In collaboration with researchers at Shinshu University in Japan, director of the Center for Atomic Atoms at Penn State University, USA, developed a graphene-based desalting membrane that is more robust and efficient than the current filter membranes. The technology can be used in the future for seawater desalination, protein separation, wastewater treatment, and pharmaceutical and food industries.

"Our dream is to develop a smart membrane with high-throughput, high efficiency, long life, self-healing and other features that can provide solutions for the removal of biological pollution and inorganic pollution of water bodies in water-scarce areas, access to clean water" Mauricio Terrones, a professor of physical chemistry and materials science engineering at Penn State University, said: "The research is moving in this direction."

The hybrid membrane developed in this study uses a simple spraying technique to coat graphene oxide and a small amount of graphene in a solution on the framework support membrane of polyvinyl alcohol-modified polysulfone. The supporting film enhances the firmness of the hybrid membrane, enabling it to withstand strong cross-flow, high pressure and chlorine contact. Although the technology is still in its early stages of development, membrane samples have been filtered 85% salt, although the water can not be prepared directly drinking, but has been used for agricultural irrigation. Developed membrane can also filter out 96% of the dye molecules, it can be used in the textile industry wastewater treatment, to prevent direct discharge of wastewater into the river to pollute the environment.

Chlorine is commonly used to degrade bioactive components in wastewater, but it also causes the current properties of various polymer films to rapidly decrease. This new type of graphene-based film has a strong resistance to chlorine.

It is well-known that graphene has a high mechanical strength. Porous graphene has a strong filtration capability and can filter out almost 100% of the salt in the water. It is a potentially ideal desalting membrane material. However, there are many challenges in extending graphene to industrial quantities, including the need to manage complex defects by controlling defects and handling 2D materials. The research team is trying to overcome scalability issues and provide cheap, high-quality films on a production scale.

This result was published in the journal Nature / Nanotechnology on August 28th. Aaron Morelos Gomez, author of the paper, said: "The filter membrane we developed overcomes the water-solubility problem of graphene oxide and makes it resistant with polyvinyl alcohol Strong water currents and high pressure shocks We can also significantly improve the corrosion resistance of our corrosion resistant chemicals such as chlorine by mixing graphene with graphene. "

Chain Link Fence Making Machine

Jiaoyang Welding Industries Hebei Co., Ltd , https://www.jiaoyangmachine.com