METHOD OF MAKING POROUS GRAPHENE MEMBRANES AND MEMBRANES MADE USING THIS METHOD Russian patent published in 2024 - IPC B01D67/00 B01D71/02 C01B32/186 C23C16/02 B32B9/04 B82Y30/00 A41D31/102 C30B25/18 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of making porous (perforated) graphene membranes, which are waterproof, but have good air permeability due to high vapor permeability through pores perforated in graphene layers. Method of making a layer of porous graphene with thickness in range of 1 nm to 100 nm with pores having an average characteristic width in range of 1 nm to 1000 nm includes the following steps: providing a catalytically active substrate for catalysis of graphene formation in chemical vapor deposition conditions, wherein said catalytically active substrate on its surface is provided with a plurality of catalytically inactive domains having a nanostructure substantially corresponding to the shape of the pores in the obtained porous graphene layer; chemical vapor deposition using a carbon source in gas phase and formation of a layer of porous graphene on the surface of a catalytically active substrate, wherein the pores in the porous graphene layer are formed in situ due to the presence of catalytically inactive domains; wherein the catalytically active substrate is a substrate from a copper-nickel alloy with copper content in range of 98 wt.% to less than 99.96 wt.% and nickel content in the range of more than 0.04 wt.% to 2 wt.%, wherein content of copper and nickel is 100 wt.% of catalytically active substrate. Present invention describes graphene layer (5) obtained using this method, an article of textile or clothing having at least one layer of said graphene, and use of the graphene layer as a semipermeable membrane.

EFFECT: creation of a new method of producing highly porous graphene layers and multilayer structures containing such porous graphene layers, characterized by high porosity in combination with (mechanically strong) large thickness and/or mechanical rigidity, separately or in combination with specific woven or nonwoven materials, such as polyurethane nonwoven materials.

19 cl, 27 dwg