Hydrogen bond nanoscale networks showing switchable transport performance.
Hydrogen bond nanoscale networks showing switchable transport performance.
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DOI：
10.1038/srep00612
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发表时间：
2012
影响因子：
4.6
通讯作者：
Wang, Xun
中科院分区：
文献类型：
--
作者：
Long, Yong;Hui, Jun-feng;Wang, Peng-peng;Xiang, Guo-lei;Xu, Biao;Hu, Shi;Zhu, Wan-cheng;Lu, Xing-Qiang;Zhuang, Jing;Wang, Xun
氢键是一种典型的非共价键，其强度仅为一般共价键的十分之一。由于其易于断裂和重新形成，基于氢键的材料可以在其组装和其他性能中实现可逆行为，这在制造和可回收性方面提供了优势。本文利用氢键纳米网络在宏观尺度上实现了油水分离。这是通过使用孔径约为数十纳米的纳米线宏膜来实现的，纳米线宏膜可以与表面上的水分子形成氢键。研究还发现，乙醇分子逐渐取代水可以赋予该膜可调的传输特性。有人提出，在膜中的氢键网络是负责这种开关效应。油和水的成功分离，特别是在乳状液的形式，证明了显着的应用潜力。
Hydrogen bond is a typical noncovalent bond with its strength only one-tenth of a general covalent bond. Because of its easiness to fracture and re-formation, materials based on hydrogen bonds can enable a reversible behavior in their assembly and other properties, which supplies advantages in fabrication and recyclability. In this paper, hydrogen bond nanoscale networks have been utilized to separate water and oil in macroscale. This is realized upon using nanowire macro-membranes with pore sizes ~tens of nanometers, which can form hydrogen bonds with the water molecules on the surfaces. It is also found that the gradual replacement of the water by ethanol molecules can endow this film tunable transport properties. It is proposed that a hydrogen bond network in the membrane is responsible for this switching effect. Significant application potential is demonstrated by the successful separation of oil and water, especially in the emulsion forms.
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