Water Collection Behavior and Hanging Ability of Bioinspired Fiber
Water Collection Behavior and Hanging Ability of Bioinspired Fiber
复制标题
仿生纤维的集水行为和悬挂能力
DOI：
10.1021/la204682j
复制
发表时间：
2012-03-13
期刊：
影响因子：
3.9
通讯作者：
Jiang, Lei
中科院分区：
文献类型：
--
作者：
Hou, Yongping;Chen, Yuan;Jiang, Lei
由于润湿的筛状蜘蛛捕获丝的集水能力是独特的纤维结构的结果，因此已经对生物启发纤维进行了重要的研究，以便在雾化收集项目中暴露新的水获取途径。然而，仿生纤维的几何形状设计与悬滴能力有关，迄今为止尚未深入研究。在这里，我们制造生物启发纤维来研究水收集行为和几何形状的影响（即，纺锤结的周期性）对挂滴能力的影响。我们特别讨论了与仿生纤维上的几何周期性相关的水收集。我们揭示了在阈值条件下的三相接触线（TCL）的长度，以及在不同模式下悬滴的最大体积。研究表明，仿生纤维的几何结构诱导更强的水悬挂能力比均匀纤维，由于这种特殊的几何形状，有效地提供了一个增加TCL长度或限制接触长度被缩短。此外，该几何形状还通过控制在给定位置处将微小水滴收集在大水滴中来提高雾收集效率。
Since the water-collecting ability of the wetted cribellate spider capture silk is the result of a unique fiber structure, bioinspired fibers have been researched significantly so as to expose a new water-acquiring route in fogging-collection projects. However, the design of the geometry of bioinspired fiber is related to the ability of hanging drops, which has not been investigated in depth so far. Here, we fabricate bioinspired fibers to investigate the water collection behavior and the influence of geometry (i.e., periodicity of spindle knot) on the hanging-drop ability. We especially discuss water collection related to the periodicity of geometry on the bioinspired fiber. We reveal the length of the three phase contact line (TCL) at threshold conditions in conjunction with the maximal volume of a hanging drop at different modes. The study demonstrates that the geometrical structure of bioinspired fiber induces much stronger water hanging ability than that of uniform fiber, attributed to such special geometry that offers effectively an increasing TCL length or limits the contact length to be shorted. In addition, the geometry also improves the fog-collection efficiency by controlling tiny water drops to be collected in the large water drops at a given location.