【摘 要】
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In this paper, the research on ultrastructure, friction properties and resistance-reducing mechanism of the ventral scales from Burmese Python was conducted to seek better methods of reducing adhesion
【机 构】
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School of Mechatronics Engineering Henan University of Science & Technology Luoyang China
【出 处】
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2010中国可再生能源科技发展大会
论文部分内容阅读
In this paper, the research on ultrastructure, friction properties and resistance-reducing mechanism of the ventral scales from Burmese Python was conducted to seek better methods of reducing adhesion and friction.The ultrastructures of the ventral scales for Burmese Python were studied by the SEM(Scanning Electron Microscope) and AFM (Atomic Force Microscope).Water contact angle of the ventral scales surface was measured carefully by contact angle measuring device, The friction properties between ventral scale and stainless steel ball were investigated under different conditions by multi-function friction and wear testing apparatus.At the same time, the friction properties between control sample, A3 steel, Polytetrafluoroethylene (PTFE) and stainless steel ball were compared with those of the ventral scales.The resistance-decreasing mechanism of the ventral scales was analyzed.The results show that the surface of the ventral scales is hydrophobic surface with a water contact angle of 97.6°.The ultrastructure of the ventral scales from Burmese Python is composed of finger-like micro-protuberance and plate structure which are periodically arrayed, and micro-pits are randomly arrayed on the plate structure.Under the same condition, the friction coefficient of ventral scale is 20% of that of A3 steel, which is little higher than that of PTFE.The micro-protuberance and the lower shear strength of the ventral scale can reduce the shearing adhesion between contacting surface.The hydrophobic surface reduces the water adhesion.The results of this work are useful to fabricate the resistance-reducing product and has wide application prospect.
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