University of Science and Technology of China develops ion selective separation membrane

Recently, the team of Professor Xu Tongwen from the University of Science and Technology of China constructed a sub-2 nanometer covalent organic framework (COFs) membrane, which showed high monovalent cation permeability and very low divalent cation permeability , To achieve high-efficiency ion transmission and separation

The progress of ion separation technology is of great significance to the sustainable development of chemical industry production

Since 2011, Xu Tongwen’s team has carried out in-depth research in the development of monovalent/divalent ion selective separation membranes, mass transfer mechanism research and separation applications, and built a product system with independent intellectual property rights.

In order to further study the influence of the chemical environment of the sub-2 nanometer channel wall on the ion mass transfer and separation performance, the team used an interface growth strategy to construct an ultra-thin COFs film with one-dimensional vertical penetration of the sub-2 nanometer channel, using nitrogen and air atmosphere to heat up.

On the basis of a series of research results, the team developed a one-time molding preparation process for high-performance ion selective separation membranes to realize the preparation of pilot membrane products for monovalent/divalent ion selective separation membranes, which are demonstrated in a series of typical mixed ion systems Excellent separation effect