Global 'graphene rush' continues as UK scientists stabilise membrane
Updated: Mar 15, 2019
The global race continues to scale up and commercialise the use of the super material graphene for water applications.
LONDON, England – The global race continues to scale up and commercialise the use of the super material graphene for water applications.
Scientists in the UK have now found a way to stop graphene oxide membranes swelling up during water filtration.
Previous efforts found that graphene oxide membranes could filter out nanoparticles, organic molecules and even large salts but struggled with common salts. When immersed in water, however, the membranes would expand, allowing smaller salts to flow through the pores.
Dr Raul Nair from the University of Manchester has demonstrated that by placing walls made of epoxy resin either side of the graphene membrane, it stopped the expansion.
By restricting the swelling, this also allowed the scientists to ‘tune’ the properties of the membranes, letting less or more common salt through, the BBC reported.
“In terms of scalability and the cost of the material, graphene oxide has a potential advantage over single-layered graphene.”
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