蝴蝶翅膀表面水滴各向异性黏附性质  

Studies of the Anisotropic Property When Water Droplet Moves on Butterfly Wings

作　　者：王轲[1] 王景明[1] 江雷[1,2] 

机构地区：[1]北京航空航天大学化学与环境学院,北京100191 [2]中国科学院化学研究所分子科学国家实验室,北京100190

出　　处：《高等学校化学学报》2013年第1期180-184,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20901006);中央高校基本科研业务费专项基金(批准号:YWF-10-01-B16)资助

摘　　要：采用扫描电子显微镜(SEM)观察了双带闪蝶(Morpho Achilles)翅膀表面的微观形貌,通过样品的表观接触角表征了其浸润性,采用高敏感性微电力学天平比较了水滴在蝴蝶翅膀表面不同方向运动时受到的黏附力.实验结果表明,水滴沿着干燥的蝴蝶翅膀鳞片堆叠方向运动时受到的黏附力要明显小于其它方向运动时受到的力,且受力较稳定;当蝴蝶翅膀被水滴浸润后,水滴沿着湿润的蝴蝶翅膀鳞片堆叠方向运动时受到的黏附力接近甚至大于逆着鳞片堆叠方向运动时受到的力.The morphology of the butterfly wings （ Morpho Achilles） surface was observed by scanning electron microscope（SEM） and the wettability was characterized by the apparent contact angle. The adhesive forces between the water droplets and the surface of butterfly wings under different direction were characterized by a high-sensitivity microelectromechanical balance system. The experimental results show that the adhesive force when the water droplet moved along the direction of stacked scales was obviously smaller and more stable than that of other directions. If the wings were wetted, the adhesive forces were similar no matter in which direction the water droplets moved ; the force along the direction of stacked scales even would be bigger than that against the direction of stacked scales.

关 键 词：蝴蝶翅膀 表面黏附力 各向异性 微米结构 纳米结构 

分 类 号：O647[理学—物理化学]