Droplet and Fluid Gating by Biomimetic Janus Membranes
Droplet and Fluid Gating by Biomimetic Janus Membranes
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DOI：
10.1002/adfm.201400714
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发表时间：
2014-10-15
影响因子：
19
通讯作者：
Ikkala, Olli
中科院分区：
文献类型：
--
作者：
Tian, Xuelin;Jin, Hua;Ikkala, Olli
门控的能力（即，允许或阻止）液滴和流体以定向方式输送代表了一种重要的液体操纵形式，并且在涉及智能液体管理的领域中具有巨大的应用潜力。受跨膜亲水/疏水相互作用调节渗透性的跨细胞膜被动转运的启发，通过用于液体门控的简易蒸气扩散或等离子体处理来制备宏观亲水/疏水Janus型膜。所得的Janus膜在空气-水系统中显示定向水滴门控行为。此外，首次展示了基于膜的连续水流定向门控，使Janus膜能够充当简单的流体二极管，用于单向流量调节。此外，在油-水系统中，Janus膜显示液滴的定向门控，具有对油或水的综合选择性。Janus膜的上述优异的门控性能将在流体精馏、微化学反应控制、高级分离、生物医学材料和智能纺织品等方面带来新的应用。
The ability to gate (i.e., allow or block) droplet and fluid transport in a directional manner represents an important form of liquid manipulation and has tremendous application potential in fields involving intelligent liquid management. Inspired by passive transport across cell membranes which regulate permeability by transmembrane hydrophilic/hydrophobic interactions, macroscopic hydrophilic/hydrophobic Janus-type membranes are prepared by facile vapor diffusion or plasma treatments for liquid gating. The resultant Janus membrane shows directional water droplet gating behavior in air-water systems. Furthermore, membrane-based directional gating of continuous water flow is demonstrated for the first time, enabling Janus membranes to act as facile fluid diodes for one-way flow regulation. Additionally, in oil-water systems, the Janus membranes show directional gating of droplets with integrated selectivity for either oil or water. The above remarkable gating properties of the Janus membranes could bring about novel applications in fluid rectifying, microchemical reaction manipulation, advanced separation, biomedical materials and smart textiles.