Orientation-Induced Effects of Water Harvesting on Humps-on-Strings of Bioinspired Fibers.
Orientation-Induced Effects of Water Harvesting on Humps-on-Strings of Bioinspired Fibers.
复制标题
集水对仿生纤维弦上驼峰的定向诱导效应
DOI：
10.1038/srep19978
复制
发表时间：
2016-01-27
影响因子：
4.6
通讯作者：
Zheng Y
中科院分区：
文献类型：
--
作者：
Chen Y;Li D;Wang T;Zheng Y
智能集水功能自然被赋予具有独特微结构的生物表面，例如，甲虫背部具有“交替的疏水、亲水微区”，蜘蛛丝具有湿重建的“纺锤结、关节”结构。受生物特征的启发，仿生表面的设计成为人类对淡水资源需求的积极课题。最近，从自然界的蜘蛛网观察，蜘蛛丝的网通常设置在不同的位置，并在空气中倾斜，因此蜘蛛丝可以放置在各种方位，以捕获水。在这里，我们展示了驼峰的风格和方向，以控制水收集的能力，作为仿生丝绸成功制造。不同的弦，驼峰的大小（高度、长度、节距）可以成为控制极端水滴体积的因素。这是由于不同的固/液接触区域导致调制湿粘附由于驼峰的方向串。高-低粘附性的转换可以依赖于用于捕获水滴的效果的取向来实现。这些研究提供了一个洞察到水收集效率的提高，并有助于设计智能材料控制水滴捕获和释放通过转换的高低粘附。
Smart water-collecting functions are naturally endowed on biological surfaces with unique wettable microstructures, e.g., beetle back with “alternate hydrophobic, hydrophilic micro-regions”, and spider silk with wet-rebuilt “spindle-knot, joint” structures. Enlightened by the creature features, design of bio-inspired surfaces becomes the active issue in need of human beings for fresh water resource. Recently, as observed from spider web in nature, the net of spider silk is usually set in different situations and slopes in air, thus spider silks can be placed in all kinds of orientations as capturing water. Here, we show the styles and orientations of hump-on-string to control the ability of water collection as bioinspired silks are fabricated successfully. As different strings, sizes (height, length, pitch) of humps can become the controlling on volumes of extreme water drops. It is related to the different solid/liquid contact regions resulting in the as-modulated wet adhesion due to orientations of humps-on-strings. The conversion of high-low adhesion can be achieved to rely on orientations for the effect of capturing water drops. These studies offer an insight into enhancement of water collection efficiency and are helpful to design smart materials for controlled water drop capture and release via conversions of high-low adhesion.