribochemistry Consulting, Salt Lake City, Utah 84117 and Department of Physiotherapy, University of Bydgoszcz, Unii Lubelskiej 4c, 85-059 Bydgoszcz, Poland.
Abstract:
The cartilage's amphoteric surface behavior is a physical phenomenon in biological lubrication. However, there is a lack of knowledge on amphoteric phospholipids bilayers and in overcoming friction in cartilage joints. In this paper, friction experiments were conducted, and the cartilage's surface was characterized using pH and wettability, while the interfacial energy and coefficients were determined. The lamellar slippage of bilayers and a short-range repulsion between the interfaces of negatively charged (-PO4 (-)) cartilage surfaces resulted in low frictional properties of the joint.
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