Scientists have created tiny carbon nanotubes that can filter water very effectively and one day can help seawater become potable water.
According to one study, nanotubes are similar to certain biological proteins used to filter moisture in living cells, but are six times more efficient. Although nanotubes are not used for desalinating in actual seawater, researchers say they can successfully filter like salty water. In order to be able to desalt seawater, nanotubes must be able to withstand higher pressures.
Alexander Noy, an associate professor at the University of California, said that the idea of ​​nanotubes comes from aquaporins. Aquaporins are found throughout the body: They are used to transport water through the membrane and filter out ions to keep cells healthy. AQP works only through the 0.3-nm-wide channel to transport water molecules, basically creating an ultra-fast column of water molecules and filtering out all ion-water channels. Proteins are difficult to use in man-made filtration systems because proteins are very fragile. It is difficult to reproduce. So the researchers decided to use carbon nanotubes, which is very powerful. These nanotubes are 0.8 nanometers wide. Like aquaporins, they introduce water molecules into a line that filters water six times faster than aquaporins.
Water channel proteins are slower because they filter out all ions, including protons. In order to do this, the water molecules flip 180 degrees in the aquaporin channel, and the chemical reaction slows down the molecule. Carbon nanotubes do not filter out protons, which allows a faster filtration system.
However, this still allows the nanotubes to filter out seawater very well. Nanotubes can be included in artificial membranes one day, removing ions from sea water and converting them into fresh water.
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Slitting machine for warp knitting is a type of equipment used to cut and slit warp knitted fabrics into smaller widths or strips. The machine is designed to handle a wide range of materials, including elastic and non-elastic fabrics, and can be used for a variety of applications, such as producing ribbons, tapes, and bindings.
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