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首页> 外文期刊>Applied Surface Science >Hemolymph drop impact outcomes on surfaces with varying wettability
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Hemolymph drop impact outcomes on surfaces with varying wettability

机译：血淋巴下降对不同润湿性表面的影响

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摘要

Insect fouling from coagulated hemolymph and exoskeleton parts is a major challenge in the aerospace industry for the next generation of aerodynamic surfaces, which will employ laminar flow that requires extremely smooth surfaces. However, the wetting physics and dynamics of hemolymph (insect blood) on surfaces are not well understood. The present study seeks to gain a fundamental insight on the effect of surface wetting characteristics and dynamics resulting from a hemolymph drop impact, the first such study. In particular, hemolymph drops extracted from Acheta domesticus were dispensed from a range of heights to vary the kinetic impact on surfaces, which had widely varying water wetting behavior (from superhydrophilic to superhydrophobic). The impact dynamics were investigated with high-speed imaging while the dried residues were studied with optical microscopy. It was found that a superhydrophobic surface (based on thermoplastic with silica nano-particles) was able to significantly reduce hemolymph drop spreading, and even provide complete rebound when impacting on inclined surfaces. (C) 2015 Elsevier B.V. All rights reserved.
机译：凝结的血淋巴和外骨骼部件对昆虫的污染是下一代航空动力学表面在航空航天工业中的主要挑战，下一代气动表面将采用层流，而层流需要极其光滑的表面。但是，人们对表面上的淋巴（昆虫血液）的润湿物理学和动力学知之甚少。本研究旨在获得对血淋淋滴影响所产生的表面润湿特性和动力学影响的基本见识，这是第一项此类研究。特别是，从一定范围的高度分配从Acheta domesticus提取的血淋巴滴剂，以改变对表面的动力学影响，这些表面具有广泛变化的水润湿行为（从超亲水性到超疏水性）。用高速成像研究冲击动力学，同时用光学显微镜研究干燥的残留物。发现超疏水表面（基于热塑性塑料和二氧化硅纳米粒子）能够显着减少血淋巴液滴的散布，甚至在撞击倾斜表面时提供完全的回弹。 （C）2015 Elsevier B.V.保留所有权利。

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