A Hierarchical Conical Array with Controlled Adhesion and Drop Bounce Ability for Reducing Residual Non-Newtonian Liquids
A Hierarchical Conical Array with Controlled Adhesion and Drop Bounce Ability for Reducing Residual Non-Newtonian Liquids
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具有受控粘附和液滴弹跳能力的分层锥形阵列，可减少残留的非牛顿液体
DOI：
10.1007/s42235-021-0042-y
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发表时间：
2021-05
期刊：
影响因子：
--
通讯作者：
Ma Haile
中科院分区：
文献类型：
--
作者：
Song Yunyun;Yu Zhaopeng;Liu Yan;Dong Liming;Ma Haile
由于频繁的食物浪费和环境污染，对包装材料的开发需求不断增加，这些材料本质上抑制和减少非牛顿液体粘附的可能性。在这个作品中，灵感来自水黾腿上的纤毛结构，通过磁场控制和激光蚀刻形成分层锥形阵列，没有任何面具。由于锥体的锥形几何形状和阵列的多尺度表面粗糙度，液滴在撞击超疏水表面（SHS）后会多次反弹并滚出。通过改变锥形微柱的间距和顶角，SHS对多种非牛顿粘性液体具有可控的粘附性、良好的自清洁性能和液滴弹跳性能。经过多次撕带、手指触摸、折叠等各种损伤后，SHS仍保持了优异的超疏水性，作为各种包装界面材料具有潜在的应用前景。我们证明了分层阵列优异的液滴弹跳行为能够有效和稳健地防止食物液体粘附。
As a result of frequent food waste and environmental pollution, there has been an increasing demand for the development of packaging materials that intrinsically inhibit and reduce likelihood of non-Newtonian liquids adherence. In this work, inspired from ciliary structures on the leg of water strider, the hierarchical conical array was formed by magnetic field control and laser etching without any mask. Due to the tapered geometry of the cones and the multiscale surface roughness of the array, the droplets would bounce many times after impacting with the superhydrophobic surface (SHS) and roll off. By changing the spaces and apex angles of conical microcolumns the SHS has controlled adhesion, superior self-cleaning property and droplets bounce performance for a variety of non-Newtonian viscous liquids. After suffering from various types of damage including repeated tape tearing, finger touch and folding test, the SHS still maintained excellent superhydrophobic property, which may have potential application as all kinds of packaging interface materials. We demonstrate that the excellent droplets bounce behavior of the hierarchical array enables the efficient and robust prevention of food liquids adhesion.
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