China develops membrane that could be used to desalinate seawater

A group of Chinese researchers have developed a type of porous membrane that could be useful for seawater desalination and oily wastewater purification, state media reported.

The experts, led by researcher He Bin, from the Academy of Sciences of Guangzhou province (southeast), designed a high-performance, low-cost and scalable membrane that has “great resistance to oil”, the agency reported. Xinhua State.

The technique is based on the generation of steam with solar energy through photothermal conversion, a process in which the membrane separates the water vapor from the sea or residual water.

This is a “sustainable and highly efficient” method to alleviate water scarcity, says the Xinhua office.

Thanks to the membrane and its hydrophilic properties, the process is capable of generating steam using solar energy with an efficiency of 90.33%.

The study explains how the scientists improved the hydrophilicity of the membrane, made of a material called polydopamine, by adding diiron trioxide and KH-550, an amino-functional coupling agent that provides greater adhesion between inorganic substrates and organic polymers.

With information from La Patilla