Graphene filter membrane can significantly reduce the cost of seawater desalination. What is graphene green membrane? How to use it?

If you don’t know about graphene, you may be really fooled by this “high-tech product”. In fact, graphene filter membrane should be called “graphite filter membrane”. 3 million layers of graphene The thickness is about 1 mm. Although such a thin layer can filter seawater, it is expensive and cannot reduce the cost of seawater desalination. Many manufacturers produce not graphene filters at all, but graphene flake filters or graphite filters. filter membrane.

Let’s talk about graphene first. Graphene is extracted from graphite. It is a single-crystal two-dimensional carbon material. The thickness of 3 million layers of single-crystal graphene is about 1 mm. Although the thickness of graphene in various countries around the world Scientists have developed many technologies for extracting graphene, which can be mass-produced in factories, but the cost is not as low as imagined. If graphene is really applied to filter membranes, it will not only not reduce the cost of seawater desalination, but will increase the cost. As far as I know, the cost of refining graphene is calculated in grams, so this statement is wrong. .

Those graphene filters that absorb the heat of graphene use graphene flakes or graphite. Although graphene flakes and graphene have similar names, they are definitely not the same thing. As mentioned above , Graphene is a single crystal two-dimensional carbon material, and graphite flakes are not single crystal two-dimensional carbon materials. It is made up of multiple layers of graphene. Compared with graphite materials, it is just thinner and more Not really graphene. As for graphite, I don’t need much. The electric brushes, pencils, etc. on the train all contain a certain proportion of graphite. Those things are not valuable at all. The so-called "graphene filter membrane" is a pseudo-tech product.

So, the graphene filter membrane mentioned by the questioner is completely nonsense, and graphene underwear, graphene thermos cup, graphene electric heater, etc. are all hyped by the gimmick of graphene. , those who claim to use graphene as filter elements actually use graphene flakes. To put it more popularly, it is graphene flakes, and to put it more unpleasantly, it is pencil lead. It is not graphene in the strict sense at all. The so-called graphene Iron overlay filtration is a complete joke.