Department of Integrated Design Engineering, Faculty of Science and Technology, Keio University , 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522 Japan.
Langmuir. 2016 Jul 19;32(28):7219-27. doi: 10.1021/acs.langmuir.6b01397. Epub 2016 Jul 11.
We describe a novel method for the simple and eco-friendly fabrication of porous polyelectrolyte films. A polyelectrolyte with many amine groups undergoes structural transformation from a dense to a porous structure upon immersion in a specific metal ion solution. The porous transition was the result of a reaction-induced phase separation, which was caused by the formation of new bonds between the polyelectrolyte and metal ions. This method enables control of the pore size of the porous structure in the nanoscale (54 nm) to microscale (1.63 μm) range through variation of the concentration or type of metal ions in the solution. To the best of our knowledge, this is the first report illustrating wide-range control of the pore size of a porous polyelectrolyte structure achieved by metal ions. These porous polyelectrolyte films with adjustable pore size and metastable metal ions can be employed in applications such as adsorption and catalysis.
我们描述了一种简单且环保的制备多孔聚电解质薄膜的新方法。一种带有许多胺基的聚电解质在浸入特定的金属离子溶液后，其结构会从致密转变为多孔。多孔转变是由聚电解质与金属离子之间形成新键引起的反应诱导相分离的结果。通过改变溶液中金属离子的浓度或类型，可以将多孔结构的孔径在纳米级（54nm）到微米级（1.63μm）范围内进行控制。据我们所知，这是首次报道通过金属离子实现对多孔聚电解质结构的孔径进行大范围控制。这些具有可调孔径和亚稳金属离子的多孔聚电解质薄膜可应用于吸附和催化等领域。
