摘要
许多昆虫足上有光滑吸附垫,通过二相分泌液粘附到各种表面。为理解这种基于液体的吸附系统的功能,用在螽斯身上绑细线的方法,测量其在不同表面的摩擦力和吸附力,并用高速摄像机观察足垫的构造及吸附和分离的动作,测试足垫与接触面的接触面积。结果表明螽斯的水平摩擦力大于垂直吸附力。足垫与表面接触时向身体方向拖动来增加摩擦力。分离时采用剥离的方法,但剥离方向与刚毛型足垫的相反,是从末梢端翘起分离,达到行动迅速且节省能量的目的。测试结果可用于机器人吸附足掌的仿生设计。
Many insects possess smooth adhesive pads on their legs, which adhere by thin films of a two-phasic secretion. To understand the function of such fluid-based adhesive systems, friction forces and adhesive forces of katydids on different surfaces was measured. Construction of the pads and the action of adhesion and detachment were observed through high speed video camera. And the contact area was also tested. The results show that friction force is larger than adhesive force. Pads pull toward the body to increase friction when in contact with the surface. The method of peeling is used to separate, but the direction of peeling in katydids is opposite from that in hairy pads. It peels from the end of the pad and so to obtain the aim of moving promptly and saving the energy. The results can be used for the design of biomimetics.
出处
《生物物理学报》
CAS
CSCD
北大核心
2009年第5期361-365,共5页
Acta Biophysica Sinica
基金
国家自然科学基金(50405045)
国家863计划资助项目(2007AA04Z253)~~
关键词
螽斯
吸附垫
吸附力
湿吸
剥离
Katydids
Adhesive pads
Adhesive force
Wet adhesion
Peeling
