Membrane‐Based Strategy for Efficient Ionic Liquids/Water Separation Assisted by Superwettability
Membrane‐Based Strategy for Efficient Ionic Liquids/Water Separation Assisted by Superwettability
复制标题
DOI：
10.1002/adfm.201606544
复制
发表时间：
2017-05
影响因子：
19
通讯作者：
Jiajing Zhang;Hongliang Liu;Lei Jiang
中科院分区：
文献类型：
--
作者：
Jiajing Zhang;Hongliang Liu;Lei Jiang
离子液体作为一种新型的功能溶剂，在合成和材料化学中具有重要的应用前景。然而，在离子液体的合成和回收中使用挥发性有机溶剂通常会带来环境问题。在这项研究中，根据固有的润湿阈值理论，基于膜的方法辅助超润湿性被开发用于高效，方便，经济地纯化水不混溶性离子液体。通过精确调整表面能，多孔膜能够具有疏水性和超亲水性（定义为接近零的IL接触角），选择性地允许IL通过。这种功能膜不仅可以分离IL/水混合物，而且可以分离含有无机盐、有机化合物、氨基酸和蛋白质的IL/水体系。
Ionic liquids (ILs) acting as new functional solvents have significant impact in both synthetic and materials chemistry. However, the usage of volatile organic solvents in both synthesis and recycling of ILs usually imposes environmental issues. In this study, according to intrinsic wetting threshold theory, a membrane‐based approach assisted by superwettability is developed for efficient, convenient, and economical purification of water‐immiscible ILs. By precisely tailoring surface energy, the porous membrane is capable of hydrophobicity and superILphilicity (defined as IL contact angle close to zero), selectively allowing ILs to pass through. This kind of functional membrane can not only separate IL/water mixtures, but also IL/water systems containing inorganic salts, organic compounds, amino acids, and proteins.