Bioinspired rice leaf and butterfly wing surface structures combining shark skin and lotus effects
Bioinspired rice leaf and butterfly wing surface structures combining shark skin and lotus effects
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DOI：
10.1039/c2sm26655e
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发表时间：
2012-01-01
期刊：
影响因子：
3.4
通讯作者：
Bhushan, Bharat
中科院分区：
文献类型：
--
作者：
Bixler, Gregory D.;Bhushan, Bharat
生机勃勃的大自然是许多创新的灵感来源，并继续作为解决技术挑战的宝贵资源。我们发现稻叶和蝴蝶翅膀独特的表面特征结合了鲨鱼皮（各向异性流动导致低阻力）和莲花（超疏水和自清洁）效应，产生了我们所说的稻和蝴蝶翅膀效应。结合实际样本和复制样本，对稻叶和蝴蝶翅膀进行了系统研究。为了模仿水稻和蝴蝶翅膀效应，复制稻叶和鲨鱼皮样品采用了超疏水和低粘附力的纳米结构涂层。将这些数据与未涂层的鱼鳞和鲨鱼皮样品的数据进行比较。使用软件分析通过 SEM 和光学轮廓仪成像进行表面形态表征。阻力是通过对矩形管道流道复制品进行压降测量来确定的（使用层流和湍流状态下的水和空气）。莲花效应通过自清洁、接触角和粘附力测量来显示。讨论了结果并显示了概念模型，描述了与低阻力、自清洁和防污性能相关的表面结构的作用。
Living nature is the inspiration for many innovations and continues to serve as an invaluable resource to solve technical challenges. We find that unique surface characteristics of rice leaves and butterfly wings combine the shark skin (anisotropic flow leading to low drag) and lotus (superhydrophobic and self-cleaning) effects, producing what we call here the rice and butterfly wing effect. A systematic study has been conducted with rice leaves and butterfly wings, using a combination of actual and replica samples. In order to mimic the rice and butterfly wing effect, replica rice leaf and shark skin samples received a superhydrophobic and low adhesion nanostructured coating. The data are compared to those of uncoated samples of fish scales and shark skin. Surface morphology characterization is conducted with SEM and optical profiler imaging using software analysis. Drag is determined with pressure drop measurements from replica lined rectangular duct flow channels (using water and air in laminar and turbulent regimes). The lotus effect is shown with self-cleaning, contact angle, and adhesion force measurements. Results are discussed and conceptual models shown describing the role of surface structures related to low drag, self-cleaning, and antifouling properties.