Chinese scholars have made progress in the research of covalent organic frame membrane membrane distillation seawater desalination

With funding from the National Natural Science Foundation of China (approval numbers: 21625102, 21971017, 21922502, 21674012), the team of Professor Wang Bo and Feng Xiao from Beijing Institute of Technology and the team of Professor Wang Fengchao from the University of Science and Technology of China have made progress in the field of membrane distillation seawater desalination.

With the rapid growth of the global population and the continuous development of industry, the shortage of freshwater resources has become a global problem that needs to be solved urgently.
Desalination is an effective way to solve the problem of freshwater crisis
.

In response to the above problems, the research team used a two-dimensional covalent organic framework (COF) film with regular penetrating nanopores as a basis.
By introducing a competitive reversible covalent bonding strategy, the pore size and pore hydrophilicity and hydrophobicity were prepared.
The COF membrane whose environment changes with the depth gradient (see Figure 1) realizes seawater desalination by high-flux membrane distillation
.