понедельник, 18 сентября 2017 г.

Filtering molecules from the water or air with…

Filtering molecules from the water or air with…


Filtering molecules from the water or air with nanomembranes


Physicists are producing and carrying out research on extra-thin foils



Free-standing carbon membranes that are a millionth of a millimetre thin: these are a special research field of Professor Dr. Armin Gölzhäuser from Bielefeld University and his research group. The nanomembranes can serve as ultrafine filters and as a protective layer. The Bielefeld physicists have registered several patents for manufacturing such molecular foils. In their research, they are analysing which properties the nanomembranes possess – as a basis for future applications.


If used to filter water, the carbon nanomembranes allow only water molecules to pass while blocking other molecules. If used to filter air, the membranes could, for example, remove carbon dioxide from vehicle exhaust emissions. ‘However, we still know very little about what happens when a molecule passes through such a sieve,’ says Gölzhäuser. ‘This is why we are studying, for example, whether it touches the membrane, remains stuck to it, or flies directly through its pores.’


Drawing on the results of this research, the scientists can modify the production of the nanomembranes to fit each specific purpose – for every use, the appropriate nanomembrane. ‘We can adapt the porosity of the membranes for different materials and also modify their conductivity, elasticity, density, and thickness.’



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