学术
蛇腹鳞表面的超微结构及减阻机理
张占立[1] 杨继昌[1] 丁建宁[1] 胡友耀[2] 解国新[1]
[1]江苏大学微纳米科学技术研究中心,镇江市212013 [2]中国一拖集团技术中心,洛阳市471003
摘 要:
用原子力显微镜观测了竹叶青蛇、短尾蝮蛇和赤链华游蛇腹鳞表面的超微结构,分析了腹鳞表面的减阻机理.结果表明：3种蛇腹鳞表面的超微结构均为微凸体、微孔和凹坑周期排列的规律结构;蛇的栖息环境不同,超微结构的排间距、微凸体长度以及微孔的直径、数量不同.从陆栖到水栖,微凸体长度逐渐减小,微孔数量逐渐增加.微凸体减少了腹鳞和地面间的实际接触面积,从而减小了滑动时的粘着力;腹鳞表面的疏水性,减少了接触面间水的粘附力.[著者文摘]
文章出处:
《农业机械学报》-2007年38卷9期 -155-158页
栏目信息:
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文献标识码:
A
Study on Ultrastructures and Resistance-reducing Mechanism of Ventral Scales＇s Surface from Three Species of Snakes
Zhang Zhanli , Yang Jichang, Ding Jianning ,Hu Youyao, Xie Guoxin （1. Jiangsu University ;2. Yituo Group Cooperation）
Abstract:
The ultrastructures of the ventral scales from Trimeresurus stejnegeri, Gloydius brevicaudus, and Sinonatrix annularis were observed by means of atomic force microscopy. The reducing- resistance mechanism of the ventral scales surface was analyzed. The results showed that the ultrastructures of three ventral scales were formed by arraying microfibrils, micropits and pits periodically. The ultrastructures of the ventral scales surface, such as the interval distance of the rows, the length of the microfibrils, the diameter and the number of the micropits and etc. are different in different inhabited environment. The length of the microfibrils decreases and the number of the micropits increases gradually from the terrestrial to the aquatic. The real contact- area between the ventral scales and the ground is reduced due to the microfibrils, which causes the decreasing of the adherence force in the sliding motion. The hydrophobia of the ventral scales surface reduces the adherence force.[著者文摘]
Key words:
Bionics, Ventral scale, Ultrastructure, Resistance-reducing mechanism
基金资助:
武器装备预研基金资助项目和高等学校博士学科点专项科研基金资助项目（项目编号：20040299001）
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