Unidirectional solute transfer using a Janus membrane
Unidirectional solute transfer using a Janus membrane
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使用 Janus 膜进行单向溶质转移
DOI：
10.1016/j.memsci.2019.117723
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发表时间：
2020-02-15
影响因子：
9.5
通讯作者：
Huang, Chuixiu
中科院分区：
文献类型：
--
作者：
Dong, Ying;Li, Jing;Huang, Chuixiu
膜作为传质的选择性屏障，在分析、环境、能源和生物学中具有重要的应用。将改善膜工艺流动的单向溶质转移是一个挑战。在这里，宏观极端润湿性膜控制微观溶质转移。通过整合油下超疏水（UOSH）和水下超疏油（UWSO）表面制备Janus膜。在没有或有电场的情况下，溶质从UOSH侧到UWSO侧穿过Janus膜，但在相反方向上被阻止渗透。与UOSH表面相比，UWSO表面在其界面处对水中的溶质具有高亲和力。该复合膜实现了溶质的单向传递，可视为溶质传递二极管。该研究有助于理解宏观和微观界面行为之间的相关性，并有助于设计界面材料以实现可控的溶质传递和分离。
A membrane as a selective barrier of mass transfer is of great importance for applications in analysis, environment, energy, and biology. Unidirectional solute transfer that would improve membrane process flow is a challenge. Here, macroscopic extreme wettability of membranes controlling microscopic solute transfer is presented. A Janus membrane is prepared by integrating underoil superhydrophobic (UOSH) and underwater superoleophobic (UWSO) surfaces. Without or with electric field, solutes pass through the Janus membrane from the UOSH side to the UWSO side, but are impeded from penetrating in the reverse direction. The UWSO surface has a high affinity toward solutes in water compared to the UOSH surface at their interface. The composite membrane realizes unidirectional solute transfer, which can be considered as a solute transfer diode. This study may promote the understanding of the correlation between macroscopic and microscopic interfacial behaviors and facilitate the design of interfacial materials for controllable solute transfer and separation.